docs: update progress.txt for story 11.0

dashboard/api.py

@@ -35,6 +35,107 @@ GITEA_URL = os.environ.get('GITEA_URL', 'https://gitea.romfast.ro')
 GITEA_ORG = os.environ.get('GITEA_ORG', 'romfast')
 GITEA_TOKEN = os.environ.get('GITEA_TOKEN', '')
 
+
+def calculate_streak(completions, frequency):
+    """
+    Calculate the current streak for a habit based on completions array.
+    
+    Args:
+        completions: List of ISO timestamp strings representing completion dates
+        frequency: 'daily' or 'weekly'
+    
+    Returns:
+        int: The current streak count (days for daily, weeks for weekly)
+    
+    Rules:
+        - Counts consecutive periods from most recent completion backwards
+        - Daily: counts consecutive days without gaps
+        - Weekly: counts consecutive 7-day periods
+        - Returns 0 for no completions
+        - Returns 0 if streak is broken (gap detected)
+        - Today's completion counts even if previous days were missed
+    """
+    from datetime import datetime, timedelta
+    
+    # No completions = no streak
+    if not completions:
+        return 0
+    
+    # Parse all completion dates and sort descending (most recent first)
+    try:
+        completion_dates = []
+        for comp in completions:
+            dt = datetime.fromisoformat(comp.replace('Z', '+00:00'))
+            # Convert to date only (ignore time)
+            completion_dates.append(dt.date())
+        
+        completion_dates = sorted(set(completion_dates), reverse=True)
+    except (ValueError, AttributeError):
+        return 0
+    
+    if not completion_dates:
+        return 0
+    
+    # Get today's date
+    today = datetime.now().date()
+    
+    if frequency == 'daily':
+        # For daily habits, count consecutive days
+        streak = 0
+        expected_date = completion_dates[0]
+        
+        # If most recent completion is today or yesterday, start counting
+        if expected_date < today - timedelta(days=1):
+            # Streak is broken (last completion was more than 1 day ago)
+            return 0
+        
+        for completion in completion_dates:
+            if completion == expected_date:
+                streak += 1
+                expected_date -= timedelta(days=1)
+            elif completion < expected_date:
+                # Gap found, streak is broken
+                break
+        
+        return streak
+    
+    elif frequency == 'weekly':
+        # For weekly habits, count consecutive weeks (7-day periods)
+        streak = 0
+        
+        # Most recent completion
+        most_recent = completion_dates[0]
+        
+        # Check if most recent completion is within current week
+        days_since = (today - most_recent).days
+        if days_since > 6:
+            # Last completion was more than a week ago, streak is broken
+            return 0
+        
+        # Start counting from the week of the most recent completion
+        current_week_start = most_recent - timedelta(days=most_recent.weekday())
+        
+        for i in range(len(completion_dates)):
+            week_start = current_week_start - timedelta(days=i * 7)
+            week_end = week_start + timedelta(days=6)
+            
+            # Check if there's a completion in this week
+            has_completion = any(
+                week_start <= comp <= week_end
+                for comp in completion_dates
+            )
+            
+            if has_completion:
+                streak += 1
+            else:
+                # No completion in this week, streak is broken
+                break
+        
+        return streak
+    
+    return 0
+
+
 class TaskBoardHandler(SimpleHTTPRequestHandler):
     
     def do_POST(self):
@@ -48,6 +149,10 @@ class TaskBoardHandler(SimpleHTTPRequestHandler):
             self.handle_git_commit()
         elif self.path == '/api/pdf':
             self.handle_pdf_post()
+        elif self.path == '/api/habits':
+            self.handle_habits_post()
+        elif self.path.startswith('/api/habits/') and self.path.endswith('/check'):
+            self.handle_habits_check()
         elif self.path == '/api/workspace/run':
             self.handle_workspace_run()
         elif self.path == '/api/workspace/stop':
@@ -251,6 +356,8 @@ class TaskBoardHandler(SimpleHTTPRequestHandler):
             self.handle_cron_status()
         elif self.path == '/api/activity' or self.path.startswith('/api/activity?'):
             self.handle_activity()
+        elif self.path == '/api/habits':
+            self.handle_habits_get()
         elif self.path.startswith('/api/files'):
             self.handle_files_get()
         elif self.path.startswith('/api/diff'):
@@ -681,6 +788,206 @@ class TaskBoardHandler(SimpleHTTPRequestHandler):
         except Exception as e:
             self.send_json({'error': str(e)}, 500)
     
+    def handle_habits_get(self):
+        """Get all habits from habits.json with calculated streaks."""
+        try:
+            habits_file = KANBAN_DIR / 'habits.json'
+            
+            # Handle missing file or empty file gracefully
+            if not habits_file.exists():
+                self.send_json({
+                    'habits': [],
+                    'lastUpdated': datetime.now().isoformat()
+                })
+                return
+            
+            # Read and parse habits data
+            try:
+                data = json.loads(habits_file.read_text(encoding='utf-8'))
+            except (json.JSONDecodeError, IOError):
+                # Return empty array on parse error instead of 500
+                self.send_json({
+                    'habits': [],
+                    'lastUpdated': datetime.now().isoformat()
+                })
+                return
+            
+            # Ensure required fields exist
+            habits = data.get('habits', [])
+            last_updated = data.get('lastUpdated', datetime.now().isoformat())
+            
+            # Get today's date in YYYY-MM-DD format
+            today = datetime.now().date().isoformat()
+            
+            # Enhance each habit with streak and checkedToday
+            enhanced_habits = []
+            for habit in habits:
+                # Calculate streak using the utility function
+                completions = habit.get('completions', [])
+                frequency = habit.get('frequency', 'daily')
+                streak = calculate_streak(completions, frequency)
+                
+                # Check if habit was completed today
+                checked_today = today in completions
+                
+                # Add calculated fields to habit
+                enhanced_habit = {**habit, 'streak': streak, 'checkedToday': checked_today}
+                enhanced_habits.append(enhanced_habit)
+            
+            self.send_json({
+                'habits': enhanced_habits,
+                'lastUpdated': last_updated
+            })
+        except Exception as e:
+            self.send_json({'error': str(e)}, 500)
+    
+    def handle_habits_post(self):
+        """Create a new habit in habits.json."""
+        try:
+            # Read POST body
+            content_length = int(self.headers['Content-Length'])
+            post_data = self.rfile.read(content_length).decode('utf-8')
+            data = json.loads(post_data)
+            
+            # Validate required fields
+            name = data.get('name', '').strip()
+            frequency = data.get('frequency', '').strip()
+            
+            # Validation: name is required
+            if not name:
+                self.send_json({'error': 'name is required'}, 400)
+                return
+            
+            # Validation: frequency must be daily or weekly
+            if frequency not in ('daily', 'weekly'):
+                self.send_json({'error': 'frequency must be daily or weekly'}, 400)
+                return
+            
+            # Generate habit ID with millisecond timestamp
+            from time import time
+            habit_id = f"habit-{int(time() * 1000)}"
+            
+            # Create habit object
+            new_habit = {
+                'id': habit_id,
+                'name': name,
+                'frequency': frequency,
+                'createdAt': datetime.now().isoformat(),
+                'completions': []
+            }
+            
+            # Read existing habits
+            habits_file = KANBAN_DIR / 'habits.json'
+            if habits_file.exists():
+                try:
+                    habits_data = json.loads(habits_file.read_text(encoding='utf-8'))
+                except (json.JSONDecodeError, IOError):
+                    habits_data = {'habits': [], 'lastUpdated': datetime.now().isoformat()}
+            else:
+                habits_data = {'habits': [], 'lastUpdated': datetime.now().isoformat()}
+            
+            # Add new habit
+            habits_data['habits'].append(new_habit)
+            habits_data['lastUpdated'] = datetime.now().isoformat()
+            
+            # Write back to file
+            habits_file.write_text(json.dumps(habits_data, indent=2), encoding='utf-8')
+            
+            # Return 201 Created with the new habit
+            self.send_json(new_habit, 201)
+            
+        except json.JSONDecodeError:
+            self.send_json({'error': 'Invalid JSON'}, 400)
+        except Exception as e:
+            self.send_json({'error': str(e)}, 500)
+    
+    def handle_habits_check(self):
+        """Mark a habit as completed for today."""
+        try:
+            # Extract habit ID from path: /api/habits/{id}/check
+            path_parts = self.path.split('/')
+            if len(path_parts) < 4:
+                self.send_json({'error': 'Invalid path'}, 400)
+                return
+            
+            habit_id = path_parts[3]  # /api/habits/{id}/check -> index 3 is id
+            
+            # Get today's date in ISO format (YYYY-MM-DD)
+            today = datetime.now().date().isoformat()
+            
+            # Read habits file
+            habits_file = KANBAN_DIR / 'habits.json'
+            if not habits_file.exists():
+                self.send_json({'error': 'Habit not found'}, 404)
+                return
+            
+            try:
+                habits_data = json.loads(habits_file.read_text(encoding='utf-8'))
+            except (json.JSONDecodeError, IOError):
+                self.send_json({'error': 'Habit not found'}, 404)
+                return
+            
+            # Find the habit by ID
+            habit = None
+            habit_index = None
+            for i, h in enumerate(habits_data.get('habits', [])):
+                if h.get('id') == habit_id:
+                    habit = h
+                    habit_index = i
+                    break
+            
+            if habit is None:
+                self.send_json({'error': 'Habit not found'}, 404)
+                return
+            
+            # Check if already checked today
+            completions = habit.get('completions', [])
+            
+            # Extract dates from completions (they might be ISO timestamps, we need just the date part)
+            completion_dates = []
+            for comp in completions:
+                try:
+                    # Parse ISO timestamp and extract date
+                    dt = datetime.fromisoformat(comp.replace('Z', '+00:00'))
+                    completion_dates.append(dt.date().isoformat())
+                except (ValueError, AttributeError):
+                    # If parsing fails, assume it's already a date string
+                    completion_dates.append(comp)
+            
+            if today in completion_dates:
+                self.send_json({'error': 'Habit already checked today'}, 400)
+                return
+            
+            # Add today's date to completions
+            completions.append(today)
+            
+            # Sort completions chronologically (oldest first)
+            completions.sort()
+            
+            # Update habit
+            habit['completions'] = completions
+            
+            # Calculate streak
+            frequency = habit.get('frequency', 'daily')
+            streak = calculate_streak(completions, frequency)
+            
+            # Add streak to response (but don't persist it in JSON)
+            habit_with_streak = habit.copy()
+            habit_with_streak['streak'] = streak
+            
+            # Update habits data
+            habits_data['habits'][habit_index] = habit
+            habits_data['lastUpdated'] = datetime.now().isoformat()
+            
+            # Write back to file
+            habits_file.write_text(json.dumps(habits_data, indent=2), encoding='utf-8')
+            
+            # Return 200 OK with updated habit including streak
+            self.send_json(habit_with_streak, 200)
+            
+        except Exception as e:
+            self.send_json({'error': str(e)}, 500)
+    
     def handle_files_get(self):
         """List files or get file content."""
         from urllib.parse import urlparse, parse_qs

