feat: add Quick Launch modal with actions and recent flows

- Zap button opens Quick Launch with create/navigate shortcuts
- Shows recent flows for quick session start
- Keyboard navigation support (arrows + enter)

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

frontend/src/components/layout/QuickLaunch.tsx

@@ -0,0 +1,157 @@
+import { useState, useEffect, useRef } from 'react'
+import { useNavigate } from 'react-router-dom'
+import { Plus, Play, FileText, Bookmark, Users, X } from 'lucide-react'
+import { treesApi } from '@/api/trees'
+import type { TreeListItem } from '@/types'
+import { getTreeNavigatePath } from '@/lib/routing'
+import { cn } from '@/lib/utils'
+
+interface QuickLaunchProps {
+  open: boolean
+  onClose: () => void
+}
+
+interface QuickAction {
+  id: string
+  icon: typeof Plus
+  label: string
+  description: string
+  path: string
+  color: string
+}
+
+const ACTIONS: QuickAction[] = [
+  { id: 'new-tree', icon: Plus, label: 'New Troubleshooting Flow', description: 'Create a branching decision tree', path: '/trees/new', color: '#3b82f6' },
+  { id: 'new-procedure', icon: Plus, label: 'New Procedure', description: 'Create a step-by-step procedure', path: '/flows/new', color: '#8b5cf6' },
+  { id: 'sessions', icon: Play, label: 'View Sessions', description: 'See active and recent sessions', path: '/sessions', color: '#f59e0b' },
+  { id: 'step-library', icon: Bookmark, label: 'Step Library', description: 'Browse reusable steps', path: '/step-library', color: '#10b981' },
+  { id: 'exports', icon: FileText, label: 'Exports & Shares', description: 'View shared session exports', path: '/shares', color: '#6366f1' },
+  { id: 'team', icon: Users, label: 'Team Settings', description: 'Manage team members and roles', path: '/account', color: '#ec4899' },
+]
+
+export function QuickLaunch({ open, onClose }: QuickLaunchProps) {
+  const navigate = useNavigate()
+  const [recentTrees, setRecentTrees] = useState<TreeListItem[]>([])
+  const [selectedIndex, setSelectedIndex] = useState(0)
+  const containerRef = useRef<HTMLDivElement>(null)
+
+  const allItems = [...ACTIONS.map(a => ({ type: 'action' as const, ...a })), ...recentTrees.slice(0, 4).map(t => ({ type: 'tree' as const, ...t }))]
+  const totalItems = allItems.length
+
+  useEffect(() => {
+    if (open) {
+      setSelectedIndex(0)
+      treesApi.list({ sort_by: 'updated_at' })
+        .then(trees => setRecentTrees(trees.slice(0, 4)))
+        .catch(() => {})
+    }
+  }, [open])
+
+  useEffect(() => {
+    if (!open) return
+    const handler = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') onClose()
+      if (e.key === 'ArrowDown') { e.preventDefault(); setSelectedIndex(i => Math.min(i + 1, totalItems - 1)) }
+      if (e.key === 'ArrowUp') { e.preventDefault(); setSelectedIndex(i => Math.max(i - 1, 0)) }
+      if (e.key === 'Enter') {
+        e.preventDefault()
+        const item = allItems[selectedIndex]
+        if (!item) return
+        onClose()
+        if (item.type === 'action') navigate(item.path)
+        else navigate(getTreeNavigatePath(item.id, item.tree_type))
+      }
+    }
+    document.addEventListener('keydown', handler)
+    return () => document.removeEventListener('keydown', handler)
+  }, [open, selectedIndex, totalItems, allItems, navigate, onClose])
+
+  if (!open) return null
+
+  return (
+    <div className="fixed inset-0 z-[100] flex items-start justify-center pt-[15vh]">
+      <div className="absolute inset-0 bg-black/60 backdrop-blur-sm animate-fade-in" onClick={onClose} />
+      <div ref={containerRef} className="relative w-full max-w-md rounded-xl border border-border bg-card shadow-2xl animate-scale-in">
+        <div className="flex items-center justify-between border-b border-border px-4 py-3">
+          <h3 className="text-sm font-heading font-semibold text-foreground">Quick Launch</h3>
+          <button onClick={onClose} className="rounded-lg p-1 text-muted-foreground hover:text-foreground">
+            <X size={16} />
+          </button>
+        </div>
+
+        <div className="max-h-80 overflow-y-auto p-1">
+          {/* Actions */}
+          <p className="px-3 py-1.5 text-[0.625rem] font-bold uppercase tracking-wider text-muted-foreground">Actions</p>
+          {ACTIONS.map((action, i) => {
+            const Icon = action.icon
+            return (
+              <button
+                key={action.id}
+                onClick={() => { onClose(); navigate(action.path) }}
+                onMouseEnter={() => setSelectedIndex(i)}
+                className={cn(
+                  'flex w-full items-center gap-3 rounded-lg px-3 py-2.5 text-left transition-colors',
+                  i === selectedIndex ? 'bg-accent text-foreground' : 'text-muted-foreground hover:bg-accent/50'
+                )}
+              >
+                <div
+                  className="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg"
+                  style={{ backgroundColor: `${action.color}15` }}
+                >
+                  <Icon size={16} style={{ color: action.color }} />
+                </div>
+                <div className="min-w-0">
+                  <p className="text-sm font-medium">{action.label}</p>
+                  <p className="text-[0.6875rem] text-muted-foreground">{action.description}</p>
+                </div>
+              </button>
+            )
+          })}
+
+          {/* Recent flows */}
+          {recentTrees.length > 0 && (
+            <>
+              <p className="mt-2 px-3 py-1.5 text-[0.625rem] font-bold uppercase tracking-wider text-muted-foreground">Recent Flows</p>
+              {recentTrees.slice(0, 4).map((tree, ti) => {
+                const idx = ACTIONS.length + ti
+                return (
+                  <button
+                    key={tree.id}
+                    onClick={() => { onClose(); navigate(getTreeNavigatePath(tree.id, tree.tree_type)) }}
+                    onMouseEnter={() => setSelectedIndex(idx)}
+                    className={cn(
+                      'flex w-full items-center gap-3 rounded-lg px-3 py-2.5 text-left transition-colors',
+                      idx === selectedIndex ? 'bg-accent text-foreground' : 'text-muted-foreground hover:bg-accent/50'
+                    )}
+                  >
+                    <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-lg bg-card border border-border text-base">
+                      {tree.tree_type === 'procedural' ? '📋' : '🔧'}
+                    </div>
+                    <div className="min-w-0">
+                      <p className="text-sm font-medium truncate">{tree.name}</p>
+                      <p className="text-[0.6875rem] text-muted-foreground">
+                        {tree.tree_type === 'procedural' ? 'Procedure' : 'Troubleshooting'} · {tree.usage_count} uses
+                      </p>
+                    </div>
+                    <Play size={14} className="ml-auto shrink-0 opacity-40" />
+                  </button>
+                )
+              })}
+            </>
+          )}
+        </div>
+
+        <div className="flex items-center gap-4 border-t border-border px-4 py-2">
+          <span className="flex items-center gap-1 text-[0.625rem] text-muted-foreground">
+            <kbd className="rounded border border-border bg-background px-1 py-px font-label">↑↓</kbd>
+            Navigate
+          </span>
+          <span className="flex items-center gap-1 text-[0.625rem] text-muted-foreground">
+            <kbd className="rounded border border-border bg-background px-1 py-px font-label">↵</kbd>
+            Open
+          </span>
+        </div>
+      </div>
+    </div>
+  )
+}

