From 45a108b4a089d72ec14710c8080255fe649fa033 Mon Sep 17 00:00:00 2001
From: Lars <Lars@stommer.de>
Date: Sat, 4 Jul 2026 20:17:03 +0200
Subject: [PATCH] Frontend: AP0.2 Login, /api/me und TenantContext-Anzeige.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 frontend/src/App.jsx | 171 ++++++++++++++++++++++++++++++++++++++++---
 frontend/src/app.css |  62 +++++++++++++++-
 2 files changed, 222 insertions(+), 11 deletions(-)

diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index b612a68..13dd341 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -1,8 +1,23 @@
-import { useEffect, useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
+
+const TOKEN_KEY = 'kairo_auth_token'
+
+function apiHeaders(token) {
+  const headers = { 'Content-Type': 'application/json' }
+  if (token) headers['X-Auth-Token'] = token
+  return headers
+}
 
 export default function App() {
   const [health, setHealth] = useState(null)
-  const [error, setError] = useState(null)
+  const [healthError, setHealthError] = useState(null)
+  const [token, setToken] = useState(() => localStorage.getItem(TOKEN_KEY) || '')
+  const [email, setEmail] = useState('')
+  const [password, setPassword] = useState('')
+  const [authError, setAuthError] = useState(null)
+  const [authBusy, setAuthBusy] = useState(false)
+  const [me, setMe] = useState(null)
+  const [context, setContext] = useState(null)
 
   useEffect(() => {
     fetch('/api/health')
@@ -11,21 +26,157 @@ export default function App() {
         return res.json()
       })
       .then(setHealth)
-      .catch((err) => setError(err.message))
+      .catch((err) => setHealthError(err.message))
   }, [])
 
