feat(dashboard): unified workspace hub — cookie auth, 9-state projects, planning chat

Merges workspace.html + ralph.html into a single unified project hub with:
- Cookie-based auth (DASHBOARD_TOKEN, HttpOnly, SameSite=Strict)
- 9-state project badge system (running-ralph/manual, planning, approved,
  pending, blocked, failed, complete, idle) with BUTTONS_FOR_STATE matrix
- SSE realtime + polling fallback, version-based optimistic concurrency (If-Match)
- Planning chat modal (phase stepper, markdown bubbles, 50s+ wait state, auto-resume)
- Propose modal (Variant B: inline Plan-with-Echo checkbox)
- 5-type toast taxonomy (success/info/warning/busy/error, 3px colored left-bar)
- Inter font self-hosted + shared tokens.css design system + DESIGN.md
- src/jsonlock.py (flock helper, sidecar .lock for stable inode)
- src/approved_tasks_cli.py (shell-safe wrapper for cron/ralph.sh)
- 55 new tests (T#1–T#30) + real jsonlock bug fix caught by T#16/T#28
- No emoji anywhere (enforced by test_dashboard_no_emoji.py)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

dashboard/static/tokens.css

@@ -0,0 +1,159 @@
+/*
+ * Echo Dashboard — Design Tokens
+ * Single source of truth for all CSS variables, fonts, and shared
+ * mobile-modal behavior. Loaded via /echo/static/tokens.css on every
+ * dashboard page (in addition to common.css for now).
+ *
+ * Token coverage:
+ *   - Colors (dark default + light theme override)
+ *   - Status palette (running, blocked, failed, complete, idle,
+ *     planning, pending, approved)
+ *   - Typography (Inter sans + JetBrains Mono mono, size scale)
+ *   - Spacing (8px grid)
+ *   - Radius scale
+ *   - Shadows / transitions
+ */
+
+/* ==========================================================
+   @font-face — Inter (self-hosted, woff2 only)
+   ========================================================== */
+@font-face {
+    font-family: 'Inter';
+    src: url('/echo/static/fonts/inter-400.woff2') format('woff2');
+    font-weight: 400;
+    font-style: normal;
+    font-display: swap;
+}
+
+@font-face {
+    font-family: 'Inter';
+    src: url('/echo/static/fonts/inter-500.woff2') format('woff2');
+    font-weight: 500;
+    font-style: normal;
+    font-display: swap;
+}
+
+@font-face {
+    font-family: 'Inter';
+    src: url('/echo/static/fonts/inter-600.woff2') format('woff2');
+    font-weight: 600;
+    font-style: normal;
+    font-display: swap;
+}
+
+@font-face {
+    font-family: 'Inter';
+    src: url('/echo/static/fonts/inter-700.woff2') format('woff2');
+    font-weight: 700;
+    font-style: normal;
+    font-display: swap;
+}
+
+/* ==========================================================
+   Tokens — dark theme (default)
+   ========================================================== */
+:root {
+    /* Colors — dark surface */
+    --bg-base: #13131a;
+    --bg-surface: rgba(255, 255, 255, 0.12);
+    --bg-surface-hover: rgba(255, 255, 255, 0.16);
+    --bg-surface-active: rgba(255, 255, 255, 0.20);
+    --bg-elevated: rgba(255, 255, 255, 0.14);
+
+    --text-primary: #ffffff;
+    --text-secondary: #f5f5f5;
+    --text-muted: #e5e5e5;
+
+    --accent: #3b82f6;
+    --accent-hover: #2563eb;
+    --accent-subtle: rgba(59, 130, 246, 0.2);
+
+    --border: rgba(255, 255, 255, 0.3);
+    --border-focus: rgba(59, 130, 246, 0.7);
+
+    --header-bg: rgba(19, 19, 26, 0.95);
+
+    --success: #22c55e;
+    --warning: #eab308;
+    --error: #ef4444;
+
+    /* Status palette — used by .status-pill[data-status] */
+    --status-running:  rgb(34, 197, 94);    /* green   — running-ralph / running-manual */
+    --status-blocked:  rgb(245, 158, 11);   /* amber */
+    --status-failed:   rgb(239, 68, 68);    /* red */
+    --status-complete: rgb(156, 163, 175);  /* slate (done = neutral) */
+    --status-idle:     var(--text-muted);
+
+    /* Status palette — extended (workflow states) */
+    --status-planning: rgb(167, 139, 250);  /* violet — Echo is planning  */
+    --status-pending:  rgb(96, 165, 250);   /* sky    — awaiting approval */
+    --status-approved: rgb(234, 179, 8);    /* gold   — approved tonight  */
+
+    /* Spacing — 8px grid */
+    --space-1: 4px;
+    --space-2: 8px;
+    --space-3: 12px;
+    --space-4: 16px;
+    --space-5: 20px;
+    --space-6: 24px;
+    --space-8: 32px;
+    --space-10: 40px;
+
+    /* Typography */
+    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
+
+    --text-xs:   0.75rem;
+    --text-sm:   0.875rem;
+    --text-base: 1rem;
+    --text-lg:   1.125rem;
+    --text-xl:   1.25rem;
+
+    /* Radius */
+    --radius-sm:   4px;
+    --radius-md:   8px;
+    --radius-lg:   12px;
+    --radius-full: 9999px;
+
+    /* Shadows */
+    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
+    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
+    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
+
+    /* Motion */
+    --transition-fast: 0.15s ease;
+    --transition-base: 0.2s ease;
+}
+
+/* ==========================================================
+   Light theme override
+   ========================================================== */
+[data-theme="light"] {
+    --bg-base: #f8f9fa;
+    --bg-surface: rgba(0, 0, 0, 0.04);
+    --bg-surface-hover: rgba(0, 0, 0, 0.08);
+    --bg-surface-active: rgba(0, 0, 0, 0.12);
+    --bg-elevated: rgba(0, 0, 0, 0.06);
+
+    --text-primary: #1a1a1a;
+    --text-secondary: #444444;
+    --text-muted: #666666;
+
+    --border: rgba(0, 0, 0, 0.12);
+    --border-focus: rgba(59, 130, 246, 0.5);
+
+    --accent-subtle: rgba(59, 130, 246, 0.12);
+
+    --header-bg: rgba(255, 255, 255, 0.95);
+}
+
+/* ==========================================================
+   Mobile modal — shared across all pages with .modal-overlay
+   ========================================================== */
+@media (max-width: 640px) {
+    .modal-overlay { padding: 0; align-items: stretch; }
+    .modal { max-width: 100vw !important; max-height: 100vh !important; border-radius: 0; height: 100vh; }
+    .modal-header { position: sticky; top: 0; background: var(--bg-base); }
+    .modal-footer { position: sticky; bottom: 0; padding-bottom: max(var(--space-4), env(safe-area-inset-bottom)); }
+    .phase-stepper .phase-step:not(.active) span:not(.step-num) { display: none; }
+}