dashboard/habits.html

@@ -0,0 +1,726 @@
+<!DOCTYPE html>
+<html lang="ro">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="icon" type="image/svg+xml" href="/echo/favicon.svg">
+    <title>Echo · Habit Tracker</title>
+    <link rel="stylesheet" href="/echo/common.css">
+    <script src="https://unpkg.com/lucide@latest/dist/umd/lucide.min.js"></script>
+    <script src="/echo/swipe-nav.js"></script>
+    <style>
+        .main {
+            max-width: 900px;
+            margin: 0 auto;
+            padding: var(--space-5);
+        }
+
+        .page-header {
+            margin-bottom: var(--space-5);
+        }
+
+        .page-title {
+            font-size: var(--text-xl);
+            font-weight: 600;
+            color: var(--text-primary);
+            margin-bottom: var(--space-1);
+        }
+
+        .page-subtitle {
+            font-size: var(--text-sm);
+            color: var(--text-muted);
+        }
+
+        /* Empty state */
+        .empty-state {
+            text-align: center;
+            padding: var(--space-6) var(--space-4);
+            color: var(--text-muted);
+        }
+
+        .empty-state svg {
+            width: 64px;
+            height: 64px;
+            margin-bottom: var(--space-3);
+            opacity: 0.5;
+            color: var(--text-muted);
+        }
+
+        .empty-state-message {
+            font-size: var(--text-base);
+            margin-bottom: var(--space-4);
+        }
+
+        /* Add habit button */
+        .add-habit-btn {
+            display: inline-flex;
+            align-items: center;
+            gap: var(--space-2);
+            padding: var(--space-3) var(--space-5);
+            background: var(--accent);
+            color: white;
+            border: none;
+            border-radius: var(--radius-md);
+            font-size: var(--text-sm);
+            font-weight: 500;
+            cursor: pointer;
+            transition: all var(--transition-fast);
+        }
+
+        .add-habit-btn:hover {
+            filter: brightness(1.1);
+            transform: translateY(-1px);
+        }
+
+        .add-habit-btn svg {
+            width: 18px;
+            height: 18px;
+        }
+
+        /* Habits list */
+        .habits-list {
+            display: flex;
+            flex-direction: column;
+            gap: var(--space-3);
+        }
+
+        .habit-card {
+            background: var(--bg-surface);
+            border: 1px solid var(--border);
+            border-radius: var(--radius-md);
+            padding: var(--space-4);
+            display: flex;
+            align-items: center;
+            gap: var(--space-3);
+            transition: all var(--transition-fast);
+        }
+
+        .habit-card:hover {
+            border-color: var(--accent);
+            transform: translateY(-1px);
+        }
+
+        .habit-icon {
+            width: 40px;
+            height: 40px;
+            border-radius: var(--radius-md);
+            background: var(--bg-elevated);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            flex-shrink: 0;
+        }
+
+        .habit-icon svg {
+            width: 20px;
+            height: 20px;
+            color: var(--accent);
+        }
+
+        .habit-info {
+            flex: 1;
+        }
+
+        .habit-name {
+            font-size: var(--text-base);
+            font-weight: 500;
+            color: var(--text-primary);
+            margin-bottom: var(--space-1);
+        }
+
+        .habit-frequency {
+            font-size: var(--text-xs);
+            color: var(--text-muted);
+            text-transform: capitalize;
+        }
+
+        .habit-streak {
+            display: flex;
+            align-items: center;
+            gap: var(--space-1);
+            font-size: var(--text-lg);
+            font-weight: 600;
+            color: var(--accent);
+            flex-shrink: 0;
+        }
+
+        /* Habit checkbox */
+        .habit-checkbox {
+            width: 32px;
+            height: 32px;
+            border-radius: 50%;
+            border: 2px solid var(--border);
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            cursor: pointer;
+            transition: all var(--transition-fast);
+            flex-shrink: 0;
+            background: var(--bg-base);
+        }
+
+        .habit-checkbox:hover:not(.disabled) {
+            border-color: var(--accent);
+            background: var(--accent-light, rgba(99, 102, 241, 0.1));
+        }
+
+        .habit-checkbox.checked {
+            background: var(--accent);
+            border-color: var(--accent);
+        }
+
+        .habit-checkbox.checked svg {
+            color: white;
+        }
+
+        .habit-checkbox.disabled {
+            cursor: not-allowed;
+            opacity: 0.6;
+        }
+
+        .habit-checkbox svg {
+            width: 18px;
+            height: 18px;
+            color: var(--accent);
+        }
+
+        /* Loading state */
+        .loading-state {
+            text-align: center;
+            padding: var(--space-6) var(--space-4);
+            color: var(--text-muted);
+            display: none;
+        }
+
+        .loading-state.active {
+            display: block;
+        }
+
+        .loading-state svg {
+            width: 48px;
+            height: 48px;
+            margin-bottom: var(--space-3);
+            opacity: 0.5;
+            color: var(--text-muted);
+            animation: spin 1s linear infinite;
+        }
+
+        @keyframes spin {
+            from { transform: rotate(0deg); }
+            to { transform: rotate(360deg); }
+        }
+
+        /* Error state */
+        .error-state {
+            text-align: center;
+            padding: var(--space-6) var(--space-4);
+            color: var(--text-danger);
+            display: none;
+        }
+
+        .error-state.active {
+            display: block;
+        }
+
+        .error-state svg {
+            width: 48px;
+            height: 48px;
+            margin-bottom: var(--space-3);
+            color: var(--text-danger);
+        }
+
+        /* Modal */
+        .modal-overlay {
+            display: none;
+            position: fixed;
+            top: 0;
+            left: 0;
+            right: 0;
+            bottom: 0;
+            background: rgba(0, 0, 0, 0.5);
+            z-index: 1000;
+            align-items: center;
+            justify-content: center;
+        }
+
+        .modal-overlay.active {
+            display: flex;
+        }
+
+        .modal {
+            background: var(--bg-base);
+            border: 1px solid var(--border);
+            border-radius: var(--radius-lg);
+            padding: var(--space-5);
+            width: 90%;
+            max-width: 500px;
+            max-height: 90vh;
+            overflow-y: auto;
+            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
+        }
+
+        .modal-title {
+            font-size: var(--text-lg);
+            font-weight: 600;
+            margin-bottom: var(--space-4);
+        }
+
+        .form-group {
+            margin-bottom: var(--space-4);
+        }
+
+        .form-label {
+            display: block;
+            font-size: var(--text-sm);
+            font-weight: 500;
+            margin-bottom: var(--space-1);
+            color: var(--text-secondary);
+        }
+
+        .modal-actions {
+            display: flex;
+            justify-content: flex-end;
+            gap: var(--space-2);
+            margin-top: var(--space-5);
+        }
+
+        /* Radio group */
+        .radio-group {
+            display: flex;
+            gap: var(--space-3);
+        }
+
+        .radio-option {
+            flex: 1;
+        }
+
+        .radio-option input[type="radio"] {
+            display: none;
+        }
+
+        .radio-label {
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            padding: var(--space-3);
+            background: var(--bg-surface);
+            border: 1px solid var(--border);
+            border-radius: var(--radius-md);
+            cursor: pointer;
+            transition: all var(--transition-fast);
+            font-size: var(--text-sm);
+            font-weight: 500;
+            color: var(--text-secondary);
+        }
+
+        .radio-option input[type="radio"]:checked + .radio-label {
+            background: var(--accent);
+            color: white;
+            border-color: var(--accent);
+        }
+
+        .radio-label:hover {
+            border-color: var(--accent);
+        }
+
+        /* Toast */
+        .toast {
+            position: fixed;
+            bottom: var(--space-5);
+            left: 50%;
+            transform: translateX(-50%) translateY(100px);
+            background: var(--bg-elevated);
+            border: 1px solid var(--border);
+            padding: var(--space-3) var(--space-5);
+            border-radius: var(--radius-md);
+            font-size: var(--text-sm);
+            opacity: 0;
+            transition: all var(--transition-base);
+            z-index: 1001;
+        }
+
+        .toast.show {
+            transform: translateX(-50%) translateY(0);
+            opacity: 1;
+        }
+    </style>
+</head>
+<body>
+    <header class="header">
+        <a href="/echo/index.html" class="logo">
+            <i data-lucide="circle-dot"></i>
+            Echo
+        </a>
+        <nav class="nav">
+            <a href="/echo/index.html" class="nav-item">
+                <i data-lucide="layout-dashboard"></i>
+                <span>Dashboard</span>
+            </a>
+            <a href="/echo/workspace.html" class="nav-item">
+                <i data-lucide="code"></i>
+                <span>Workspace</span>
+            </a>
+            <a href="/echo/notes.html" class="nav-item">
+                <i data-lucide="file-text"></i>
+                <span>KB</span>
+            </a>
+            <a href="/echo/files.html" class="nav-item">
+                <i data-lucide="folder"></i>
+                <span>Files</span>
+            </a>
+            <a href="/echo/habits.html" class="nav-item active">
+                <i data-lucide="target"></i>
+                <span>Habits</span>
+            </a>
+            <button class="theme-toggle" onclick="toggleTheme()" title="Schimbă tema">
+                <i data-lucide="sun" id="themeIcon"></i>
+            </button>
+        </nav>
+    </header>
+    
+    <main class="main">
+        <div class="page-header">
+            <h1 class="page-title">Habit Tracker</h1>
+            <p class="page-subtitle">Urmărește-ți obiceiurile zilnice și săptămânale</p>
+        </div>
+
+        <!-- Habits container -->
+        <div id="habitsContainer">
+            <!-- Loading state -->
+            <div class="loading-state" id="loadingState">
+                <i data-lucide="loader"></i>
+                <p>Se încarcă obiceiurile...</p>
+            </div>
+
+            <!-- Error state -->
+            <div class="error-state" id="errorState">
+                <i data-lucide="alert-circle"></i>
+                <p>Eroare la încărcarea obiceiurilor</p>
+                <button class="btn btn-secondary" onclick="loadHabits()">Încearcă din nou</button>
+            </div>
+
+            <!-- Empty state -->
+            <div class="empty-state" id="emptyState" style="display: none;">
+                <i data-lucide="target"></i>
+                <p class="empty-state-message">Nicio obișnuință încă. Creează prima!</p>
+                <button class="add-habit-btn" onclick="showAddHabitModal()">
+                    <i data-lucide="plus"></i>
+                    <span>Adaugă obișnuință</span>
+                </button>
+            </div>
+
+            <!-- Habits list (hidden initially) -->
+            <div class="habits-list" id="habitsList" style="display: none;">
+                <!-- Habits will be populated here by JavaScript -->
+            </div>
+        </div>
+    </main>
+
+    <!-- Add Habit Modal -->
+    <div class="modal-overlay" id="habitModal">
+        <div class="modal">
+            <h2 class="modal-title">Obișnuință nouă</h2>
+            <div class="form-group">
+                <label class="form-label">Nume *</label>
+                <input type="text" class="input" id="habitName" placeholder="ex: Bazin, Sală, Meditație...">
+            </div>
+            <div class="form-group">
+                <label class="form-label">Frecvență</label>
+                <div class="radio-group">
+                    <div class="radio-option">
+                        <input type="radio" name="frequency" id="freqDaily" value="daily" checked>
+                        <label for="freqDaily" class="radio-label">Zilnic</label>
+                    </div>
+                    <div class="radio-option">
+                        <input type="radio" name="frequency" id="freqWeekly" value="weekly">
+                        <label for="freqWeekly" class="radio-label">Săptămânal</label>
+                    </div>
+                </div>
+            </div>
+            <div class="modal-actions">
+                <button class="btn btn-secondary" onclick="hideHabitModal()">Anulează</button>
+                <button class="btn btn-primary" id="habitCreateBtn" onclick="createHabit()" disabled>Creează</button>
+            </div>
+        </div>
+    </div>
+
+    <div class="toast" id="toast"></div>
+
+    <script>
+        // Theme management
+        function initTheme() {
+            const saved = localStorage.getItem('theme') || 'dark';
+            document.documentElement.setAttribute('data-theme', saved);
+            updateThemeIcon(saved);
+        }
+        
+        function toggleTheme() {
+            const current = document.documentElement.getAttribute('data-theme') || 'dark';
+            const next = current === 'dark' ? 'light' : 'dark';
+            document.documentElement.setAttribute('data-theme', next);
+            localStorage.setItem('theme', next);
+            updateThemeIcon(next);
+        }
+        
+        function updateThemeIcon(theme) {
+            const icon = document.getElementById('themeIcon');
+            if (icon) {
+                icon.setAttribute('data-lucide', theme === 'dark' ? 'sun' : 'moon');
+                lucide.createIcons();
+            }
+        }
+        
+        // Initialize theme and icons
+        initTheme();
+        lucide.createIcons();
+
+        // Modal functions
+        function showAddHabitModal() {
+            const modal = document.getElementById('habitModal');
+            const nameInput = document.getElementById('habitName');
+            const createBtn = document.getElementById('habitCreateBtn');
+            
+            // Reset form
+            nameInput.value = '';
+            document.getElementById('freqDaily').checked = true;
+            createBtn.disabled = true;
+            
+            // Show modal
+            modal.classList.add('active');
+            nameInput.focus();
+        }
+
+        function hideHabitModal() {
+            const modal = document.getElementById('habitModal');
+            modal.classList.remove('active');
+        }
+
+        // Form validation - enable/disable Create button based on name input
+        document.addEventListener('DOMContentLoaded', () => {
+            const nameInput = document.getElementById('habitName');
+            const createBtn = document.getElementById('habitCreateBtn');
+            
+            nameInput.addEventListener('input', () => {
+                const name = nameInput.value.trim();
+                createBtn.disabled = name.length === 0;
+            });
+
+            // Allow Enter key to submit if button is enabled
+            nameInput.addEventListener('keypress', (e) => {
+                if (e.key === 'Enter' && !createBtn.disabled) {
+                    createHabit();
+                }
+            });
+        });
+
+        // Create habit
+        async function createHabit() {
+            const nameInput = document.getElementById('habitName');
+            const createBtn = document.getElementById('habitCreateBtn');
+            const name = nameInput.value.trim();
+            const frequency = document.querySelector('input[name="frequency"]:checked').value;
+
+            if (!name) {
+                showToast('Te rog introdu un nume pentru obișnuință');
+                return;
+            }
+
+            // Disable button during submission (loading state)
+            createBtn.disabled = true;
+            const originalText = createBtn.textContent;
+            createBtn.textContent = 'Se creează...';
+
+            try {
+                const response = await fetch('/api/habits', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ name, frequency })
+                });
+
+                if (response.ok) {
+                    // Clear input field after successful creation
+                    nameInput.value = '';
+                    
+                    hideHabitModal();
+                    showToast('Obișnuință creată cu succes!');
+                    loadHabits();
+                } else {
+                    const error = await response.text();
+                    showToast('Eroare la crearea obișnuinței: ' + error);
+                    
+                    // Re-enable button on error (modal stays open)
+                    createBtn.disabled = false;
+                    createBtn.textContent = originalText;
+                }
+            } catch (error) {
+                showToast('Eroare la conectarea cu serverul');
+                console.error(error);
+                
+                // Re-enable button on error (modal stays open)
+                createBtn.disabled = false;
+                createBtn.textContent = originalText;
+            }
+        }
+
+        // Toast notification
+        function showToast(message) {
+            const toast = document.getElementById('toast');
+            toast.textContent = message;
+            toast.classList.add('show');
+            setTimeout(() => {
+                toast.classList.remove('show');
+            }, 3000);
+        }
+
+        // Load habits from API
+        async function loadHabits() {
+            const loadingState = document.getElementById('loadingState');
+            const errorState = document.getElementById('errorState');
+            const emptyState = document.getElementById('emptyState');
+            const habitsList = document.getElementById('habitsList');
+
+            // Show loading state
+            loadingState.classList.add('active');
+            errorState.classList.remove('active');
+            emptyState.style.display = 'none';
+            habitsList.style.display = 'none';
+
+            try {
+                const response = await fetch('/api/habits');
+                
+                if (!response.ok) {
+                    throw new Error('Failed to fetch habits');
+                }
+
+                const data = await response.json();
+                const habits = data.habits || [];
+
+                // Hide loading state
+                loadingState.classList.remove('active');
+
+                // Sort habits by streak descending (highest first)
+                habits.sort((a, b) => (b.streak || 0) - (a.streak || 0));
+
+                if (habits.length === 0) {
+                    // Show empty state
+                    emptyState.style.display = 'block';
+                } else {
+                    // Render habits list
+                    habitsList.innerHTML = '';
+                    habits.forEach(habit => {
+                        const card = createHabitCard(habit);
+                        habitsList.appendChild(card);
+                    });
+                    habitsList.style.display = 'flex';
+                }
+
+                // Re-initialize Lucide icons
+                lucide.createIcons();
+
+            } catch (error) {
+                console.error('Error loading habits:', error);
+                loadingState.classList.remove('active');
+                errorState.classList.add('active');
+            }
+        }
+
+        // Create habit card element
+        function createHabitCard(habit) {
+            const card = document.createElement('div');
+            card.className = 'habit-card';
+
+            // Determine icon based on frequency
+            const iconName = habit.frequency === 'daily' ? 'calendar' : 'clock';
+
+            // Checkbox state
+            const isChecked = habit.checkedToday || false;
+            const checkboxClass = isChecked ? 'habit-checkbox checked disabled' : 'habit-checkbox';
+            const checkIcon = isChecked ? '<i data-lucide="check"></i>' : '';
+
+            // Create card HTML
+            card.innerHTML = `
+                <div class="${checkboxClass}" data-habit-id="${habit.id}" onclick="checkHabit('${habit.id}', this)">
+                    ${checkIcon}
+                </div>
+                <div class="habit-icon">
+                    <i data-lucide="${iconName}"></i>
+                </div>
+                <div class="habit-info">
+                    <div class="habit-name">${escapeHtml(habit.name)}</div>
+                    <div class="habit-frequency">${habit.frequency === 'daily' ? 'Zilnic' : 'Săptămânal'}</div>
+                </div>
+                <div class="habit-streak">
+                    <span id="streak-${habit.id}">${habit.streak || 0}</span>
+                    <span>🔥</span>
+                </div>
+            `;
+
+            return card;
+        }
+
+        // Escape HTML to prevent XSS
+        function escapeHtml(text) {
+            const div = document.createElement('div');
+            div.textContent = text;
+            return div.innerHTML;
+        }
+
+        // Check habit (mark as done for today)
+        async function checkHabit(habitId, checkboxElement) {
+            // Don't allow checking if already checked
+            if (checkboxElement.classList.contains('disabled')) {
+                return;
+            }
+
+            // Optimistic UI update
+            checkboxElement.classList.add('checked', 'disabled');
+            checkboxElement.innerHTML = '<i data-lucide="check"></i>';
+            lucide.createIcons();
+
+            // Store original state for rollback
+            const originalCheckbox = checkboxElement.cloneNode(true);
+            const streakElement = document.getElementById(`streak-${habitId}`);
+            const originalStreak = streakElement ? streakElement.textContent : '0';
+
+            try {
+                const response = await fetch(`/api/habits/${habitId}/check`, {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' }
+                });
+
+                if (!response.ok) {
+                    throw new Error('Failed to check habit');
+                }
+
+                const data = await response.json();
+
+                // Update streak with server value
+                if (streakElement && data.habit && data.habit.streak !== undefined) {
+                    streakElement.textContent = data.habit.streak;
+                }
+
+                showToast('Obișnuință bifată! 🎉');
+
+            } catch (error) {
+                console.error('Error checking habit:', error);
+                
+                // Revert checkbox on error
+                checkboxElement.classList.remove('checked', 'disabled');
+                checkboxElement.innerHTML = '';
+                
+                // Revert streak
+                if (streakElement) {
+                    streakElement.textContent = originalStreak;
+                }
+
+                showToast('Eroare la bifarea obișnuinței. Încearcă din nou.');
+            }
+        }
+
+        // Load habits on page load
+        document.addEventListener('DOMContentLoaded', () => {
+            loadHabits();
+        });
+    </script>
+</body>
+</html>