+  const loadSession = useCallback(async (activeToken) => {
+    if (!activeToken) {
+      setMe(null)
+      setContext(null)
+      return
+    }
+    const meRes = await fetch('/api/me', { headers: apiHeaders(activeToken) })
+    if (!meRes.ok) {
+      localStorage.removeItem(TOKEN_KEY)
+      setToken('')
+      setMe(null)
+      setContext(null)
+      throw new Error(meRes.status === 401 ? 'Session abgelaufen' : `HTTP ${meRes.status}`)
+    }
+    setMe(await meRes.json())
+    const ctxRes = await fetch('/api/me/context', { headers: apiHeaders(activeToken) })
+    if (ctxRes.ok) setContext(await ctxRes.json())
+  }, [])
+
+  useEffect(() => {
+    if (!token) return
+    loadSession(token).catch((err) => setAuthError(err.message))
+  }, [token, loadSession])
+
+  async function handleLogin(event) {
+    event.preventDefault()
+    setAuthBusy(true)
+    setAuthError(null)
+    try {
+      const res = await fetch('/api/auth/login', {
+        method: 'POST',
+        headers: apiHeaders(),
+        body: JSON.stringify({ email, password }),
+      })
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}))
+        throw new Error(body.detail || `Login fehlgeschlagen (${res.status})`)
+      }
+      const data = await res.json()
+      localStorage.setItem(TOKEN_KEY, data.token)
+      setToken(data.token)
+      setPassword('')
+    } catch (err) {
+      setAuthError(err.message)
+    } finally {
+      setAuthBusy(false)
+    }
+  }
+
+  async function handleLogout() {
+    setAuthBusy(true)
+    setAuthError(null)
+    try {
+      if (token) {
+        await fetch('/api/auth/logout', {
+          method: 'POST',
+          headers: apiHeaders(token),
+        })
+      }
+    } catch {
+      /* Session trotzdem lokal entfernen */
+    } finally {
+      localStorage.removeItem(TOKEN_KEY)
+      setToken('')
+      setMe(null)
+      setContext(null)
+      setAuthBusy(false)
+    }
+  }
+
   return (
     <main className="shell">
-      <h1>Jinkendo Kairo</h1>
-      <p>Operativer Program Director — Sprint 0 / AP0.1</p>
+      <header className="hero">
+        <h1>Jinkendo Kairo</h1>
+        <p>Operativer Program Director — Sprint 0 / AP0.2</p>
+        <p className="muted">Auth, Tenant &amp; Actor Foundation</p>
+      </header>
+
       <section className="card">
         <h2>API Health</h2>
-        {error && <p className="error">Fehler: {error}</p>}
-        {!error && !health && <p>Lade …</p>}
-        {health && (
-          <pre>{JSON.stringify(health, null, 2)}</pre>
-        )}
+        {healthError && <p className="error">Fehler: {healthError}</p>}
+        {!healthError && !health && <p>Lade …</p>}
+        {health && <pre>{JSON.stringify(health, null, 2)}</pre>}
       </section>
+
+      <section className="card">
+        <h2>Session</h2>
+        {!token && (
+          <form className="form" onSubmit={handleLogin}>
+            <label>
+              E-Mail
+              <input
+                type="email"
+                autoComplete="username"
+                value={email}
+                onChange={(e) => setEmail(e.target.value)}
+                required
+              />
+            </label>
+            <label>
+              Passwort
+              <input
+                type="password"
+                autoComplete="current-password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                minLength={8}
+                required
+              />
+            </label>
+            <button type="submit" disabled={authBusy}>
+              {authBusy ? 'Anmelden …' : 'Anmelden'}
+            </button>
+          </form>
+        )}
+
+        {token && me && (
+          <div className="session">
+            <p>
+              Eingeloggt als <strong>{me.display_name}</strong> ({me.email})
+            </p>
+            <p className="muted">
+              Portal-Rolle: {me.portal_role}
+              {me.active_tenant_id && ` · Tenant: ${me.active_tenant_id}`}
+            </p>
+            <button type="button" className="secondary" onClick={handleLogout} disabled={authBusy}>
+              Abmelden
+            </button>
+          </div>
+        )}
+
+        {authError && <p className="error">{authError}</p>}
+      </section>
+
+      {token && me && (
+        <>
+          <section className="card">
+            <h2>/api/me</h2>
+            <pre>{JSON.stringify(me, null, 2)}</pre>
+          </section>
+          {context && (
+            <section className="card">
+              <h2>/api/me/context</h2>
+              <pre>{JSON.stringify(context, null, 2)}</pre>
+            </section>
+          )}
+        </>
+      )}
     </main>
   )
 }
diff --git a/frontend/src/app.css b/frontend/src/app.css
index 2a8997c..065425b 100644
--- a/frontend/src/app.css
+++ b/frontend/src/app.css
@@ -11,7 +11,16 @@ body {
 .shell {
   max-width: 720px;
   margin: 2rem auto;
-  padding: 0 1rem;
+  padding: 0 1rem 3rem;
+}
+
+.hero h1 {
+  margin-bottom: 0.25rem;
+}
+
+.muted {
+  color: #555;
+  font-size: 0.95rem;
 }
 
 .card {
@@ -19,6 +28,12 @@ body {
   border: 1px solid #ddd;
   border-radius: 8px;
   padding: 1rem;
+  margin-top: 1rem;
+}
+
+.card h2 {
+  margin-top: 0;
+  font-size: 1.1rem;
 }
 
 .error {
@@ -27,4 +42,49 @@ body {
 
 pre {
   overflow: auto;
+  font-size: 0.85rem;
+}
+
+.form {
+  display: grid;
+  gap: 0.75rem;
+}
+
+.form label {
+  display: grid;
+  gap: 0.25rem;
+  font-size: 0.9rem;
+}
+
+.form input {
+  padding: 0.5rem 0.6rem;
+  border: 1px solid #ccc;
+  border-radius: 6px;
+  font: inherit;
+}
+
+button {
+  padding: 0.55rem 1rem;
+  border: none;
+  border-radius: 6px;
+  background: #1a4d8f;
+  color: #fff;
+  font: inherit;
+  cursor: pointer;
+  width: fit-content;
+}
+
+button:disabled {
+  opacity: 0.6;
+  cursor: wait;
+}
+
+button.secondary {
+  background: #eee;
+  color: #222;
+  border: 1px solid #ccc;
+}
+
+.session p {
+  margin: 0.35rem 0;
 }