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>

frontend/src/components/assistant/SuggestedFlowCard.tsx

@@ -0,0 +1,42 @@
+import { useNavigate } from 'react-router-dom'
+import { Box, ArrowRight } from 'lucide-react'
+import { getTreeNavigatePath } from '@/lib/routing'
+import type { SuggestedFlow } from '@/types/copilot'
+
+interface SuggestedFlowCardProps {
+  flow: SuggestedFlow
+}
+
+export function SuggestedFlowCard({ flow }: SuggestedFlowCardProps) {
+  const navigate = useNavigate()
+
+  const handleClick = () => {
+    const path = getTreeNavigatePath(flow.tree_id, flow.tree_type)
+    navigate(path)
+  }
+
+  return (
+    <button
+      onClick={handleClick}
+      className="w-full text-left glass-card-static p-3 rounded-xl hover:border-[rgba(255,255,255,0.12)] transition-colors group"
+    >
+      <div className="flex items-start gap-2">
+        <Box size={14} className="text-primary mt-0.5 shrink-0" />
+        <div className="min-w-0 flex-1">
+          <div className="flex items-center gap-1.5">
+            <span className="text-[0.8125rem] font-medium text-foreground truncate">
+              {flow.tree_name}
+            </span>
+            <span className="font-label text-[0.625rem] uppercase tracking-wider text-muted-foreground">
+              {flow.tree_type}
+            </span>
+          </div>
+          <p className="text-[0.75rem] text-muted-foreground mt-0.5 line-clamp-2">
+            {flow.relevance_snippet}
+          </p>
+        </div>
+        <ArrowRight size={14} className="text-muted-foreground group-hover:text-primary transition-colors shrink-0 mt-0.5" />
+      </div>
+    </button>
+  )
+}