dashboard/habits.json

@@ -0,0 +1,4 @@
+{
+  "habits": [],
+  "lastUpdated": "2026-02-10T12:39:00Z"
+}

dashboard/test_habits_api.py

@@ -0,0 +1,207 @@
+#!/usr/bin/env python3
+"""
+Tests for GET /api/habits endpoint.
+Validates API response structure, status codes, and error handling.
+"""
+
+import json
+import urllib.request
+import urllib.error
+from pathlib import Path
+from datetime import datetime
+
+# API endpoint - assumes server is running on localhost:8088
+API_BASE = 'http://localhost:8088'
+HABITS_FILE = Path(__file__).parent / 'habits.json'
+
+
+def test_habits_endpoint_exists():
+    """Test that GET /api/habits endpoint exists and returns 200."""
+    print("Testing endpoint exists and returns 200...")
+    
+    try:
+        response = urllib.request.urlopen(f'{API_BASE}/api/habits', timeout=5)
+        status_code = response.getcode()
+        
+        assert status_code == 200, f"Expected status 200, got {status_code}"
+        print("✓ Endpoint returns 200 status")
+    except urllib.error.HTTPError as e:
+        raise AssertionError(f"Endpoint returned HTTP {e.code}: {e.reason}")
+    except urllib.error.URLError as e:
+        raise AssertionError(f"Could not connect to API server: {e.reason}")
+
+
+def test_habits_response_is_json():
+    """Test that response is valid JSON."""
+    print("Testing response is valid JSON...")
+    
+    try:
+        response = urllib.request.urlopen(f'{API_BASE}/api/habits', timeout=5)
+        content = response.read().decode('utf-8')
+        
+        try:
+            data = json.loads(content)
+            print("✓ Response is valid JSON")
+            return data
+        except json.JSONDecodeError as e:
+            raise AssertionError(f"Response is not valid JSON: {e}")
+    except urllib.error.URLError as e:
+        raise AssertionError(f"Could not connect to API server: {e.reason}")
+
+
+def test_habits_response_structure():
+    """Test that response has correct structure: habits array and lastUpdated."""
+    print("Testing response structure...")
+    
+    data = test_habits_response_is_json()
+    
+    # Check for habits array
+    assert 'habits' in data, "Response missing 'habits' field"
+    assert isinstance(data['habits'], list), "'habits' field must be an array"
+    print("✓ Response contains 'habits' array")
+    
+    # Check for lastUpdated timestamp
+    assert 'lastUpdated' in data, "Response missing 'lastUpdated' field"
+    print("✓ Response contains 'lastUpdated' field")
+
+
+def test_habits_lastupdated_is_iso():
+    """Test that lastUpdated is a valid ISO timestamp."""
+    print("Testing lastUpdated is valid ISO timestamp...")
+    
+    data = test_habits_response_is_json()
+    last_updated = data.get('lastUpdated')
+    
+    assert last_updated, "lastUpdated field is empty"
+    
+    try:
+        # Try to parse as ISO datetime
+        dt = datetime.fromisoformat(last_updated.replace('Z', '+00:00'))
+        print(f"✓ lastUpdated is valid ISO timestamp: {last_updated}")
+    except (ValueError, AttributeError) as e:
+        raise AssertionError(f"lastUpdated is not a valid ISO timestamp: {e}")
+
+
+def test_empty_habits_returns_empty_array():
+    """Test that empty habits.json returns empty array, not error."""
+    print("Testing empty habits file returns empty array...")
+    
+    # Backup original file
+    backup = None
+    if HABITS_FILE.exists():
+        backup = HABITS_FILE.read_text()
+    
+    try:
+        # Write empty habits file
+        HABITS_FILE.write_text(json.dumps({
+            'lastUpdated': datetime.now().isoformat(),
+            'habits': []
+        }))
+        
+        # Request habits
+        response = urllib.request.urlopen(f'{API_BASE}/api/habits', timeout=5)
+        data = json.loads(response.read().decode('utf-8'))
+        
+        assert data['habits'] == [], "Empty habits.json should return empty array"
+        print("✓ Empty habits.json returns empty array (not error)")
+        
+    finally:
+        # Restore backup
+        if backup:
+            HABITS_FILE.write_text(backup)
+
+
+def test_habits_with_data():
+    """Test that habits with data are returned correctly."""
+    print("Testing habits with data are returned...")
+    
+    # Backup original file
+    backup = None
+    if HABITS_FILE.exists():
+        backup = HABITS_FILE.read_text()
+    
+    try:
+        # Write test habits
+        test_data = {
+            'lastUpdated': '2026-02-10T10:00:00.000Z',
+            'habits': [
+                {
+                    'id': 'test-habit-1',
+                    'name': 'Bazin',
+                    'frequency': 'daily',
+                    'createdAt': '2026-02-10T10:00:00.000Z',
+                    'completions': ['2026-02-10T10:00:00.000Z']
+                }
+            ]
+        }
+        HABITS_FILE.write_text(json.dumps(test_data, indent=2))
+        
+        # Request habits
+        response = urllib.request.urlopen(f'{API_BASE}/api/habits', timeout=5)
+        data = json.loads(response.read().decode('utf-8'))
+        
+        assert len(data['habits']) == 1, "Should return 1 habit"
+        habit = data['habits'][0]
+        assert habit['name'] == 'Bazin', f"Expected habit name 'Bazin', got '{habit['name']}'"
+        assert habit['frequency'] == 'daily', f"Expected frequency 'daily', got '{habit['frequency']}'"
+        print("✓ Habits with data are returned correctly")
+        
+    finally:
+        # Restore backup
+        if backup:
+            HABITS_FILE.write_text(backup)
+
+
+def run_all_tests():
+    """Run all tests and report results."""
+    print("=" * 60)
+    print("Running GET /api/habits endpoint tests")
+    print("=" * 60)
+    print()
+    
+    tests = [
+        test_habits_endpoint_exists,
+        test_habits_response_is_json,
+        test_habits_response_structure,
+        test_habits_lastupdated_is_iso,
+        test_empty_habits_returns_empty_array,
+        test_habits_with_data,
+    ]
+    
+    passed = 0
+    failed = 0
+    
+    for test in tests:
+        try:
+            test()
+            passed += 1
+            print()
+        except AssertionError as e:
+            print(f"✗ FAILED: {e}")
+            print()
+            failed += 1
+        except Exception as e:
+            print(f"✗ ERROR: {e}")
+            print()
+            failed += 1
+    
+    print("=" * 60)
+    print(f"Results: {passed} passed, {failed} failed")
+    print("=" * 60)
+    
+    return failed == 0
+
+
+if __name__ == '__main__':
+    import sys
+    
+    # Check if API server is running
+    try:
+        urllib.request.urlopen(f'{API_BASE}/api/status', timeout=2)
+    except urllib.error.URLError:
+        print("ERROR: API server is not running on localhost:8088")
+        print("Start the server with: python3 dashboard/api.py")
+        sys.exit(1)
+    
+    success = run_all_tests()
+    sys.exit(0 if success else 1)

dashboard/test_habits_check.py

@@ -0,0 +1,273 @@
+#!/usr/bin/env python3
+"""
+Tests for POST /api/habits/{id}/check endpoint
+"""
+
+import json
+import sys
+import time
+from datetime import datetime, timedelta
+from pathlib import Path
+from http.client import HTTPConnection
+
+# Test against local server
+HOST = 'localhost'
+PORT = 8088
+HABITS_FILE = Path(__file__).parent / 'habits.json'
+
+
+def cleanup_test_habits():
+    """Reset habits.json to empty state for testing."""
+    data = {
+        'lastUpdated': datetime.now().isoformat(),
+        'habits': []
+    }
+    HABITS_FILE.write_text(json.dumps(data, indent=2))
+
+
+def create_test_habit(name='Test Habit', frequency='daily'):
+    """Helper to create a test habit and return its ID."""
+    conn = HTTPConnection(HOST, PORT)
+    payload = json.dumps({'name': name, 'frequency': frequency})
+    headers = {'Content-Type': 'application/json'}
+    
+    conn.request('POST', '/api/habits', payload, headers)
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    return data['id']
+
+
+def test_check_habit_success():
+    """Test successfully checking a habit for today."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Morning Run', 'daily')
+    
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    assert response.status == 200, f"Expected 200, got {response.status}"
+    assert data['id'] == habit_id, "Habit ID should match"
+    assert 'completions' in data, "Response should include completions"
+    assert len(data['completions']) == 1, "Should have exactly 1 completion"
+    
+    # Check that completion date is today (YYYY-MM-DD format)
+    today = datetime.now().date().isoformat()
+    assert data['completions'][0] == today, f"Completion should be today's date: {today}"
+    
+    # Check that streak is calculated and included
+    assert 'streak' in data, "Response should include streak"
+    assert data['streak'] == 1, "Streak should be 1 after first check"
+    
+    print("✓ test_check_habit_success")
+
+
+def test_check_habit_already_checked():
+    """Test checking a habit that was already checked today."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Reading', 'daily')
+    
+    # Check it once
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    conn.getresponse().read()
+    conn.close()
+    
+    # Try to check again
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    assert response.status == 400, f"Expected 400, got {response.status}"
+    assert 'error' in data, "Response should include error"
+    assert 'already checked' in data['error'].lower(), "Error should mention already checked"
+    
+    print("✓ test_check_habit_already_checked")
+
+
+def test_check_habit_not_found():
+    """Test checking a non-existent habit."""
+    cleanup_test_habits()
+    
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', '/api/habits/nonexistent-id/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    assert response.status == 404, f"Expected 404, got {response.status}"
+    assert 'error' in data, "Response should include error"
+    
+    print("✓ test_check_habit_not_found")
+
+
+def test_check_habit_persistence():
+    """Test that completions are persisted to habits.json."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Meditation', 'daily')
+    
+    # Check the habit
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    conn.getresponse().read()
+    conn.close()
+    
+    # Read habits.json directly
+    habits_data = json.loads(HABITS_FILE.read_text())
+    habit = next((h for h in habits_data['habits'] if h['id'] == habit_id), None)
+    
+    assert habit is not None, "Habit should exist in file"
+    assert len(habit['completions']) == 1, "Should have 1 completion in file"
+    
+    today = datetime.now().date().isoformat()
+    assert habit['completions'][0] == today, "Completion date should be today"
+    
+    print("✓ test_check_habit_persistence")
+
+
+def test_check_habit_sorted_completions():
+    """Test that completions array is sorted chronologically."""
+    cleanup_test_habits()
+    
+    # Create a habit and manually add out-of-order completions
+    habit_id = create_test_habit('Workout', 'daily')
+    
+    # Manually add past completions in reverse order
+    habits_data = json.loads(HABITS_FILE.read_text())
+    habit = next((h for h in habits_data['habits'] if h['id'] == habit_id), None)
+    
+    today = datetime.now().date()
+    habit['completions'] = [
+        (today - timedelta(days=2)).isoformat(),  # 2 days ago
+        (today - timedelta(days=4)).isoformat(),  # 4 days ago
+        (today - timedelta(days=1)).isoformat(),  # yesterday
+    ]
+    HABITS_FILE.write_text(json.dumps(habits_data, indent=2))
+    
+    # Check today
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    # Verify completions are sorted oldest first
+    expected_order = [
+        (today - timedelta(days=4)).isoformat(),
+        (today - timedelta(days=2)).isoformat(),
+        (today - timedelta(days=1)).isoformat(),
+        today.isoformat()
+    ]
+    
+    assert data['completions'] == expected_order, f"Completions should be sorted. Got: {data['completions']}"
+    
+    print("✓ test_check_habit_sorted_completions")
+
+
+def test_check_habit_streak_calculation():
+    """Test that streak is calculated correctly after checking."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Journaling', 'daily')
+    
+    # Add consecutive past completions
+    today = datetime.now().date()
+    habits_data = json.loads(HABITS_FILE.read_text())
+    habit = next((h for h in habits_data['habits'] if h['id'] == habit_id), None)
+    
+    habit['completions'] = [
+        (today - timedelta(days=2)).isoformat(),
+        (today - timedelta(days=1)).isoformat(),
+    ]
+    HABITS_FILE.write_text(json.dumps(habits_data, indent=2))
+    
+    # Check today
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    # Streak should be 3 (today + yesterday + day before)
+    assert data['streak'] == 3, f"Expected streak 3, got {data['streak']}"
+    
+    print("✓ test_check_habit_streak_calculation")
+
+
+def test_check_weekly_habit():
+    """Test checking a weekly habit."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Team Meeting', 'weekly')
+    
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    assert response.status == 200, f"Expected 200, got {response.status}"
+    assert len(data['completions']) == 1, "Should have 1 completion"
+    assert data['streak'] == 1, "Weekly habit should have streak of 1"
+    
+    print("✓ test_check_weekly_habit")
+
+
+def test_check_habit_iso_date_format():
+    """Test that completion dates use ISO YYYY-MM-DD format (not timestamps)."""
+    cleanup_test_habits()
+    habit_id = create_test_habit('Water Plants', 'daily')
+    
+    conn = HTTPConnection(HOST, PORT)
+    conn.request('POST', f'/api/habits/{habit_id}/check')
+    response = conn.getresponse()
+    data = json.loads(response.read().decode())
+    conn.close()
+    
+    completion = data['completions'][0]
+    
+    # Verify format is YYYY-MM-DD (exactly 10 chars, 2 dashes)
+    assert len(completion) == 10, f"Date should be 10 chars, got {len(completion)}"
+    assert completion.count('-') == 2, "Date should have 2 dashes"
+    assert 'T' not in completion, "Date should not include time (no T)"
+    
+    # Verify it parses as a valid date
+    try:
+        datetime.fromisoformat(completion)
+    except ValueError:
+        assert False, f"Completion date should be valid ISO date: {completion}"
+    
+    print("✓ test_check_habit_iso_date_format")
+
+
+if __name__ == '__main__':
+    print("Running tests for POST /api/habits/{id}/check...")
+    print()
+    
+    try:
+        test_check_habit_success()
+        test_check_habit_already_checked()
+        test_check_habit_not_found()
+        test_check_habit_persistence()
+        test_check_habit_sorted_completions()
+        test_check_habit_streak_calculation()
+        test_check_weekly_habit()
+        test_check_habit_iso_date_format()
+        
+        print()
+        print("✅ All tests passed!")
+        sys.exit(0)
+    except AssertionError as e:
+        print()
+        print(f"❌ Test failed: {e}")
+        sys.exit(1)
+    except Exception as e:
+        print()
+        print(f"❌ Error running tests: {e}")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)

dashboard/test_habits_check_ui.py

@@ -0,0 +1,222 @@
+#!/usr/bin/env python3
+"""
+Tests for Story 10.0: Frontend - Check habit interaction
+"""
+
+import sys
+import re
+
+def load_html():
+    """Load habits.html content"""
+    try:
+        with open('dashboard/habits.html', 'r', encoding='utf-8') as f:
+            return f.read()
+    except FileNotFoundError:
+        print("ERROR: dashboard/habits.html not found")
+        sys.exit(1)
+
+def test_checkbox_css_exists():
+    """Test that checkbox CSS styles are defined"""
+    html = load_html()
+    
+    # Check for checkbox class
+    assert '.habit-checkbox' in html, "Missing .habit-checkbox CSS class"
+    
+    # Check for circular shape (border-radius: 50%)
+    assert 'border-radius: 50%' in html, "Checkbox should be circular (border-radius: 50%)"
+    
+    # Check for checked state
+    assert '.habit-checkbox.checked' in html, "Missing .habit-checkbox.checked CSS"
+    
+    # Check for disabled state
+    assert '.habit-checkbox.disabled' in html, "Missing .habit-checkbox.disabled CSS"
+    
+    # Check for hover state
+    assert '.habit-checkbox:hover' in html, "Missing .habit-checkbox:hover CSS"
+    
+    print("✓ Checkbox CSS styles exist")
+
+def test_checkbox_in_habit_card():
+    """Test that createHabitCard includes checkbox"""
+    html = load_html()
+    
+    # Check that createHabitCard creates a checkbox element
+    assert 'habit-checkbox' in html, "createHabitCard should include checkbox element"
+    
+    # Check for data-habit-id attribute
+    assert 'data-habit-id' in html, "Checkbox should have data-habit-id attribute"
+    
+    # Check for onclick handler
+    assert 'onclick="checkHabit' in html, "Checkbox should have onclick='checkHabit' handler"
+    
+    print("✓ Checkbox is included in habit card")
+
+def test_checkbox_checked_state():
+    """Test that checkbox uses checkedToday to determine state"""
+    html = load_html()
+    
+    # Look for logic that checks habit.checkedToday
+    assert 'checkedToday' in html, "Should check habit.checkedToday property"
+    
+    # Check for conditional checked class
+    assert 'checked' in html, "Should add 'checked' class when checkedToday is true"
+    
+    # Check for check icon
+    assert 'data-lucide="check"' in html, "Should show check icon when checked"
+    
+    print("✓ Checkbox state reflects checkedToday")
+
+def test_check_habit_function_exists():
+    """Test that checkHabit function is defined"""
+    html = load_html()
+    
+    # Check for function definition
+    assert 'function checkHabit' in html or 'async function checkHabit' in html, \
+        "checkHabit function should be defined"
+    
+    # Check for parameters
+    assert re.search(r'function checkHabit\s*\(\s*habitId', html) or \
+           re.search(r'async function checkHabit\s*\(\s*habitId', html), \
+        "checkHabit should accept habitId parameter"
+    
+    print("✓ checkHabit function exists")
+
+def test_check_habit_api_call():
+    """Test that checkHabit calls POST /api/habits/{id}/check"""
+    html = load_html()
+    
+    # Check for fetch call
+    assert 'fetch(' in html, "checkHabit should use fetch API"
+    
+    # Check for POST method
+    assert "'POST'" in html or '"POST"' in html, "checkHabit should use POST method"
+    
+    # Check for /api/habits/ endpoint
+    assert '/api/habits/' in html, "Should call /api/habits/{id}/check endpoint"
+    
+    # Check for /check path
+    assert '/check' in html, "Should call endpoint with /check path"
+    
+    print("✓ checkHabit calls POST /api/habits/{id}/check")
+
+def test_optimistic_ui_update():
+    """Test that checkbox updates immediately (optimistic)"""
+    html = load_html()
+    
+    # Check for classList.add before fetch
+    # The pattern should be: add 'checked' class, then fetch
+    checkHabitFunc = html[html.find('async function checkHabit'):html.find('async function checkHabit') + 2000]
+    
+    # Check for immediate classList modification
+    assert 'classList.add' in checkHabitFunc, "Should add class immediately (optimistic update)"
+    assert "'checked'" in checkHabitFunc or '"checked"' in checkHabitFunc, \
+        "Should add 'checked' class optimistically"
+    
+    print("✓ Optimistic UI update implemented")
+
+def test_error_handling_revert():
+    """Test that checkbox reverts on error"""
+    html = load_html()
+    
+    # Check for catch block
+    assert 'catch' in html, "checkHabit should have error handling (catch)"
+    
+    # Check for classList.remove in error handler
+    checkHabitFunc = html[html.find('async function checkHabit'):]
+    
+    # Find the catch block
+    if 'catch' in checkHabitFunc:
+        catchBlock = checkHabitFunc[checkHabitFunc.find('catch'):]
+        
+        # Check for revert logic
+        assert 'classList.remove' in catchBlock, "Should revert checkbox on error"
+        assert "'checked'" in catchBlock or '"checked"' in catchBlock, \
+            "Should remove 'checked' class on error"
+    
+    print("✓ Error handling reverts checkbox")
+
+def test_disabled_when_checked():
+    """Test that checkbox is disabled when already checked"""
+    html = load_html()
+    
+    # Check for disabled class on checked habits
+    assert 'disabled' in html, "Should add 'disabled' class to checked habits"
+    
+    # Check for early return if disabled
+    checkHabitFunc = html[html.find('async function checkHabit'):html.find('async function checkHabit') + 1000]
+    assert 'disabled' in checkHabitFunc, "Should check if checkbox is disabled"
+    assert 'return' in checkHabitFunc, "Should return early if disabled"
+    
+    print("✓ Checkbox disabled when already checked")
+
+def test_streak_updates():
+    """Test that streak updates after successful check"""
+    html = load_html()
+    
+    # Check for streak element ID
+    assert 'streak-' in html, "Should use ID for streak element (e.g., streak-${habit.id})"
+    
+    # Check for getElementById to update streak
+    checkHabitFunc = html[html.find('async function checkHabit'):]
+    assert 'getElementById' in checkHabitFunc or 'getElementById' in html, \
+        "Should get streak element by ID to update it"
+    
+    # Check that response data is used to update streak
+    assert '.streak' in checkHabitFunc or 'streak' in checkHabitFunc, \
+        "Should update streak from response data"
+    
+    print("✓ Streak updates after successful check")
+
+def test_check_icon_display():
+    """Test that check icon is shown when checked"""
+    html = load_html()
+    
+    # Check for lucide check icon
+    assert 'data-lucide="check"' in html, "Should use lucide check icon"
+    
+    # Check that icon is created/shown after checking
+    checkHabitFunc = html[html.find('async function checkHabit'):html.find('async function checkHabit') + 1500]
+    assert 'lucide.createIcons()' in checkHabitFunc, \
+        "Should reinitialize lucide icons after adding check icon"
+    
+    print("✓ Check icon displays correctly")
+
+def main():
+    """Run all tests"""
+    print("Running Story 10.0 Frontend Check Interaction Tests...\n")
+    
+    tests = [
+        test_checkbox_css_exists,
+        test_checkbox_in_habit_card,
+        test_checkbox_checked_state,
+        test_check_habit_function_exists,
+        test_check_habit_api_call,
+        test_optimistic_ui_update,
+        test_error_handling_revert,
+        test_disabled_when_checked,
+        test_streak_updates,
+        test_check_icon_display,
+    ]
+    
+    passed = 0
+    failed = 0
+    
+    for test in tests:
+        try:
+            test()
+            passed += 1
+        except AssertionError as e:
+            print(f"✗ {test.__name__}: {e}")
+            failed += 1
+        except Exception as e:
+            print(f"✗ {test.__name__}: Unexpected error: {e}")
+            failed += 1
+    
+    print(f"\n{'='*50}")
+    print(f"Results: {passed} passed, {failed} failed")
+    print(f"{'='*50}")
+    
+    return 0 if failed == 0 else 1
+
+if __name__ == '__main__':
+    sys.exit(main())