frontend/src/components/layout/TopBar.tsx

@@ -7,6 +7,7 @@ import { useWorkspaceStore } from '@/store/workspaceStore'
 import { getWorkspaceLabels } from '@/constants/workspaceLabels'
 import { BrandLogo } from '@/components/common/BrandLogo'
 import { CommandPalette } from './CommandPalette'
+import { QuickLaunch } from './QuickLaunch'
 import { cn } from '@/lib/utils'
 
 export function TopBar() {
@@ -19,6 +20,7 @@ export function TopBar() {
 
   const [userMenuOpen, setUserMenuOpen] = useState(false)
   const [commandPaletteOpen, setCommandPaletteOpen] = useState(false)
+  const [quickLaunchOpen, setQuickLaunchOpen] = useState(false)
   const menuRef = useRef<HTMLDivElement>(null)
 
   const handleLogout = async () => {
@@ -94,7 +96,11 @@ export function TopBar() {
 
         {/* Action buttons */}
         <div className="flex items-center gap-1">
-          <button className="rounded-lg p-2 text-muted-foreground hover:bg-card hover:text-foreground transition-colors" title="Quick Launch">
+          <button
+            onClick={() => setQuickLaunchOpen(true)}
+            className="rounded-lg p-2 text-muted-foreground hover:bg-card hover:text-foreground transition-colors"
+            title="Quick Launch"
+          >
             <Zap size={18} />
           </button>
           <button className="relative rounded-lg p-2 text-muted-foreground hover:bg-card hover:text-foreground transition-colors" title="Notifications">
@@ -168,6 +174,7 @@ export function TopBar() {
 
       {/* Command Palette */}
       <CommandPalette open={commandPaletteOpen} onClose={() => setCommandPaletteOpen(false)} />
+      <QuickLaunch open={quickLaunchOpen} onClose={() => setQuickLaunchOpen(false)} />
     </>
   )
 }