feat: Slate & Ice Modern aesthetic redesign (#94)

* chore: update Google Fonts to Bricolage Grotesque, IBM Plex Sans, JetBrains Mono

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

* chore: update Tailwind config to Slate & Ice theme colors and fonts

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

* feat: update CSS variables and glass-card utilities for Slate & Ice theme

- Replace all color variables with Slate & Ice palette
- Add glass system vars (--glass-bg, --glass-blur, --shadow-float)
- Replace legacy glass-card with new variable-driven glass classes
- Add breatheGlow, bellWobble, slideDown, fadeInRight keyframes
- Update font references to IBM Plex Sans and Bricolage Grotesque

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

* feat: recolor BrandLogo to cyan gradient, split BrandWordmark for gradient Flow text

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

* feat: update TopBar with glassmorphism backdrop and cyan accent styling

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

* feat: update Sidebar with glassmorphism backdrop

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

* feat: add ambient atmosphere gradient orbs behind app shell

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

* feat: update QuickStats and SessionsPanel with glass-card styling

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

* feat: add WeeklyCalendar, QuickActions, OpenSessions, RecentActivity dashboard components

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

* feat: redesign dashboard layout with calendar, open sessions, and glass-card panels

New layout: greeting → calendar+actions → sessions+stats → activity
Replaces old QuickStats and SessionsPanel with new dashboard components

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

* fix: replace remaining purple hex references with ice-cyan accent

Sweep of hardcoded purple hex values (#818cf8, #6366f1) replaced with
new cyan accent (#06b6d4) in QuickActions, RecentActivity, QuickLaunch,
and SVG brand assets.

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

* docs: update CLAUDE.md branding and design system for Slate & Ice Modern

Updated Last Updated date, branding section (fonts, colors, glass
utilities, atmosphere orbs), component styling rules, and Design System
section to reflect the new ice-cyan glassmorphism theme.

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

* docs: add Slate & Ice Modern design doc and implementation plan

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

* feat: redesign login page with Slate & Ice Modern design system

Apply glassmorphism styling, atmosphere orbs, branded wordmark, and
consistent design tokens to match the updated app shell aesthetic.

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

* fix: raise TopBar z-index so profile dropdown renders above main content

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

* feat: add AI assistant with in-session copilot and standalone chat with RAG

Implements three-phase AI assistant feature:
- Phase 0: RAG infrastructure with pgvector embeddings, Voyage AI integration,
  tree chunking service, and semantic search over team's flow library
- Phase 1: In-session copilot panel during flow navigation with contextual
  AI help, current step awareness, and suggested related flows
- Phase 2: Standalone AI chat page with persistent conversation history,
  pin/delete, and configurable retention policies (account-level)

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

* feat: add account management, email verification, AI fixes, and user guides

- Profile settings, account transfer, delete/leave account flows
- Email verification with JWT tokens and Resend integration
- AI assistant/copilot fixes: markdown rendering, shared RAG helpers,
  token tracking, input refocus, model_validate usage
- User guides hub + detail pages with 13 topic guides
- Sidebar and top bar navigation for guides

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

* fix: prevent stale chunk errors after deployments

- Set Cache-Control no-cache on index.html in nginx so browsers always
  fetch fresh chunk references after a deploy
- Auto-reload on chunk load failures (stale deploy detection) with
  loop prevention via sessionStorage
- Show friendly "App Updated" message if auto-reload doesn't resolve it

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

* feat: add email verification toggle to admin settings

Adds platform-level toggle to enable/disable email verification.
When disabled, the verification banner is hidden and the send
endpoint returns 403.

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

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/api/endpoints/trees.py

@@ -1,3 +1,4 @@
+import logging
 from datetime import datetime, timezone
 from typing import Annotated, Optional
 from uuid import UUID
@@ -29,6 +30,7 @@ from app.core.audit import log_audit
 from app.core.config import settings
 from app.core.tree_validation import can_publish_tree
 from app.core.step_sync import sync_steps_from_tree, deactivate_synced_steps_for_tree
+from app.services.rag_service import index_tree as rag_index_tree
 
 router = APIRouter(prefix="/trees", tags=["trees"])
 
@@ -542,6 +544,13 @@ async def create_tree(
     )
     tree = result.scalar_one()
 
+    # Index tree for RAG (best-effort, don't fail the request)
+    try:
+        await rag_index_tree(tree.id, db)
+        await db.commit()
+    except Exception:
+        logging.getLogger(__name__).warning("RAG indexing failed for tree %s", tree.id)
+
     return build_full_tree_response(tree)
 
 
@@ -725,6 +734,13 @@ async def update_tree(
     )
     tree = result.scalar_one()
 
+    # Re-index tree for RAG (best-effort)
+    try:
+        await rag_index_tree(tree.id, db)
+        await db.commit()
+    except Exception:
+        logging.getLogger(__name__).warning("RAG re-indexing failed for tree %s", tree.id)
+
     return build_full_tree_response(tree)