dashboard/test_habits_display.py

@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+"""
+Tests for Story 9.0: Frontend - Display habits list
+"""
+import re
+
+def read_file(path):
+    with open(path, 'r', encoding='utf-8') as f:
+        return f.read()
+
+def test_loading_state_structure():
+    """Test loading state HTML structure exists"""
+    html = read_file('dashboard/habits.html')
+    assert 'id="loadingState"' in html, "Loading state element missing"
+    assert 'class="loading-state"' in html, "Loading state class missing"
+    assert 'data-lucide="loader"' in html, "Loading state loader icon missing"
+    assert 'Se încarcă obiceiurile' in html, "Loading state message missing"
+    print("✓ Loading state structure exists")
+
+def test_error_state_structure():
+    """Test error state HTML structure exists"""
+    html = read_file('dashboard/habits.html')
+    assert 'id="errorState"' in html, "Error state element missing"
+    assert 'class="error-state"' in html, "Error state class missing"
+    assert 'data-lucide="alert-circle"' in html, "Error state alert icon missing"
+    assert 'Eroare la încărcarea obiceiurilor' in html, "Error state message missing"
+    assert 'onclick="loadHabits()"' in html, "Retry button missing"
+    print("✓ Error state structure exists")
+
+def test_empty_state_has_id():
+    """Test empty state has id for JavaScript access"""
+    html = read_file('dashboard/habits.html')
+    assert 'id="emptyState"' in html, "Empty state id missing"
+    print("✓ Empty state has id attribute")
+
+def test_habits_list_container():
+    """Test habits list container exists"""
+    html = read_file('dashboard/habits.html')
+    assert 'id="habitsList"' in html, "Habits list container missing"
+    assert 'class="habits-list"' in html, "Habits list class missing"
+    print("✓ Habits list container exists")
+
+def test_loadhabits_function_exists():
+    """Test loadHabits function is implemented"""
+    html = read_file('dashboard/habits.html')
+    assert 'async function loadHabits()' in html, "loadHabits function not implemented"
+    assert 'await fetch(\'/api/habits\')' in html, "API fetch call missing"
+    print("✓ loadHabits function exists and fetches API")
+
+def test_sorting_by_streak():
+    """Test habits are sorted by streak descending"""
+    html = read_file('dashboard/habits.html')
+    assert 'habits.sort(' in html, "Sorting logic missing"
+    assert 'streak' in html and '.sort(' in html, "Sort by streak missing"
+    # Check for descending order (b.streak - a.streak pattern)
+    assert re.search(r'b\.streak.*-.*a\.streak', html), "Descending sort pattern missing"
+    print("✓ Habits sorted by streak descending")
+
+def test_frequency_icons():
+    """Test frequency icons (calendar for daily, clock for weekly)"""
+    html = read_file('dashboard/habits.html')
+    assert 'calendar' in html, "Calendar icon for daily habits missing"
+    assert 'clock' in html, "Clock icon for weekly habits missing"
+    # Check icon assignment logic
+    assert 'daily' in html and 'calendar' in html, "Daily -> calendar mapping missing"
+    assert 'weekly' in html and 'clock' in html, "Weekly -> clock mapping missing"
+    print("✓ Frequency icons implemented (calendar/clock)")
+
+def test_streak_display_with_flame():
+    """Test streak display includes flame emoji"""
+    html = read_file('dashboard/habits.html')
+    assert '🔥' in html, "Flame emoji missing from streak display"
+    assert 'habit-streak' in html, "Habit streak class missing"
+    print("✓ Streak displays with flame emoji 🔥")
+
+def test_show_hide_states():
+    """Test state management (loading, error, empty, list)"""
+    html = read_file('dashboard/habits.html')
+    # Check for state toggling logic
+    assert 'loadingState.classList.add(\'active\')' in html or \
+           'loadingState.classList.add("active")' in html, "Loading state show missing"
+    assert 'errorState.classList.remove(\'active\')' in html or \
+           'errorState.classList.remove("active")' in html, "Error state hide missing"
+    assert 'emptyState.style.display' in html, "Empty state toggle missing"
+    assert 'habitsList.style.display' in html, "Habits list toggle missing"
+    print("✓ State management implemented")
+
+def test_error_handling():
+    """Test error handling shows error state"""
+    html = read_file('dashboard/habits.html')
+    assert 'catch' in html, "Error handling missing"
+    assert 'errorState.classList.add(\'active\')' in html or \
+           'errorState.classList.add("active")' in html, "Error state activation missing"
+    print("✓ Error handling implemented")
+
+def test_createhabitcard_function():
+    """Test createHabitCard function exists"""
+    html = read_file('dashboard/habits.html')
+    assert 'function createHabitCard(' in html, "createHabitCard function missing"
+    assert 'habit.name' in html, "Habit name rendering missing"
+    assert 'habit.frequency' in html, "Habit frequency rendering missing"
+    assert 'habit.streak' in html, "Habit streak rendering missing"
+    print("✓ createHabitCard function exists")
+
+def test_page_load_trigger():
+    """Test loadHabits is called on page load"""
+    html = read_file('dashboard/habits.html')
+    assert 'DOMContentLoaded' in html, "DOMContentLoaded listener missing"
+    assert 'loadHabits()' in html, "loadHabits call missing"
+    print("✓ loadHabits called on page load")
+
+def test_habit_card_css():
+    """Test habit card CSS styling exists"""
+    html = read_file('dashboard/habits.html')
+    assert '.habit-card' in html, "Habit card CSS missing"
+    assert '.habit-icon' in html, "Habit icon CSS missing"
+    assert '.habit-info' in html, "Habit info CSS missing"
+    assert '.habit-name' in html, "Habit name CSS missing"
+    assert '.habit-frequency' in html, "Habit frequency CSS missing"
+    assert '.habit-streak' in html, "Habit streak CSS missing"
+    print("✓ Habit card CSS styling exists")
+
+def test_lucide_icons_reinitialized():
+    """Test Lucide icons are reinitialized after rendering"""
+    html = read_file('dashboard/habits.html')
+    assert 'lucide.createIcons()' in html, "Lucide icons initialization missing"
+    # Check it's called after rendering habits
+    assert html.index('habitsList.appendChild') < html.rindex('lucide.createIcons()'), \
+           "Lucide icons not reinitialized after rendering"
+    print("✓ Lucide icons reinitialized after rendering")
+
+def test_xss_protection():
+    """Test HTML escaping for XSS protection"""
+    html = read_file('dashboard/habits.html')
+    assert 'escapeHtml' in html, "HTML escaping function missing"
+    assert 'textContent' in html or 'innerText' in html, "Text content method missing"
+    print("✓ XSS protection implemented")
+
+if __name__ == '__main__':
+    tests = [
+        test_loading_state_structure,
+        test_error_state_structure,
+        test_empty_state_has_id,
+        test_habits_list_container,
+        test_loadhabits_function_exists,
+        test_sorting_by_streak,
+        test_frequency_icons,
+        test_streak_display_with_flame,
+        test_show_hide_states,
+        test_error_handling,
+        test_createhabitcard_function,
+        test_page_load_trigger,
+        test_habit_card_css,
+        test_lucide_icons_reinitialized,
+        test_xss_protection,
+    ]
+    
+    failed = 0
+    for test in tests:
+        try:
+            test()
+        except AssertionError as e:
+            print(f"✗ {test.__name__}: {e}")
+            failed += 1
+        except Exception as e:
+            print(f"✗ {test.__name__}: Unexpected error: {e}")
+            failed += 1
+    
+    print(f"\n{'='*50}")
+    print(f"Tests: {len(tests)} total, {len(tests)-failed} passed, {failed} failed")
+    if failed == 0:
+        print("✓ All Story 9.0 tests passed!")
+    exit(failed)

dashboard/test_habits_form_submit.py

@@ -0,0 +1,209 @@
+#!/usr/bin/env python3
+"""
+Tests for Story 11.0: Frontend - Create habit from form
+
+Acceptance Criteria:
+  1. Form submit calls POST /api/habits with name and frequency
+  2. Shows loading state on submit (button disabled)
+  3. On success: modal closes, list refreshes, new habit appears
+  4. On error: shows error message in modal, modal stays open
+  5. Input field cleared after successful creation
+  6. Tests for form submission pass
+"""
+
+import os
+import sys
+
+def test_form_submit_api_call():
+    """Test that createHabit calls POST /api/habits with correct data"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check that createHabit function exists
+    assert 'async function createHabit()' in html, "createHabit function should exist"
+    
+    # Check that it calls POST /api/habits
+    assert "fetch('/api/habits'" in html, "Should fetch /api/habits endpoint"
+    assert "method: 'POST'" in html, "Should use POST method"
+    
+    # Check that it sends name and frequency in JSON body
+    assert "body: JSON.stringify({ name, frequency })" in html, "Should send name and frequency in request body"
+    
+    # Check that frequency is read from checked radio button
+    assert "document.querySelector('input[name=\"frequency\"]:checked').value" in html, "Should read frequency from radio buttons"
+    
+    print("✓ Form submission calls POST /api/habits with name and frequency")
+
+def test_loading_state_on_submit():
+    """Test that button is disabled during submission"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check that createBtn is referenced
+    assert "createBtn = document.getElementById('habitCreateBtn')" in html, "Should get create button element"
+    
+    # Check that button is disabled before fetch
+    assert "createBtn.disabled = true" in html, "Button should be disabled during submission"
+    
+    # Check that button text changes to loading state
+    assert "createBtn.textContent = 'Se creează...'" in html or "Se creează" in html, "Should show loading text during submission"
+    
+    # Check that original text is stored for restoration
+    assert "originalText = createBtn.textContent" in html, "Should store original button text"
+    
+    print("✓ Shows loading state on submit (button disabled)")
+
+def test_success_behavior():
+    """Test behavior on successful habit creation"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check for success handling block
+    assert "if (response.ok)" in html, "Should check for successful response"
+    
+    # Check that modal closes on success
+    assert "hideHabitModal()" in html, "Modal should close on success"
+    
+    # Check that habits list is refreshed
+    assert "loadHabits()" in html, "Should reload habits list on success"
+    
+    # Check that success toast is shown
+    assert "showToast(" in html and "succes" in html, "Should show success toast"
+    
+    print("✓ On success: modal closes, list refreshes, new habit appears")
+
+def test_error_behavior():
+    """Test behavior on error (modal stays open, shows error)"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check for error handling in response
+    assert "else {" in html or "!response.ok" in html, "Should handle error responses"
+    
+    # Check for catch block for network errors
+    assert "catch (error)" in html, "Should catch network errors"
+    
+    # Check that error toast is shown
+    assert "showToast('Eroare" in html, "Should show error toast on failure"
+    
+    # Check that button is re-enabled on error (so modal stays usable)
+    createHabit_block = html[html.find('async function createHabit()'):html.find('async function createHabit()') + 2000]
+    
+    # Count occurrences of button re-enable in error paths
+    error_section = html[html.find('} else {'):html.find('} catch (error)') + 500]
+    assert 'createBtn.disabled = false' in error_section, "Button should be re-enabled on error"
+    assert 'createBtn.textContent = originalText' in error_section, "Button text should be restored on error"
+    
+    print("✓ On error: shows error message, modal stays open (button re-enabled)")
+
+def test_input_cleared_after_success():
+    """Test that input field is cleared after successful creation"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Find the success block
+    success_section = html[html.find('if (response.ok)'):html.find('if (response.ok)') + 500]
+    
+    # Check that nameInput.value is cleared
+    assert "nameInput.value = ''" in success_section or 'nameInput.value = ""' in success_section, \
+        "Input field should be cleared after successful creation"
+    
+    print("✓ Input field cleared after successful creation")
+
+def test_form_validation_still_works():
+    """Test that existing form validation is still in place"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check that empty name validation exists
+    assert "if (!name)" in html, "Should validate for empty name"
+    assert "name = nameInput.value.trim()" in html, "Should trim name before validation"
+    
+    # Check that create button is disabled when name is empty
+    assert "nameInput.addEventListener('input'" in html, "Should listen to input changes"
+    assert "createBtn.disabled = name.length === 0" in html, "Button should be disabled when name is empty"
+    
+    print("✓ Form validation still works (empty name check)")
+
+def test_modal_reset_on_open():
+    """Test that modal resets form when opened"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check showAddHabitModal function
+    assert 'function showAddHabitModal()' in html, "showAddHabitModal function should exist"
+    
+    # Check that form is reset when modal opens
+    modal_function = html[html.find('function showAddHabitModal()'):html.find('function showAddHabitModal()') + 500]
+    assert "nameInput.value = ''" in modal_function or 'nameInput.value = ""' in modal_function, \
+        "Should clear name input when opening modal"
+    
+    print("✓ Modal resets form when opened")
+
+def test_enter_key_submission():
+    """Test that Enter key can submit the form"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    # Check for Enter key handler
+    assert "addEventListener('keypress'" in html, "Should listen for keypress events"
+    assert "e.key === 'Enter'" in html, "Should check for Enter key"
+    assert "!createBtn.disabled" in html, "Should check if button is enabled before submitting"
+    assert "createHabit()" in html, "Should call createHabit on Enter"
+    
+    print("✓ Enter key submits form when button is enabled")
+
+def test_all_acceptance_criteria():
+    """Summary test - verify all acceptance criteria are met"""
+    with open('dashboard/habits.html', 'r') as f:
+        html = f.read()
+    
+    checks = [
+        ("'/api/habits'" in html and "method: 'POST'" in html and "body: JSON.stringify({ name, frequency })" in html, 
+         "1. Form submit calls POST /api/habits with name and frequency"),
+        
+        ("createBtn.disabled = true" in html and "Se creează" in html,
+         "2. Shows loading state on submit (button disabled)"),
+        
+        ("hideHabitModal()" in html and "loadHabits()" in html and "response.ok" in html,
+         "3. On success: modal closes, list refreshes, new habit appears"),
+        
+        ("catch (error)" in html and "createBtn.disabled = false" in html,
+         "4. On error: shows error message, modal stays open"),
+        
+        ("nameInput.value = ''" in html or 'nameInput.value = ""' in html,
+         "5. Input field cleared after successful creation"),
+        
+        (True, "6. Tests for form submission pass (this test!)")
+    ]
+    
+    all_pass = True
+    for condition, description in checks:
+        status = "✓" if condition else "✗"
+        print(f"  {status} {description}")
+        if not condition:
+            all_pass = False
+    
+    assert all_pass, "Not all acceptance criteria are met"
+    print("\n✓ All acceptance criteria verified!")
+
+if __name__ == '__main__':
+    try:
+        test_form_submit_api_call()
+        test_loading_state_on_submit()
+        test_success_behavior()
+        test_error_behavior()
+        test_input_cleared_after_success()
+        test_form_validation_still_works()
+        test_modal_reset_on_open()
+        test_enter_key_submission()
+        test_all_acceptance_criteria()
+        
+        print("\n✅ All Story 11.0 tests passed!")
+        sys.exit(0)
+    except AssertionError as e:
+        print(f"\n❌ Test failed: {e}", file=sys.stderr)
+        sys.exit(1)
+    except Exception as e:
+        print(f"\n❌ Unexpected error: {e}", file=sys.stderr)
+        sys.exit(1)

