feat: 2.0 - Backend API - GET /api/habits

dashboard/api.py

@@ -251,6 +251,8 @@ 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 +683,41 @@ 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."""
+        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())
+            
+            self.send_json({
+                'habits': habits,
+                'lastUpdated': last_updated
+            })
+        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