Complete Phase 2: Frontend implementation with React + TypeScript

Frontend Features:
- React 18 + Vite + TypeScript + Tailwind CSS + Zustand
- JWT authentication with automatic token refresh
- Tree library with search and category filtering
- Full tree navigation (decision/action/solution nodes)
- Session management with notes and completion
- Session history with export (Markdown/Text/HTML)
- ErrorBoundary for graceful error handling

Backend Fixes:
- CORS: Added port 5174 to allowed origins
- Sessions: Fixed JSONB datetime serialization (mode='json')

Documentation:
- Updated PROGRESS.md with Phase 2 completion
- Updated 03-DEVELOPMENT-ROADMAP.md with checked items
- Added PHASE-2.5-PERSONAL-BRANCHING.md spec

Seed Data:
- Added backend/scripts/seed_data.py with Password Reset tree

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/LoginPage.tsx

@@ -0,0 +1,118 @@
+import { useState } from 'react'
+import { Link, useNavigate, useLocation } from 'react-router-dom'
+import { useAuthStore } from '@/store/authStore'
+import { cn } from '@/lib/utils'
+
+export function LoginPage() {
+  const navigate = useNavigate()
+  const location = useLocation()
+  const { login, isLoading, error, clearError } = useAuthStore()
+
+  const [email, setEmail] = useState('')
+  const [password, setPassword] = useState('')
+  const [localError, setLocalError] = useState('')
+
+  const from = (location.state as { from?: { pathname: string } })?.from?.pathname || '/trees'
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault()
+    setLocalError('')
+    clearError()
+
+    if (!email || !password) {
+      setLocalError('Please enter both email and password')
+      return
+    }
+
+    try {
+      await login({ email, password })
+      navigate(from, { replace: true })
+    } catch {
+      // Error is set in the store
+    }
+  }
+
+  return (
+    <div className="flex min-h-screen items-center justify-center bg-background px-4">
+      <div className="w-full max-w-md space-y-8">
+        <div className="text-center">
+          <h1 className="text-3xl font-bold tracking-tight text-foreground">Apoklisis</h1>
+          <p className="mt-2 text-muted-foreground">Sign in to your account</p>
+        </div>
+
+        <form onSubmit={handleSubmit} className="mt-8 space-y-6">
+          <div className="space-y-4 rounded-lg border border-border bg-card p-6 shadow-sm">
+            {(error || localError) && (
+              <div className="rounded-md bg-destructive/10 p-3 text-sm text-destructive">
+                {localError || error}
+              </div>
+            )}
+
+            <div>
+              <label htmlFor="email" className="block text-sm font-medium text-foreground">
+                Email address
+              </label>
+              <input
+                id="email"
+                name="email"
+                type="email"
+                autoComplete="email"
+                required
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                className={cn(
+                  'mt-1 block w-full rounded-md border border-input bg-background px-3 py-2',
+                  'text-foreground placeholder:text-muted-foreground',
+                  'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary'
+                )}
+                placeholder="you@example.com"
+              />
+            </div>
+
+            <div>
+              <label htmlFor="password" className="block text-sm font-medium text-foreground">
+                Password
+              </label>
+              <input
+                id="password"
+                name="password"
+                type="password"
+                autoComplete="current-password"
+                required
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                className={cn(
+                  'mt-1 block w-full rounded-md border border-input bg-background px-3 py-2',
+                  'text-foreground placeholder:text-muted-foreground',
+                  'focus:border-primary focus:outline-none focus:ring-1 focus:ring-primary'
+                )}
+                placeholder="••••••••••"
+              />
+            </div>
+
+            <button
+              type="submit"
+              disabled={isLoading}
+              className={cn(
+                'w-full rounded-md bg-primary px-4 py-2 text-sm font-medium text-primary-foreground',
+                'hover:bg-primary/90 focus:outline-none focus:ring-2 focus:ring-primary focus:ring-offset-2',
+                'disabled:cursor-not-allowed disabled:opacity-50'
+              )}
+            >
+              {isLoading ? 'Signing in...' : 'Sign in'}
+            </button>
+          </div>
+
+          <p className="text-center text-sm text-muted-foreground">
+            Don't have an account?{' '}
+            <Link to="/register" className="font-medium text-primary hover:text-primary/90">
+              Register
+            </Link>
+          </p>
+        </form>
+      </div>
+    </div>
+  )
+}
+
+export default LoginPage