dashboard/test_habits_get_enhanced.py

@@ -0,0 +1,252 @@
+#!/usr/bin/env python3
+"""
+Tests for enhanced GET /api/habits endpoint with streak and checkedToday fields.
+"""
+
+import json
+import sys
+import urllib.request
+from pathlib import Path
+from datetime import datetime, timedelta
+
+BASE_URL = 'http://localhost:8088'
+KANBAN_DIR = Path(__file__).parent
+
+
+def test_habits_get_includes_streak_field():
+    """Test that each habit includes a 'streak' field."""
+    # Create test habit with completions
+    today = datetime.now().date()
+    yesterday = today - timedelta(days=1)
+    two_days_ago = today - timedelta(days=2)
+    
+    test_data = {
+        'habits': [
+            {
+                'id': 'habit-test1',
+                'name': 'Test Habit',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [
+                    two_days_ago.isoformat(),
+                    yesterday.isoformat(),
+                    today.isoformat()
+                ]
+            }
+        ],
+        'lastUpdated': datetime.now().isoformat()
+    }
+    
+    habits_file = KANBAN_DIR / 'habits.json'
+    habits_file.write_text(json.dumps(test_data, indent=2), encoding='utf-8')
+    
+    # Test GET
+    req = urllib.request.Request(f'{BASE_URL}/api/habits')
+    with urllib.request.urlopen(req) as response:
+        result = json.loads(response.read().decode('utf-8'))
+    
+    assert 'habits' in result, "Response should contain habits array"
+    assert len(result['habits']) == 1, "Should have one habit"
+    habit = result['habits'][0]
+    assert 'streak' in habit, "Habit should include 'streak' field"
+    assert isinstance(habit['streak'], int), "Streak should be an integer"
+    assert habit['streak'] == 3, f"Expected streak of 3, got {habit['streak']}"
+    
+    print("✓ Each habit includes 'streak' field")
+
+
+def test_habits_get_includes_checked_today_field():
+    """Test that each habit includes a 'checkedToday' field."""
+    today = datetime.now().date().isoformat()
+    
+    test_data = {
+        'habits': [
+            {
+                'id': 'habit-test1',
+                'name': 'Checked Today',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [today]
+            },
+            {
+                'id': 'habit-test2',
+                'name': 'Not Checked Today',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': ['2026-02-01']
+            }
+        ],
+        'lastUpdated': datetime.now().isoformat()
+    }
+    
+    habits_file = KANBAN_DIR / 'habits.json'
+    habits_file.write_text(json.dumps(test_data, indent=2), encoding='utf-8')
+    
+    # Test GET
+    req = urllib.request.Request(f'{BASE_URL}/api/habits')
+    with urllib.request.urlopen(req) as response:
+        result = json.loads(response.read().decode('utf-8'))
+    
+    assert len(result['habits']) == 2, "Should have two habits"
+    
+    habit1 = result['habits'][0]
+    assert 'checkedToday' in habit1, "Habit should include 'checkedToday' field"
+    assert isinstance(habit1['checkedToday'], bool), "checkedToday should be boolean"
+    assert habit1['checkedToday'] is True, "Habit checked today should have checkedToday=True"
+    
+    habit2 = result['habits'][1]
+    assert 'checkedToday' in habit2, "Habit should include 'checkedToday' field"
+    assert habit2['checkedToday'] is False, "Habit not checked today should have checkedToday=False"
+    
+    print("✓ Each habit includes 'checkedToday' boolean field")
+
+
+def test_habits_get_calculates_streak_correctly():
+    """Test that streak is calculated using the streak utility function."""
+    today = datetime.now().date()
+    yesterday = today - timedelta(days=1)
+    two_days_ago = today - timedelta(days=2)
+    three_days_ago = today - timedelta(days=3)
+    four_days_ago = today - timedelta(days=4)
+    
+    test_data = {
+        'habits': [
+            {
+                'id': 'habit-daily',
+                'name': 'Daily Habit',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [
+                    four_days_ago.isoformat(),
+                    three_days_ago.isoformat(),
+                    two_days_ago.isoformat(),
+                    yesterday.isoformat(),
+                    today.isoformat()
+                ]
+            },
+            {
+                'id': 'habit-broken',
+                'name': 'Broken Streak',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [
+                    four_days_ago.isoformat(),
+                    three_days_ago.isoformat()
+                    # Missing two_days_ago - streak broken
+                ]
+            },
+            {
+                'id': 'habit-weekly',
+                'name': 'Weekly Habit',
+                'frequency': 'weekly',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [
+                    today.isoformat(),
+                    (today - timedelta(days=7)).isoformat(),
+                    (today - timedelta(days=14)).isoformat()
+                ]
+            }
+        ],
+        'lastUpdated': datetime.now().isoformat()
+    }
+    
+    habits_file = KANBAN_DIR / 'habits.json'
+    habits_file.write_text(json.dumps(test_data, indent=2), encoding='utf-8')
+    
+    # Test GET
+    req = urllib.request.Request(f'{BASE_URL}/api/habits')
+    with urllib.request.urlopen(req) as response:
+        result = json.loads(response.read().decode('utf-8'))
+    
+    assert len(result['habits']) == 3, "Should have three habits"
+    
+    daily_habit = result['habits'][0]
+    assert daily_habit['streak'] == 5, f"Expected daily streak of 5, got {daily_habit['streak']}"
+    
+    broken_habit = result['habits'][1]
+    assert broken_habit['streak'] == 0, f"Expected broken streak of 0, got {broken_habit['streak']}"
+    
+    weekly_habit = result['habits'][2]
+    assert weekly_habit['streak'] == 3, f"Expected weekly streak of 3, got {weekly_habit['streak']}"
+    
+    print("✓ Streak is calculated correctly using utility function")
+
+
+def test_habits_get_empty_habits_array():
+    """Test GET with empty habits array."""
+    test_data = {
+        'habits': [],
+        'lastUpdated': datetime.now().isoformat()
+    }
+    
+    habits_file = KANBAN_DIR / 'habits.json'
+    habits_file.write_text(json.dumps(test_data, indent=2), encoding='utf-8')
+    
+    # Test GET
+    req = urllib.request.Request(f'{BASE_URL}/api/habits')
+    with urllib.request.urlopen(req) as response:
+        result = json.loads(response.read().decode('utf-8'))
+    
+    assert result['habits'] == [], "Should return empty array"
+    assert 'lastUpdated' in result, "Should include lastUpdated"
+    
+    print("✓ Empty habits array handled correctly")
+
+
+def test_habits_get_preserves_original_fields():
+    """Test that all original habit fields are preserved."""
+    today = datetime.now().date().isoformat()
+    
+    test_data = {
+        'habits': [
+            {
+                'id': 'habit-test1',
+                'name': 'Test Habit',
+                'frequency': 'daily',
+                'createdAt': '2026-02-01T10:00:00Z',
+                'completions': [today]
+            }
+        ],
+        'lastUpdated': '2026-02-10T10:00:00Z'
+    }
+    
+    habits_file = KANBAN_DIR / 'habits.json'
+    habits_file.write_text(json.dumps(test_data, indent=2), encoding='utf-8')
+    
+    # Test GET
+    req = urllib.request.Request(f'{BASE_URL}/api/habits')
+    with urllib.request.urlopen(req) as response:
+        result = json.loads(response.read().decode('utf-8'))
+    
+    habit = result['habits'][0]
+    assert habit['id'] == 'habit-test1', "Original id should be preserved"
+    assert habit['name'] == 'Test Habit', "Original name should be preserved"
+    assert habit['frequency'] == 'daily', "Original frequency should be preserved"
+    assert habit['createdAt'] == '2026-02-01T10:00:00Z', "Original createdAt should be preserved"
+    assert habit['completions'] == [today], "Original completions should be preserved"
+    assert 'streak' in habit, "Should add streak field"
+    assert 'checkedToday' in habit, "Should add checkedToday field"
+    
+    print("✓ All original habit fields are preserved")
+
+
+if __name__ == '__main__':
+    try:
+        print("\n=== Testing Enhanced GET /api/habits ===\n")
+        
+        test_habits_get_includes_streak_field()
+        test_habits_get_includes_checked_today_field()
+        test_habits_get_calculates_streak_correctly()
+        test_habits_get_empty_habits_array()
+        test_habits_get_preserves_original_fields()
+        
+        print("\n=== All Enhanced GET Tests Passed ✓ ===\n")
+        sys.exit(0)
+    except AssertionError as e:
+        print(f"\n❌ Test failed: {e}\n")
+        sys.exit(1)
+    except Exception as e:
+        print(f"\n❌ Error: {e}\n")
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)

dashboard/test_habits_html.py

@@ -0,0 +1,240 @@
+#!/usr/bin/env python3
+"""
+Test suite for habits.html page structure
+
+Tests:
+1. File exists
+2. Valid HTML5 structure
+3. Uses common.css and swipe-nav.js
+4. Has navigation bar matching dashboard style
+5. Page title 'Habit Tracker' in header
+6. Empty state message 'Nicio obișnuință încă. Creează prima!'
+7. Add habit button with '+' icon (lucide)
+"""
+
+import os
+import re
+from html.parser import HTMLParser
+
+# Path to habits.html
+HABITS_HTML_PATH = 'dashboard/habits.html'
+
+class HTMLStructureParser(HTMLParser):
+    """Parser to extract specific elements from HTML"""
+    def __init__(self):
+        super().__init__()
+        self.title_text = None
+        self.css_files = []
+        self.js_files = []
+        self.nav_items = []
+        self.page_title = None
+        self.empty_state_message = None
+        self.has_add_button = False
+        self.has_lucide_plus = False
+        self.in_title = False
+        self.in_page_title = False
+        self.in_empty_message = False
+        self.in_button = False
+        self.current_class = None
+        
+    def handle_starttag(self, tag, attrs):
+        attrs_dict = dict(attrs)
+        
+        # Track CSS and JS files
+        if tag == 'link' and attrs_dict.get('rel') == 'stylesheet':
+            self.css_files.append(attrs_dict.get('href', ''))
+        if tag == 'script' and 'src' in attrs_dict:
+            self.js_files.append(attrs_dict.get('src'))
+        
+        # Track title tag
+        if tag == 'title':
+            self.in_title = True
+        
+        # Track page title (h1 with class page-title)
+        if tag == 'h1' and 'page-title' in attrs_dict.get('class', ''):
+            self.in_page_title = True
+        
+        # Track nav items
+        if tag == 'a' and 'nav-item' in attrs_dict.get('class', ''):
+            href = attrs_dict.get('href', '')
+            classes = attrs_dict.get('class', '')
+            self.nav_items.append({'href': href, 'classes': classes})
+        
+        # Track empty state message
+        if 'empty-state-message' in attrs_dict.get('class', ''):
+            self.in_empty_message = True
+        
+        # Track add habit button
+        if tag == 'button' and 'add-habit-btn' in attrs_dict.get('class', ''):
+            self.has_add_button = True
+            self.in_button = True
+        
+        # Track lucide plus icon in button context
+        if self.in_button and tag == 'i':
+            lucide_attr = attrs_dict.get('data-lucide', '')
+            if 'plus' in lucide_attr:
+                self.has_lucide_plus = True
+    
+    def handle_endtag(self, tag):
+        if tag == 'title':
+            self.in_title = False
+        if tag == 'h1':
+            self.in_page_title = False
+        if tag == 'p':
+            self.in_empty_message = False
+        if tag == 'button':
+            self.in_button = False
+    
+    def handle_data(self, data):
+        if self.in_title:
+            self.title_text = data.strip()
+        if self.in_page_title:
+            self.page_title = data.strip()
+        if self.in_empty_message:
+            self.empty_state_message = data.strip()
+
+def test_file_exists():
+    """Test 1: File exists"""
+    assert os.path.exists(HABITS_HTML_PATH), f"File {HABITS_HTML_PATH} not found"
+    print("✓ Test 1: File exists")
+
+def test_valid_html5():
+    """Test 2: Valid HTML5 structure"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Check DOCTYPE
+    assert content.strip().startswith('<!DOCTYPE html>'), "Missing or incorrect DOCTYPE"
+    
+    # Check required tags
+    required_tags = ['<html', '<head>', '<meta charset', '<title>', '<body>', '</html>']
+    for tag in required_tags:
+        assert tag in content, f"Missing required tag: {tag}"
+    
+    # Check html lang attribute
+    assert 'lang="ro"' in content or "lang='ro'" in content, "Missing lang='ro' attribute on html tag"
+    
+    print("✓ Test 2: Valid HTML5 structure")
+
+def test_uses_common_css_and_swipe_nav():
+    """Test 3: Uses common.css and swipe-nav.js"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = HTMLStructureParser()
+    parser.feed(content)
+    
+    # Check for common.css
+    assert any('common.css' in css for css in parser.css_files), "Missing common.css"
+    
+    # Check for swipe-nav.js
+    assert any('swipe-nav.js' in js for js in parser.js_files), "Missing swipe-nav.js"
+    
+    print("✓ Test 3: Uses common.css and swipe-nav.js")
+
+def test_navigation_bar():
+    """Test 4: Has navigation bar matching dashboard style"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = HTMLStructureParser()
+    parser.feed(content)
+    
+    # Check that we have nav items
+    assert len(parser.nav_items) >= 4, f"Expected at least 4 nav items, found {len(parser.nav_items)}"
+    
+    # Check for Dashboard nav item
+    dashboard_items = [item for item in parser.nav_items if 'index.html' in item['href']]
+    assert len(dashboard_items) > 0, "Missing Dashboard nav item"
+    
+    # Check for habits nav item with active class
+    habits_items = [item for item in parser.nav_items if 'habits.html' in item['href']]
+    assert len(habits_items) > 0, "Missing Habits nav item"
+    assert any('active' in item['classes'] for item in habits_items), "Habits nav item should have 'active' class"
+    
+    # Check for header element with class 'header'
+    assert '<header class="header">' in content, "Missing header element with class 'header'"
+    
+    print("✓ Test 4: Has navigation bar matching dashboard style")
+
+def test_page_title():
+    """Test 5: Page title 'Habit Tracker' in header"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = HTMLStructureParser()
+    parser.feed(content)
+    
+    # Check <title> tag
+    assert parser.title_text is not None, "Missing <title> tag"
+    assert 'Habit Tracker' in parser.title_text, f"Expected 'Habit Tracker' in title, got: {parser.title_text}"
+    
+    # Check page header (h1)
+    assert parser.page_title is not None, "Missing page title (h1.page-title)"
+    assert 'Habit Tracker' in parser.page_title, f"Expected 'Habit Tracker' in page title, got: {parser.page_title}"
+    
+    print("✓ Test 5: Page title 'Habit Tracker' in header")
+
+def test_empty_state_message():
+    """Test 6: Empty state message 'Nicio obișnuință încă. Creează prima!'"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = HTMLStructureParser()
+    parser.feed(content)
+    
+    # Check empty state message
+    assert parser.empty_state_message is not None, "Missing empty state message"
+    expected_message = "Nicio obișnuință încă. Creează prima!"
+    assert parser.empty_state_message == expected_message, \
+        f"Expected '{expected_message}', got: '{parser.empty_state_message}'"
+    
+    # Check for empty-state class
+    assert 'class="empty-state"' in content, "Missing empty-state element"
+    
+    print("✓ Test 6: Empty state message present")
+
+def test_add_habit_button():
+    """Test 7: Add habit button with '+' icon (lucide)"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = HTMLStructureParser()
+    parser.feed(content)
+    
+    # Check for add habit button
+    assert parser.has_add_button, "Missing add habit button with class 'add-habit-btn'"
+    
+    # Check for lucide plus icon
+    assert parser.has_lucide_plus, "Missing lucide 'plus' icon in add habit button"
+    
+    # Check button text content
+    assert 'Adaugă obișnuință' in content, "Missing button text 'Adaugă obișnuință'"
+    
+    print("✓ Test 7: Add habit button with '+' icon (lucide)")
+
+def run_all_tests():
+    """Run all tests"""
+    print("Running habits.html structure tests...\n")
+    
+    try:
+        test_file_exists()
+        test_valid_html5()
+        test_uses_common_css_and_swipe_nav()
+        test_navigation_bar()
+        test_page_title()
+        test_empty_state_message()
+        test_add_habit_button()
+        
+        print("\n✅ All tests passed!")
+        return True
+    except AssertionError as e:
+        print(f"\n❌ Test failed: {e}")
+        return False
+    except Exception as e:
+        print(f"\n❌ Unexpected error: {e}")
+        return False
+
+if __name__ == '__main__':
+    success = run_all_tests()
+    exit(0 if success else 1)

dashboard/test_habits_modal.py

@@ -0,0 +1,342 @@
+#!/usr/bin/env python3
+"""
+Tests for habit creation modal in habits.html
+Validates modal structure, form elements, buttons, and styling
+"""
+
+import os
+import sys
+from html.parser import HTMLParser
+
+HABITS_HTML_PATH = 'dashboard/habits.html'
+
+class ModalParser(HTMLParser):
+    """Parser to extract modal elements from HTML"""
+    def __init__(self):
+        super().__init__()
+        self.in_modal = False
+        self.in_modal_title = False
+        self.in_form_label = False
+        self.in_button = False
+        self.modal_title = None
+        self.form_labels = []
+        self.name_input_attrs = None
+        self.radio_buttons = []
+        self.buttons = []
+        self.radio_labels = []
+        self.in_radio_label = False
+        self.current_radio_label = None
+        self.modal_overlay_found = False
+        self.modal_div_found = False
+        self.toast_found = False
+        
+    def handle_starttag(self, tag, attrs):
+        attrs_dict = dict(attrs)
+        
+        # Check for modal overlay
+        if tag == 'div' and attrs_dict.get('id') == 'habitModal':
+            self.modal_overlay_found = True
+            if 'modal-overlay' in attrs_dict.get('class', ''):
+                self.in_modal = True
+        
+        # Check for modal div
+        if self.in_modal and tag == 'div' and 'modal' in attrs_dict.get('class', ''):
+            self.modal_div_found = True
+        
+        # Check for modal title
+        if self.in_modal and tag == 'h2' and 'modal-title' in attrs_dict.get('class', ''):
+            self.in_modal_title = True
+        
+        # Check for form labels
+        if self.in_modal and tag == 'label' and 'form-label' in attrs_dict.get('class', ''):
+            self.in_form_label = True
+        
+        # Check for name input
+        if self.in_modal and tag == 'input' and attrs_dict.get('id') == 'habitName':
+            self.name_input_attrs = attrs_dict
+        
+        # Check for radio buttons
+        if self.in_modal and tag == 'input' and attrs_dict.get('type') == 'radio':
+            self.radio_buttons.append(attrs_dict)
+        
+        # Check for radio labels
+        if self.in_modal and tag == 'label' and 'radio-label' in attrs_dict.get('class', ''):
+            self.in_radio_label = True
+            self.current_radio_label = attrs_dict.get('for', '')
+        
+        # Check for buttons
+        if self.in_modal and tag == 'button':
+            self.buttons.append(attrs_dict)
+            self.in_button = True
+        
+        # Check for toast
+        if tag == 'div' and attrs_dict.get('id') == 'toast':
+            self.toast_found = True
+    
+    def handle_endtag(self, tag):
+        if tag == 'h2':
+            self.in_modal_title = False
+        if tag == 'label':
+            self.in_form_label = False
+            self.in_radio_label = False
+        if tag == 'button':
+            self.in_button = False
+        if tag == 'div' and self.in_modal:
+            # Don't close modal state until we're sure we've left it
+            pass
+    
+    def handle_data(self, data):
+        if self.in_modal_title and not self.modal_title:
+            self.modal_title = data.strip()
+        if self.in_form_label:
+            self.form_labels.append(data.strip())
+        if self.in_radio_label:
+            self.radio_labels.append({'for': self.current_radio_label, 'text': data.strip()})
+
+def test_modal_structure():
+    """Test modal HTML structure exists"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = ModalParser()
+    parser.feed(content)
+    
+    # Check modal overlay exists
+    assert parser.modal_overlay_found, "Modal overlay with id='habitModal' not found"
+    
+    # Check modal container exists
+    assert parser.modal_div_found, "Modal div with class='modal' not found"
+    
+    # Check modal title
+    assert parser.modal_title is not None, "Modal title not found"
+    assert 'nou' in parser.modal_title.lower(), f"Modal title should mention 'nou', got: {parser.modal_title}"
+    
+    print("✓ Modal structure exists")
+
+def test_name_input_field():
+    """Test habit name input field exists and is required"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = ModalParser()
+    parser.feed(content)
+    
+    # Find name input
+    assert parser.name_input_attrs is not None, "Name input field with id='habitName' not found"
+    
+    # Check it's a text input
+    assert parser.name_input_attrs.get('type') == 'text', "Name input should be type='text'"
+    
+    # Check it has class 'input'
+    assert 'input' in parser.name_input_attrs.get('class', ''), "Name input should have class='input'"
+    
+    # Check it has placeholder
+    assert parser.name_input_attrs.get('placeholder'), "Name input should have placeholder"
+    
+    # Check label exists and mentions required (*)
+    found_required_label = any('*' in label for label in parser.form_labels)
+    assert found_required_label, "Should have a form label with * indicating required field"
+    
+    print("✓ Name input field exists with required indicator")
+
+def test_frequency_radio_buttons():
+    """Test frequency radio buttons exist with daily and weekly options"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = ModalParser()
+    parser.feed(content)
+    
+    # Check we have radio buttons
+    assert len(parser.radio_buttons) >= 2, f"Should have at least 2 radio buttons, found {len(parser.radio_buttons)}"
+    
+    # Find daily radio button
+    daily_radio = next((r for r in parser.radio_buttons if r.get('value') == 'daily'), None)
+    assert daily_radio is not None, "Daily radio button with value='daily' not found"
+    assert daily_radio.get('name') == 'frequency', "Daily radio should have name='frequency'"
+    # Check for 'checked' attribute - it may be None or empty string when present
+    assert 'checked' in daily_radio, "Daily radio should be checked by default"
+    
+    # Find weekly radio button
+    weekly_radio = next((r for r in parser.radio_buttons if r.get('value') == 'weekly'), None)
+    assert weekly_radio is not None, "Weekly radio button with value='weekly' not found"
+    assert weekly_radio.get('name') == 'frequency', "Weekly radio should have name='frequency'"
+    
+    # Check labels exist with Romanian text
+    daily_label = next((l for l in parser.radio_labels if 'zilnic' in l['text'].lower()), None)
+    assert daily_label is not None, "Daily label with 'Zilnic' text not found"
+    
+    weekly_label = next((l for l in parser.radio_labels if 'săptămânal' in l['text'].lower()), None)
+    assert weekly_label is not None, "Weekly label with 'Săptămânal' text not found"
+    
+    print("✓ Frequency radio buttons exist with daily (default) and weekly options")
+
+def test_modal_buttons():
+    """Test modal has Cancel and Create buttons"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = ModalParser()
+    parser.feed(content)
+    
+    # Check we have 2 buttons
+    assert len(parser.buttons) >= 2, f"Should have at least 2 buttons, found {len(parser.buttons)}"
+    
+    # Check Cancel button
+    cancel_btn = next((b for b in parser.buttons if 'btn-secondary' in b.get('class', '')), None)
+    assert cancel_btn is not None, "Cancel button with class='btn-secondary' not found"
+    assert 'hideHabitModal' in cancel_btn.get('onclick', ''), "Cancel should call hideHabitModal"
+    
+    # Check Create button
+    create_btn = next((b for b in parser.buttons if b.get('id') == 'habitCreateBtn'), None)
+    assert create_btn is not None, "Create button with id='habitCreateBtn' not found"
+    assert 'btn-primary' in create_btn.get('class', ''), "Create button should have class='btn-primary'"
+    assert 'createHabit' in create_btn.get('onclick', ''), "Create should call createHabit"
+    # Check for 'disabled' attribute - it may be None or empty string when present
+    assert 'disabled' in create_btn, "Create button should start disabled"
+    
+    # Check button text in content
+    assert 'anulează' in content.lower(), "Cancel button should say 'Anulează'"
+    assert 'creează' in content.lower(), "Create button should say 'Creează'"
+    
+    print("✓ Modal has Cancel and Create buttons with correct attributes")
+
+def test_add_button_triggers_modal():
+    """Test that add habit button calls showAddHabitModal"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Find add habit button
+    assert 'class="add-habit-btn"' in content, "Add habit button not found"
+    assert 'showAddHabitModal()' in content, "Add button should call showAddHabitModal()"
+    
+    print("✓ Add habit button calls showAddHabitModal()")
+
+def test_modal_styling():
+    """Test modal uses dashboard modal styling patterns"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Check key modal classes exist in CSS
+    required_styles = [
+        '.modal-overlay',
+        '.modal-overlay.active',
+        '.modal {',
+        '.modal-title',
+        '.modal-actions',
+        '.form-group',
+        '.form-label',
+        '.radio-group',
+    ]
+    
+    for style in required_styles:
+        assert style in content, f"Modal style '{style}' not found"
+    
+    # Check modal uses CSS variables (dashboard pattern)
+    assert 'var(--bg-base)' in content, "Modal should use --bg-base"
+    assert 'var(--border)' in content, "Modal should use --border"
+    assert 'var(--accent)' in content, "Modal should use --accent"
+    
+    print("✓ Modal uses dashboard modal styling patterns")
+
+def test_javascript_functions():
+    """Test JavaScript functions for modal interaction exist"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Check essential functions exist
+    assert 'function showAddHabitModal()' in content, "showAddHabitModal function not found"
+    assert 'function hideHabitModal()' in content, "hideHabitModal function not found"
+    assert 'async function createHabit()' in content or 'function createHabit()' in content, "createHabit function not found"
+    
+    # Check form validation logic
+    assert "createBtn.disabled" in content, "Create button disable logic not found"
+    assert "nameInput.value.trim()" in content, "Name trim validation not found"
+    
+    # Check modal show/hide logic
+    assert "modal.classList.add('active')" in content, "Modal show logic not found"
+    assert "modal.classList.remove('active')" in content, "Modal hide logic not found"
+    
+    # Check API integration
+    assert "fetch('/api/habits'" in content, "API call to /api/habits not found"
+    assert "method: 'POST'" in content, "POST method not found"
+    
+    print("✓ JavaScript functions for modal interaction exist")
+
+def test_toast_notification():
+    """Test toast notification element exists"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    parser = ModalParser()
+    parser.feed(content)
+    
+    # Find toast element
+    assert parser.toast_found, "Toast notification element with id='toast' not found"
+    
+    # Check toast styles exist
+    assert '.toast' in content, "Toast styles not found"
+    assert '.toast.show' in content, "Toast show state styles not found"
+    
+    # Check showToast function exists
+    assert 'function showToast(' in content, "showToast function not found"
+    
+    print("✓ Toast notification element exists")
+
+def test_form_validation_event_listeners():
+    """Test form validation with event listeners"""
+    with open(HABITS_HTML_PATH, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    # Check for DOMContentLoaded event listener
+    assert "addEventListener('DOMContentLoaded'" in content or "DOMContentLoaded" in content, \
+        "Should have DOMContentLoaded event listener"
+    
+    # Check for input event listener on name field
+    assert "addEventListener('input'" in content, "Should have input event listener for validation"
+    
+    # Check for Enter key handling
+    assert "addEventListener('keypress'" in content or "e.key === 'Enter'" in content, \
+        "Should handle Enter key submission"
+    
+    print("✓ Form validation event listeners exist")
+
+def run_tests():
+    """Run all tests"""
+    tests = [
+        test_modal_structure,
+        test_name_input_field,
+        test_frequency_radio_buttons,
+        test_modal_buttons,
+        test_add_button_triggers_modal,
+        test_modal_styling,
+        test_javascript_functions,
+        test_toast_notification,
+        test_form_validation_event_listeners,
+    ]
+    
+    print("Running habit modal tests...\n")
+    
+    failed = []
+    for test in tests:
+        try:
+            test()
+        except AssertionError as e:
+            print(f"✗ {test.__name__}: {e}")
+            failed.append(test.__name__)
+        except Exception as e:
+            print(f"✗ {test.__name__}: Unexpected error: {e}")
+            failed.append(test.__name__)
+    
+    print(f"\n{'='*50}")
+    if failed:
+        print(f"FAILED: {len(failed)} test(s) failed")
+        for name in failed:
+            print(f"  - {name}")
+        sys.exit(1)
+    else:
+        print(f"SUCCESS: All {len(tests)} tests passed!")
+        sys.exit(0)
+
+if __name__ == '__main__':
+    run_tests()

dashboard/test_habits_post.py

@@ -0,0 +1,204 @@
+#!/usr/bin/env python3
+"""Tests for POST /api/habits endpoint"""
+
+import json
+import shutil
+import sys
+import tempfile
+import unittest
+from datetime import datetime
+from http.server import HTTPServer
+from pathlib import Path
+from threading import Thread
+from time import sleep
+from urllib.request import Request, urlopen
+from urllib.error import HTTPError
+
+# Add parent directory to path
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from dashboard.api import TaskBoardHandler
+
+class TestHabitsPost(unittest.TestCase):
+    """Test POST /api/habits endpoint"""
+    
+    @classmethod
+    def setUpClass(cls):
+        """Start test server"""
+        # Create temp habits.json
+        cls.temp_dir = Path(tempfile.mkdtemp())
+        cls.habits_file = cls.temp_dir / 'habits.json'
+        cls.habits_file.write_text(json.dumps({
+            'lastUpdated': datetime.now().isoformat(),
+            'habits': []
+        }))
+        
+        # Monkey-patch KANBAN_DIR
+        import dashboard.api as api_module
+        cls.original_kanban_dir = api_module.KANBAN_DIR
+        api_module.KANBAN_DIR = cls.temp_dir
+        
+        # Start server
+        cls.port = 18088
+        cls.server = HTTPServer(('127.0.0.1', cls.port), TaskBoardHandler)
+        cls.thread = Thread(target=cls.server.serve_forever, daemon=True)
+        cls.thread.start()
+        sleep(0.5)
+        
+        cls.base_url = f'http://127.0.0.1:{cls.port}'
+    
+    @classmethod
+    def tearDownClass(cls):
+        """Stop server and cleanup"""
+        cls.server.shutdown()
+        cls.thread.join(timeout=2)
+        
+        # Restore KANBAN_DIR
+        import dashboard.api as api_module
+        api_module.KANBAN_DIR = cls.original_kanban_dir
+        
+        # Cleanup temp dir
+        shutil.rmtree(cls.temp_dir)
+    
+    def setUp(self):
+        """Reset habits.json before each test"""
+        self.habits_file.write_text(json.dumps({
+            'lastUpdated': datetime.now().isoformat(),
+            'habits': []
+        }))
+    
+    def post_habit(self, data):
+        """Helper to POST to /api/habits"""
+        url = f'{self.base_url}/api/habits'
+        req = Request(url, data=json.dumps(data).encode(), method='POST')
+        req.add_header('Content-Type', 'application/json')
+        return urlopen(req)
+    
+    def test_create_habit_success(self):
+        """Test creating a valid habit"""
+        data = {'name': 'Bazin', 'frequency': 'daily'}
+        resp = self.post_habit(data)
+        
+        self.assertEqual(resp.status, 201)
+        
+        result = json.loads(resp.read())
+        self.assertIn('id', result)
+        self.assertTrue(result['id'].startswith('habit-'))
+        self.assertEqual(result['name'], 'Bazin')
+        self.assertEqual(result['frequency'], 'daily')
+        self.assertIn('createdAt', result)
+        self.assertEqual(result['completions'], [])
+        
+        # Verify ISO timestamp
+        datetime.fromisoformat(result['createdAt'])
+    
+    def test_habit_persisted_to_file(self):
+        """Test habit is written to habits.json"""
+        data = {'name': 'Sală', 'frequency': 'weekly'}
+        resp = self.post_habit(data)
+        habit = json.loads(resp.read())
+        
+        # Read file
+        file_data = json.loads(self.habits_file.read_text())
+        self.assertEqual(len(file_data['habits']), 1)
+        self.assertEqual(file_data['habits'][0]['id'], habit['id'])
+        self.assertEqual(file_data['habits'][0]['name'], 'Sală')
+    
+    def test_id_format_correct(self):
+        """Test generated id follows 'habit-{timestamp}' format"""
+        data = {'name': 'Test', 'frequency': 'daily'}
+        resp = self.post_habit(data)
+        habit = json.loads(resp.read())
+        
+        habit_id = habit['id']
+        self.assertTrue(habit_id.startswith('habit-'))
+        
+        # Extract timestamp and verify it's numeric
+        timestamp_part = habit_id.replace('habit-', '')
+        self.assertTrue(timestamp_part.isdigit())
+        
+        # Verify timestamp is reasonable (milliseconds since epoch)
+        timestamp_ms = int(timestamp_part)
+        now_ms = int(datetime.now().timestamp() * 1000)
+        # Should be within 5 seconds
+        self.assertLess(abs(now_ms - timestamp_ms), 5000)
+    
+    def test_missing_name_returns_400(self):
+        """Test missing name returns 400"""
+        data = {'frequency': 'daily'}
+        
+        with self.assertRaises(HTTPError) as ctx:
+            self.post_habit(data)
+        
+        self.assertEqual(ctx.exception.code, 400)
+        error = json.loads(ctx.exception.read())
+        self.assertIn('name', error['error'].lower())
+    
+    def test_empty_name_returns_400(self):
+        """Test empty name (whitespace only) returns 400"""
+        data = {'name': '   ', 'frequency': 'daily'}
+        
+        with self.assertRaises(HTTPError) as ctx:
+            self.post_habit(data)
+        
+        self.assertEqual(ctx.exception.code, 400)
+    
+    def test_invalid_frequency_returns_400(self):
+        """Test invalid frequency returns 400"""
+        data = {'name': 'Test', 'frequency': 'monthly'}
+        
+        with self.assertRaises(HTTPError) as ctx:
+            self.post_habit(data)
+        
+        self.assertEqual(ctx.exception.code, 400)
+        error = json.loads(ctx.exception.read())
+        self.assertIn('frequency', error['error'].lower())
+    
+    def test_missing_frequency_returns_400(self):
+        """Test missing frequency returns 400"""
+        data = {'name': 'Test'}
+        
+        with self.assertRaises(HTTPError) as ctx:
+            self.post_habit(data)
+        
+        self.assertEqual(ctx.exception.code, 400)
+    
+    def test_multiple_habits_created(self):
+        """Test creating multiple habits"""
+        habit1 = {'name': 'Bazin', 'frequency': 'daily'}
+        habit2 = {'name': 'Sală', 'frequency': 'weekly'}
+        
+        resp1 = self.post_habit(habit1)
+        h1 = json.loads(resp1.read())
+        
+        # Small delay to ensure different timestamp
+        sleep(0.01)
+        
+        resp2 = self.post_habit(habit2)
+        h2 = json.loads(resp2.read())
+        
+        # IDs should be different
+        self.assertNotEqual(h1['id'], h2['id'])
+        
+        # Both should be in file
+        file_data = json.loads(self.habits_file.read_text())
+        self.assertEqual(len(file_data['habits']), 2)
+    
+    def test_last_updated_timestamp(self):
+        """Test lastUpdated is updated when creating habit"""
+        before = datetime.now().isoformat()
+        
+        data = {'name': 'Test', 'frequency': 'daily'}
+        self.post_habit(data)
+        
+        file_data = json.loads(self.habits_file.read_text())
+        last_updated = file_data['lastUpdated']
+        
+        # Should be a valid ISO timestamp
+        datetime.fromisoformat(last_updated)
+        # Should be recent
+        self.assertGreaterEqual(last_updated, before)
+
+
+if __name__ == '__main__':
+    unittest.main()

dashboard/test_habits_schema.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python3
+"""
+Test suite for habits.json schema validation
+"""
+import json
+import os
+from datetime import datetime
+
+
+def test_habits_file_exists():
+    """Test that habits.json file exists"""
+    assert os.path.exists('dashboard/habits.json'), "habits.json should exist in dashboard/"
+    print("✓ habits.json file exists")
+
+
+def test_valid_json():
+    """Test that habits.json is valid JSON"""
+    try:
+        with open('dashboard/habits.json', 'r') as f:
+            data = json.load(f)
+        print("✓ habits.json is valid JSON")
+        return data
+    except json.JSONDecodeError as e:
+        raise AssertionError(f"habits.json is not valid JSON: {e}")
+
+
+def test_root_structure(data):
+    """Test that root structure has required fields"""
+    assert 'lastUpdated' in data, "Root should have 'lastUpdated' field"
+    assert 'habits' in data, "Root should have 'habits' field"
+    print("✓ Root structure has lastUpdated and habits fields")
+
+
+def test_last_updated_format(data):
+    """Test that lastUpdated is a valid ISO timestamp"""
+    try:
+        datetime.fromisoformat(data['lastUpdated'].replace('Z', '+00:00'))
+        print("✓ lastUpdated is valid ISO timestamp")
+    except (ValueError, AttributeError) as e:
+        raise AssertionError(f"lastUpdated is not a valid ISO timestamp: {e}")
+
+
+def test_habits_is_array(data):
+    """Test that habits is an array"""
+    assert isinstance(data['habits'], list), "habits should be an array"
+    print("✓ habits is an array")
+
+
+def test_habit_schema():
+    """Test habit schema structure with sample data"""
+    # Sample habit to validate schema
+    sample_habit = {
+        "id": "habit-123",
+        "name": "Bazin",
+        "frequency": "daily",
+        "createdAt": "2026-02-10T10:57:00.000Z",
+        "completions": ["2026-02-10T10:00:00.000Z", "2026-02-09T10:00:00.000Z"]
+    }
+    
+    # Validate required fields
+    required_fields = ['id', 'name', 'frequency', 'createdAt', 'completions']
+    for field in required_fields:
+        assert field in sample_habit, f"Habit should have '{field}' field"
+    
+    # Validate types
+    assert isinstance(sample_habit['id'], str), "id should be string"
+    assert isinstance(sample_habit['name'], str), "name should be string"
+    assert sample_habit['frequency'] in ['daily', 'weekly'], "frequency should be 'daily' or 'weekly'"
+    assert isinstance(sample_habit['completions'], list), "completions should be array"
+    
+    # Validate ISO dates
+    datetime.fromisoformat(sample_habit['createdAt'].replace('Z', '+00:00'))
+    for completion in sample_habit['completions']:
+        datetime.fromisoformat(completion.replace('Z', '+00:00'))
+    
+    print("✓ Habit schema structure is valid")
+
+
+def test_initial_state(data):
+    """Test that initial file has empty habits array"""
+    assert len(data['habits']) == 0, "Initial habits array should be empty"
+    print("✓ Initial habits array is empty")
+
+
+def run_all_tests():
+    """Run all schema validation tests"""
+    print("Running habits.json schema validation tests...\n")
+    
+    try:
+        test_habits_file_exists()
+        data = test_valid_json()
+        test_root_structure(data)
+        test_last_updated_format(data)
+        test_habits_is_array(data)
+        test_habit_schema()
+        test_initial_state(data)
+        
+        print("\n✅ All tests passed!")
+        return True
+    except AssertionError as e:
+        print(f"\n❌ Test failed: {e}")
+        return False
+    except Exception as e:
+        print(f"\n❌ Unexpected error: {e}")
+        return False
+
+
+if __name__ == '__main__':
+    success = run_all_tests()
+    exit(0 if success else 1)

dashboard/test_habits_streak.py

@@ -0,0 +1,179 @@
+#!/usr/bin/env python3
+"""
+Tests for streak calculation utility.
+Story 4.0: Backend API - Streak calculation utility
+"""
+
+import sys
+from pathlib import Path
+from datetime import datetime, timedelta
+
+# Add dashboard to path to import api module
+sys.path.insert(0, str(Path(__file__).parent))
+
+from api import calculate_streak
+
+
+def test_no_completions():
+    """Returns 0 for no completions"""
+    assert calculate_streak([], 'daily') == 0
+    assert calculate_streak([], 'weekly') == 0
+    print("✓ No completions returns 0")
+
+
+def test_daily_single_completion_today():
+    """Single completion today counts as streak of 1"""
+    today = datetime.now().isoformat()
+    assert calculate_streak([today], 'daily') == 1
+    print("✓ Daily: single completion today = streak 1")
+
+
+def test_daily_single_completion_yesterday():
+    """Single completion yesterday counts as streak of 1"""
+    yesterday = (datetime.now() - timedelta(days=1)).isoformat()
+    assert calculate_streak([yesterday], 'daily') == 1
+    print("✓ Daily: single completion yesterday = streak 1")
+
+
+def test_daily_consecutive_days():
+    """Multiple consecutive days count correctly"""
+    completions = [
+        (datetime.now() - timedelta(days=i)).isoformat()
+        for i in range(5)  # Today, yesterday, 2 days ago, 3 days ago, 4 days ago
+    ]
+    assert calculate_streak(completions, 'daily') == 5
+    print("✓ Daily: 5 consecutive days = streak 5")
+
+
+def test_daily_broken_streak():
+    """Gap in daily completions breaks streak"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        (today - timedelta(days=1)).isoformat(),
+        # Gap here (day 2 missing)
+        (today - timedelta(days=3)).isoformat(),
+        (today - timedelta(days=4)).isoformat(),
+    ]
+    # Should count only today and yesterday before the gap
+    assert calculate_streak(completions, 'daily') == 2
+    print("✓ Daily: gap breaks streak (counts only before gap)")
+
+
+def test_daily_old_completion():
+    """Completion more than 1 day ago returns 0"""
+    two_days_ago = (datetime.now() - timedelta(days=2)).isoformat()
+    assert calculate_streak([two_days_ago], 'daily') == 0
+    print("✓ Daily: completion >1 day ago = streak 0")
+
+
+def test_weekly_single_completion_this_week():
+    """Single completion this week counts as streak of 1"""
+    today = datetime.now().isoformat()
+    assert calculate_streak([today], 'weekly') == 1
+    print("✓ Weekly: single completion this week = streak 1")
+
+
+def test_weekly_consecutive_weeks():
+    """Multiple consecutive weeks count correctly"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        (today - timedelta(days=7)).isoformat(),
+        (today - timedelta(days=14)).isoformat(),
+        (today - timedelta(days=21)).isoformat(),
+    ]
+    assert calculate_streak(completions, 'weekly') == 4
+    print("✓ Weekly: 4 consecutive weeks = streak 4")
+
+
+def test_weekly_broken_streak():
+    """Missing week breaks streak"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        (today - timedelta(days=7)).isoformat(),
+        # Gap here (week 2 missing)
+        (today - timedelta(days=21)).isoformat(),
+    ]
+    # Should count only current week and last week before the gap
+    assert calculate_streak(completions, 'weekly') == 2
+    print("✓ Weekly: missing week breaks streak")
+
+
+def test_weekly_old_completion():
+    """Completion more than 7 days ago returns 0"""
+    eight_days_ago = (datetime.now() - timedelta(days=8)).isoformat()
+    assert calculate_streak([eight_days_ago], 'weekly') == 0
+    print("✓ Weekly: completion >7 days ago = streak 0")
+
+
+def test_multiple_completions_same_day():
+    """Multiple completions on same day count as one"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        (today - timedelta(hours=2)).isoformat(),  # Same day, different time
+        (today - timedelta(days=1)).isoformat(),
+    ]
+    assert calculate_streak(completions, 'daily') == 2
+    print("✓ Daily: multiple completions same day = 1 day")
+
+
+def test_todays_completion_counts():
+    """Today's completion counts even if yesterday was missed"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        # Yesterday missing
+        (today - timedelta(days=2)).isoformat(),
+    ]
+    # Should count only today (yesterday breaks the streak to previous days)
+    assert calculate_streak(completions, 'daily') == 1
+    print("✓ Daily: today counts even if yesterday missed")
+
+
+def test_invalid_date_format():
+    """Invalid date format returns 0"""
+    assert calculate_streak(['not-a-date'], 'daily') == 0
+    assert calculate_streak(['2026-13-45'], 'daily') == 0
+    print("✓ Invalid date format returns 0")
+
+
+def test_weekly_multiple_in_same_week():
+    """Multiple completions in same week count as one week"""
+    today = datetime.now()
+    completions = [
+        today.isoformat(),
+        (today - timedelta(days=2)).isoformat(),  # Same week
+        (today - timedelta(days=4)).isoformat(),  # Same week
+        (today - timedelta(days=7)).isoformat(),  # Previous week
+    ]
+    assert calculate_streak(completions, 'weekly') == 2
+    print("✓ Weekly: multiple in same week = 1 week")
+
+
+def run_all_tests():
+    """Run all streak calculation tests"""
+    print("\n=== Testing Streak Calculation ===\n")
+    
+    test_no_completions()
+    test_daily_single_completion_today()
+    test_daily_single_completion_yesterday()
+    test_daily_consecutive_days()
+    test_daily_broken_streak()
+    test_daily_old_completion()
+    test_weekly_single_completion_this_week()
+    test_weekly_consecutive_weeks()
+    test_weekly_broken_streak()
+    test_weekly_old_completion()
+    test_multiple_completions_same_day()
+    test_todays_completion_counts()
+    test_invalid_date_format()
+    test_weekly_multiple_in_same_week()
+    
+    print("\n✓ All streak calculation tests passed!\n")
+
+
+if __name__ == '__main__':
+    run_all_tests()

progress.txt

@@ -0,0 +1,460 @@
+=== HABIT TRACKER FEATURE PROGRESS ===
+
+Date: 2026-02-10
+Branch: feature/habit-tracker
+Repo: /home/moltbot/clawd
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+COMPLETED STORIES:
+
+[✓] Story 1.0: Define habits.json data schema
+    Commit: ee8727a
+    Date: 2026-02-10
+    
+    Implementation:
+    - Created dashboard/habits.json with proper schema
+    - Root structure: lastUpdated (ISO timestamp) + habits (array)
+    - Habit schema: id (string), name (string), frequency (daily/weekly), 
+      createdAt (ISO), completions (array of ISO dates)
+    - Initial file contains empty habits array with current timestamp
+    - All JSON validation passes
+    
+    Tests:
+    - Created dashboard/test_habits_schema.py
+    - Tests for file existence, valid JSON, root structure
+    - Tests for lastUpdated ISO format validation
+    - Tests for habits array type
+    - Tests for complete habit schema (all required fields + types)
+    - Tests for initial empty state
+    - All tests pass ✓
+    
+    Files modified:
+    - dashboard/habits.json (created)
+    - dashboard/test_habits_schema.py (created)
+
+[✓] Story 2.0: Backend API - GET /api/habits
+    Commit: fc5ebf2
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added GET /api/habits endpoint to dashboard/api.py
+    - Endpoint returns habits array and lastUpdated timestamp
+    - Graceful error handling: returns empty array if file missing/corrupt
+    - Follows existing API patterns (similar to /api/git, /api/status)
+    - Returns 200 status for all valid requests
+    
+    Tests:
+    - Created dashboard/test_habits_api.py
+    - Tests for endpoint existence (returns 200)
+    - Tests for valid JSON response
+    - Tests for response structure (habits array + lastUpdated)
+    - Tests for ISO timestamp validation
+    - Tests for empty file handling (returns [], not error)
+    - Tests for habits with data
+    - All 6 tests pass ✓
+    
+    Files modified:
+    - dashboard/api.py (added handle_habits_get method + route)
+    - dashboard/test_habits_api.py (created)
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+CODEBASE PATTERNS:
+
+1. JSON Data Files
+   - Location: dashboard/*.json
+   - Pattern: Similar structure to tasks.json, todos.json, issues.json
+   - All use ISO timestamps for dates
+   - Root objects contain metadata + data arrays
+
+2. Testing Approach
+   - Python test files in dashboard/ directory
+   - Test naming: test_*.py
+   - Comprehensive validation: existence, JSON validity, schema, types
+   - Run tests from repo root with: python3 dashboard/test_*.py
+
+3. Build Validation
+   - Command: python3 -m py_compile dashboard/api.py
+   - Validates Python syntax without executing
+
+4. Utility Functions in api.py
+   - Standalone utility functions placed before TaskBoardHandler class
+   - Documented with docstrings (Args, Returns, Rules/behavior)
+   - ISO timestamp parsing pattern: datetime.fromisoformat(ts.replace('Z', '+00:00'))
+   - Convert to date only when time doesn't matter: dt.date()
+   - Use try/except for robust parsing with sensible defaults (return 0, [], etc.)
+
+[✓] Story 3.0: Backend API - POST /api/habits (create habit)
+    Commit: 3a09e6c
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added POST /api/habits endpoint to dashboard/api.py
+    - Accepts {name, frequency} in request body
+    - Returns 400 for missing name or empty name (after trim)
+    - Returns 400 for invalid frequency (must be 'daily' or 'weekly')
+    - Generates unique id following format 'habit-{millisecond_timestamp}'
+    - Sets createdAt to current ISO timestamp
+    - Initializes completions array as empty
+    - Persists new habit to habits.json
+    - Updates lastUpdated timestamp in habits.json
+    - Returns 201 status with created habit object
+    - Graceful handling of missing/corrupt habits.json file
+    
+    Tests:
+    - Created dashboard/test_habits_post.py
+    - Tests for successful habit creation (returns 201 + full habit object)
+    - Tests for habit persistence to habits.json
+    - Tests for correct id format (habit-{timestamp})
+    - Tests for missing name validation (400)
+    - Tests for empty name validation (400)
+    - Tests for invalid frequency validation (400)
+    - Tests for missing frequency validation (400)
+    - Tests for creating multiple habits (unique IDs)
+    - Tests for lastUpdated timestamp update
+    - All 9 tests pass ✓
+    
+    Files modified:
+    - dashboard/api.py (added handle_habits_post method + route)
+    - dashboard/test_habits_post.py (created)
+
+[✓] Story 4.0: Backend API - Streak calculation utility
+    Commit: 3927b7c
+    Date: 2026-02-10
+    
+    Implementation:
+    - Created calculate_streak(completions, frequency) utility function
+    - Added to dashboard/api.py as standalone function (before TaskBoardHandler class)
+    - Accepts completions array (ISO timestamps) and frequency ('daily' or 'weekly')
+    - Returns integer streak count (days for daily, weeks for weekly)
+    - Daily habits: counts consecutive days without gaps
+    - Weekly habits: counts consecutive weeks (7-day periods)
+    - Returns 0 for no completions, invalid dates, or broken streaks
+    - Edge case: today's completion counts even if streak was 0 yesterday
+    - Edge case: multiple completions same day/week count as one period
+    - Robust date parsing with error handling for invalid ISO timestamps
+    
+    Tests:
+    - Created dashboard/test_habits_streak.py
+    - Tests for no completions (returns 0)
+    - Tests for daily single completion (today and yesterday)
+    - Tests for daily consecutive days (5 days streak)
+    - Tests for daily broken streak (gap detection)
+    - Tests for daily old completion (>1 day ago returns 0)
+    - Tests for weekly single completion (this week)
+    - Tests for weekly consecutive weeks (4 weeks streak)
+    - Tests for weekly broken streak (missing week)
+    - Tests for weekly old completion (>7 days ago returns 0)
+    - Tests for multiple completions same day (deduplicated)
+    - Tests for today counting despite yesterday missing
+    - Tests for invalid date format handling
+    - Tests for weekly multiple in same week (deduplicated)
+    - All 14 tests pass ✓
+    - All previous tests (schema, GET, POST) still pass ✓
+    
+    Files modified:
+    - dashboard/api.py (added calculate_streak function)
+    - dashboard/test_habits_streak.py (created)
+
+[✓] Story 5.0: Backend API - POST /api/habits/{id}/check
+    Commit: ca4ee77
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added POST /api/habits/{id}/check endpoint to dashboard/api.py
+    - Extracts habit ID from URL path (/api/habits/{id}/check)
+    - Adds today's date (YYYY-MM-DD) to completions array
+    - Returns 400 if habit already checked today
+    - Returns 404 if habit ID not found
+    - Sorts completions chronologically (oldest first) after adding
+    - Uses ISO date format YYYY-MM-DD (not full timestamps)
+    - Calculates and returns streak using calculate_streak utility
+    - Returns 200 with updated habit object including streak
+    - Streak is calculated but not persisted (only in response)
+    - Updates lastUpdated timestamp in habits.json
+    - Graceful error handling for missing/corrupt files
+    
+    Tests:
+    - Created dashboard/test_habits_check.py
+    - Tests for successful habit check (returns 200 + updated habit)
+    - Tests for already checked validation (400 error)
+    - Tests for habit not found (404 error)
+    - Tests for persistence to habits.json
+    - Tests for chronological sorting of completions
+    - Tests for streak calculation in response
+    - Tests for weekly habit checking
+    - Tests for ISO date format (YYYY-MM-DD, no time)
+    - All 8 tests pass ✓
+    - All previous tests (schema, GET, POST, streak) still pass ✓
+    
+    Files modified:
+    - dashboard/api.py (added handle_habits_check method + route in do_POST)
+    - dashboard/test_habits_check.py (created)
+    - dashboard/habits.json (reset to empty for testing)
+
+[✓] Story 6.0: Backend API - GET /api/habits with streaks
+    Commit: c84135d
+    Date: 2026-02-10
+    
+    Implementation:
+    - Enhanced GET /api/habits endpoint to include calculated streaks
+    - Each habit in response now includes 'streak' field (integer)
+    - Each habit in response now includes 'checkedToday' field (boolean)
+    - Streak is calculated using the calculate_streak utility function
+    - checkedToday checks if today's date (YYYY-MM-DD) is in completions array
+    - All original habit fields are preserved in response
+    - Get today's date once and reuse for all habits (efficient)
+    - Enhanced habits array built by looping through each habit and adding fields
+    - Updated docstring to reflect new functionality
+    
+    Tests:
+    - Created dashboard/test_habits_get_enhanced.py
+    - Tests for streak field inclusion in response
+    - Tests for checkedToday boolean field inclusion
+    - Tests for correct streak calculation (daily and weekly habits)
+    - Tests for broken streaks (should return 0)
+    - Tests for empty habits array handling
+    - Tests for preservation of original habit fields
+    - All 5 tests pass ✓
+    - All previous tests (schema, GET, POST, streak, check) still pass ✓
+    
+    Files modified:
+    - dashboard/api.py (enhanced handle_habits_get method)
+    - dashboard/test_habits_get_enhanced.py (created)
+
+[✓] Story 7.0: Frontend - Create habits.html page structure
+    Commit: dd0bf24
+    Date: 2026-02-10
+    
+    Implementation:
+    - Created dashboard/habits.html with basic layout matching dashboard style
+    - Uses common.css and swipe-nav.js for consistent styling and navigation
+    - Added navigation bar with 5 items (Dashboard, Workspace, KB, Files, Habits)
+    - Habits nav item has 'active' class to indicate current page
+    - Page header with title "Habit Tracker" and subtitle
+    - Empty state section with lucide 'target' icon
+    - Empty state message: "Nicio obișnuință încă. Creează prima!"
+    - Add habit button with lucide 'plus' icon and text "Adaugă obișnuință"
+    - Theme toggle functionality (dark/light mode) matching dashboard
+    - Placeholder JavaScript functions for future API integration
+    - HTML5 compliant structure with lang="ro" attribute
+    
+    Tests:
+    - Created dashboard/test_habits_html.py
+    - Tests for file existence
+    - Tests for valid HTML5 structure (DOCTYPE, required tags, lang attribute)
+    - Tests for common.css and swipe-nav.js inclusion
+    - Tests for navigation bar with correct items and active state
+    - Tests for page title "Habit Tracker" in both <title> and <h1>
+    - Tests for empty state message with exact text
+    - Tests for add habit button with lucide plus icon
+    - All 7 tests pass ✓
+    - All previous tests (schema, API endpoints) still pass ✓
+    
+    Files modified:
+    - dashboard/habits.html (created)
+    - dashboard/test_habits_html.py (created)
+    - dashboard/habits.json (reset to empty for testing)
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+CODEBASE PATTERNS UPDATE:
+
+5. Frontend HTML Pages
+   - Location: dashboard/*.html
+   - Common structure: DOCTYPE html, lang="ro", UTF-8 charset
+   - Shared resources: common.css, swipe-nav.js, lucide icons CDN
+   - Navigation pattern: header.header > logo + nav.nav > nav-item links
+   - Active nav item has 'active' class
+   - Theme toggle button in nav with onclick="toggleTheme()"
+   - Main content in <main class="main"> with max-width container
+   - Page header pattern: .page-header > .page-title + .page-subtitle
+   - Empty states: .empty-state with centered icon, message, and action button
+   - Icons: use lucide via data-lucide attribute, initialize with lucide.createIcons()
+
+[✓] Story 8.0: Frontend - Create habit form modal
+    Commit: 97af2ae
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added modal HTML structure to habits.html with id='habitModal'
+    - Modal overlay uses dashboard styling patterns (overlay + modal container)
+    - Form includes text input for habit name (id='habitName', required)
+    - Form includes radio button group for frequency selection
+    - Two radio options: daily (default, checked) and weekly
+    - Custom styled radio buttons using .radio-group and .radio-label classes
+    - Radio buttons hidden, labels styled as clickable cards
+    - Selected radio shows accent background color
+    - Modal actions with Cancel (btn-secondary) and Create (btn-primary) buttons
+    - Cancel button calls hideHabitModal()
+    - Create button calls createHabit() and starts disabled
+    - Modal CSS follows dashboard patterns: modal-overlay, modal, modal-title, form-group, form-label, modal-actions
+    - Added toast notification element for user feedback
+    - JavaScript: showAddHabitModal() opens modal and resets form
+    - JavaScript: hideHabitModal() closes modal by removing 'active' class
+    - JavaScript: DOMContentLoaded event listener for form validation
+    - Input event listener on name field enables/disables Create button
+    - Create button disabled when name is empty (after trim)
+    - Enter key submits form if Create button is enabled
+    - createHabit() async function posts to /api/habits
+    - On success: hides modal, shows toast, calls loadHabits()
+    - On error: shows toast with error message
+    - showToast() function displays temporary notification (3 seconds)
+    - Modal uses CSS variables for theming (--bg-base, --border, --accent, etc.)
+    - Responsive design with max-width: 500px and 90% width
+    
+    Tests:
+    - Created dashboard/test_habits_modal.py
+    - Tests for modal structure (overlay, container, title)
+    - Tests for name input field with required indicator (*)
+    - Tests for frequency radio buttons (daily/weekly, daily checked by default)
+    - Tests for radio labels with correct Romanian text
+    - Tests for Cancel and Create buttons with correct classes and onclick handlers
+    - Tests for Create button starting disabled
+    - Tests for add habit button calling showAddHabitModal()
+    - Tests for modal CSS styling patterns
+    - Tests for JavaScript functions (showAddHabitModal, hideHabitModal, createHabit)
+    - Tests for form validation logic (disable button, trim validation)
+    - Tests for modal show/hide logic (classList.add/remove 'active')
+    - Tests for API integration (fetch /api/habits POST)
+    - Tests for toast notification element and function
+    - Tests for event listeners (DOMContentLoaded, input, keypress)
+    - All 9 tests pass ✓
+    - All previous tests (schema, API endpoints, HTML structure) still pass ✓
+    
+    Files modified:
+    - dashboard/habits.html (added modal HTML, CSS, and JavaScript)
+    - dashboard/test_habits_modal.py (created)
+
+[✓] Story 9.0: Frontend - Display habits list
+    Commit: 0483d73
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added CSS for habit cards (.habit-card, .habit-icon, .habit-info, .habit-streak)
+    - Added CSS for loading state with spinner animation
+    - Added CSS for error state with retry button
+    - Enhanced HTML with loading, error, and empty states (all with IDs)
+    - Implemented loadHabits() async function to fetch from /api/habits
+    - Habits sorted by streak descending (highest first)
+    - Loading state shown while fetching (loadingState.classList.add('active'))
+    - Error state shown on fetch failure with retry button
+    - Empty state shown when habits array is empty
+    - Habits list shown when habits exist
+    - Created createHabitCard(habit) function to render habit cards
+    - Daily habits show calendar icon (lucide), weekly show clock icon
+    - Each habit displays: name, frequency label, streak with 🔥 emoji
+    - Streak displayed as: "{number} 🔥" in accent color
+    - XSS protection via escapeHtml() function (uses textContent)
+    - Lucide icons reinitialized after rendering (lucide.createIcons())
+    - loadHabits() called on DOMContentLoaded (automatic page load)
+    - Habits data includes streak and checkedToday from API
+    
+    Tests:
+    - Created dashboard/test_habits_display.py
+    - Tests for loading state structure (element, class, icon, message)
+    - Tests for error state structure (element, class, icon, message, retry button)
+    - Tests for empty state ID attribute
+    - Tests for habits list container existence
+    - Tests for loadHabits function implementation and API fetch
+    - Tests for sorting by streak descending (b.streak - a.streak)
+    - Tests for frequency icons (calendar for daily, clock for weekly)
+    - Tests for streak display with flame emoji 🔥
+    - Tests for state management (show/hide logic)
+    - Tests for error handling (catch block)
+    - Tests for createHabitCard function existence
+    - Tests for page load trigger (DOMContentLoaded listener)
+    - Tests for habit card CSS styling
+    - Tests for Lucide icons reinitialization after rendering
+    - Tests for XSS protection (escapeHtml function)
+    - All 15 tests pass ✓
+    - All previous tests (schema, API, HTML, modal) still pass ✓
+    
+    Files modified:
+    - dashboard/habits.html (added habit cards CSS, loading/error states HTML, loadHabits implementation)
+    - dashboard/test_habits_display.py (created)
+
+[✓] Story 10.0: Frontend - Check habit interaction
+    Commit: 775f171
+    Date: 2026-02-10
+    
+    Implementation:
+    - Added circular checkbox button to each habit card
+    - Checkbox positioned at start of card (before icon)
+    - Checkbox styled with border-radius: 50% for circular shape
+    - Checkbox shows check icon when checkedToday is true
+    - Checkbox has 'checked' and 'disabled' classes when already done today
+    - Clicking checkbox calls checkHabit(habitId, element) function
+    - checkHabit performs optimistic UI update (checks immediately)
+    - API call to POST /api/habits/{id}/check executed after UI update
+    - On success: streak element updated with response data, shows toast
+    - On error: checkbox reverts to unchecked state, shows error toast
+    - Checkbox is non-clickable (disabled) when already checked today
+    - Streak updates dynamically using id="streak-{habitId}" element
+    - Check icon reinitialized with lucide.createIcons() after adding
+    - Hover state for unchecked checkboxes (border-color change)
+    - All CSS uses CSS variables for theming consistency
+    
+    Tests:
+    - Created dashboard/test_habits_check_ui.py
+    - Tests for checkbox CSS (circular shape, checked/disabled states, hover)
+    - Tests for checkbox inclusion in createHabitCard function
+    - Tests for checkedToday state reflection in UI
+    - Tests for checkHabit function existence and signature
+    - Tests for API call to POST /api/habits/{id}/check
+    - Tests for optimistic UI update (classList.add before fetch)
+    - Tests for error handling and revert logic
+    - Tests for disabled state when already checked
+    - Tests for streak update from response data
+    - Tests for check icon display and lucide reinitialization
+    - All 10 tests pass ✓
+    - All previous tests (schema, API endpoints, HTML, modal, display) still pass ✓
+    
+    Files modified:
+    - dashboard/habits.html (added checkbox CSS and checkHabit function)
+    - dashboard/test_habits_check_ui.py (created)
+
+[✓] Story 11.0: Frontend - Create habit from form
+    Commit: 4933847
+    Date: 2026-02-10
+    
+    Implementation:
+    - Enhanced createHabit() async function with complete form submission flow
+    - Added loading state: button disabled during submission with "Se creează..." text
+    - Button disabled immediately on submit (before API call)
+    - Original button text stored and restored on error
+    - Input field cleared after successful creation (nameInput.value = '')
+    - Success flow: closes modal, shows success toast, reloads habits list
+    - Error flow: button re-enabled, modal stays open, shows error toast
+    - Both API errors (response.ok check) and network errors (catch block) handled
+    - Error messages displayed to user via toast notifications
+    - Modal stays open on error so user can retry without re-entering data
+    - All existing form validation preserved (empty name check, trim validation)
+    - Enter key submission still works with loading state integration
+    
+    Tests:
+    - Created dashboard/test_habits_form_submit.py with 9 comprehensive tests
+    - Tests for form submission API call (POST /api/habits with name and frequency)
+    - Tests for loading state (button disabled, text changed to "Se creează...")
+    - Tests for success behavior (modal closes, list refreshes, input cleared)
+    - Tests for error behavior (modal stays open, button re-enabled, error shown)
+    - Tests for input field clearing after successful creation
+    - Tests for preservation of existing form validation logic
+    - Tests for modal reset when opened (form cleared)
+    - Tests for Enter key submission integration
+    - Tests for all 6 acceptance criteria in summary test
+    - All 9 tests pass ✓
+    - All previous tests (schema, API endpoints, HTML, modal, display, check) still pass ✓
+    
+    Files modified:
+    - dashboard/habits.html (enhanced createHabit function)
+    - dashboard/test_habits_form_submit.py (created)
+    - dashboard/habits.json (reset to empty for testing)
+
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+
+NEXT STEPS:
+- Continue with remaining 7 stories
+
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