Persoenliche Angaben: fehlende settings-Zeile ist ein gueltiger Zustand

Neu angelegte Benutzer hatten keine settings-Zeile - die legte bisher nur
die Migration von Hand fuer den Admin an, POST /admin/users dagegen nicht.
Der Code ging aber davon aus, dass die Zeile immer existiert:

- /vorlagen lieferte fuer neue Benutzer 500: die View greift auf
  settings.name zu, bekam aber undefined.
- PUT /api/v1/settings verwarf Schreibzugriffe stillschweigend: das blanke
  UPDATE traf null Zeilen und meldete trotzdem success.

Statt Platzhalter-Zeilen zu provisionieren ist "keine Zeile" jetzt ueberall
ein gueltiger Zustand - genau wie bei prompts, design und app_state:

- loadSettings() (neben loadPrompts()/loadDesign()) liefert {} statt
  undefined; alle sechs Lesestellen gehen darueber.
- PUT /api/v1/settings ist ein Upsert, GET liefert {} statt leerem Body.
- Chat-Tool bewerbung_detail: JOIN auf jobangebote zusaetzlich ueber
  j.user_id = b.user_id, wie derselbe JOIN an anderer Stelle.

Repariert auch bereits angelegte Benutzer ohne Backfill-Migration.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server.js

@@ -620,6 +620,22 @@ async function loadDesign() {
   }
 }
 
+// The user's personal details (Persönliche Angaben). A user who has never saved
+// the form has no settings row at all — that is a valid state, not an error, so
+// this returns an empty object rather than undefined. Same contract as
+// loadPrompts()/loadDesign(): "no row" means "nothing set yet". Every consumer
+// (views, PDF generation, KI context) reads individual fields off the result,
+// so they all degrade to empty instead of crashing.
+async function loadSettings() {
+  try {
+    const row = await dbGet('SELECT * FROM settings WHERE user_id = ?', [currentUserId()]);
+    return row || {};
+  } catch (e) {
+    console.error('Konnte Persönliche Angaben nicht laden:', e.message);
+    return {};
+  }
+}
+
 // Match an incoming message to an application: first via In-Reply-To/References
 // pointing at one of our sent messages, then by sender = a previous recipient.
 async function matchBewerbung(msg) {
@@ -779,7 +795,7 @@ async function runGeneration(bewerbungId, options = {}) {
     if (!bewerbung) return;
     const basisDokumente = await dbAll('SELECT * FROM basis_dokumente WHERE user_id = ? ORDER BY id ASC', [U]);
     const basisAnhaenge = await dbAll('SELECT * FROM basis_anhaenge WHERE user_id = ? ORDER BY id ASC', [U]);
-    const settings = await dbGet('SELECT * FROM settings WHERE user_id = ?', [U]);
+    const settings = await loadSettings();
     const prompts = await loadPrompts();
     const design = await loadDesign();
 
@@ -1317,8 +1333,8 @@ initializeDatabase().then(async () => {
   // Get settings
   app.get('/api/settings', async (req, res) => {
     try {
-      const settings = await dbGet('SELECT * FROM settings WHERE user_id = ?', [uid()]);
-      res.json(settings || {});
+      const settings = await loadSettings();
+      res.json(settings);
     } catch (error) {
       console.error('Error getting settings:', error);
       res.status(500).json({ error: 'Serverfehler' });
@@ -1817,7 +1833,7 @@ initializeDatabase().then(async () => {
       if (!bewerbung) return res.status(404).json({ error: 'Bewerbung nicht gefunden' });
       const orig = await dbGet('SELECT * FROM emails WHERE id = ? AND bewerbung_id = ? AND user_id = ?', [req.body.email_id, id, uid()]);
       if (!orig) return res.status(404).json({ error: 'Nachricht nicht gefunden' });
-      const settings = await dbGet('SELECT * FROM settings WHERE user_id = ?', [uid()]);
+      const settings = await loadSettings();
 
       const draft = await generateEmailReply({
         incoming: { from: orig.from_addr, subject: orig.subject, text: emailPlainText(orig) },
@@ -2136,7 +2152,7 @@ initializeDatabase().then(async () => {
       res.render('vorlagen', {
         basisDokumente,
         basisAnhaenge,
-        settings: await dbGet('SELECT * FROM settings WHERE user_id = ?', [uid()]),
+        settings: await loadSettings(),
         prompts: promptStore.list(await loadPrompts()),
         designFelder: designStore.list(design),
         designAngepasst: designStore.isAngepasst(design),
@@ -2276,7 +2292,7 @@ initializeDatabase().then(async () => {
       // Only known design keys from the query are honoured; design.settings()
       // drops anything invalid.
       const design = { ...gespeichert, ...req.query };
-      const settings = await dbGet('SELECT * FROM settings WHERE user_id = ?', [uid()]);
+      const settings = await loadSettings();
       const pdfs = renderDesignVorschau({
         settings,
         signatur: loadSignatur(),
@@ -2956,7 +2972,7 @@ initializeDatabase().then(async () => {
   // assistant answer is streamed back via Server-Sent Events.
   async function gatherChatContext() {
     const [settings, profilRows, prompts] = await Promise.all([
-      dbGet('SELECT name FROM settings WHERE user_id = ?', [uid()]),
+      loadSettings(),
       dbAll(
         `SELECT inhalt FROM basis_dokumente
           WHERE user_id = ? AND typ IN ('Lebenslauf', 'Profil/Kurzprofil') AND inhalt IS NOT NULL AND inhalt != ''
@@ -2970,7 +2986,7 @@ initializeDatabase().then(async () => {
     // so the system prompt stays tiny regardless of how many bewerbungen exist.
     const profil = (profilRows.map((r) => (r.inhalt || '').trim()).join('\n\n---\n\n')).slice(0, 1800);
     const heute = new Date().toLocaleDateString('de-DE', { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' });
-    return { heute, profil, prompts, settings: settings || {} };
+    return { heute, profil, prompts, settings };
   }
 
   // Ollama tool definitions the assistant can call to look up application data.
@@ -3065,7 +3081,7 @@ initializeDatabase().then(async () => {
                 b.interne_notizen, b.stellenbeschreibung, b.quelle_url,
                 j.kontakt_email AS ja_kontakt, j.ansprechpartner AS ja_ansprech, j.beschreibung AS ja_beschreibung
            FROM bewerbungen b
-           LEFT JOIN jobangebote j ON j.verknuepfte_bewerbung_id = b.id
+           LEFT JOIN jobangebote j ON j.verknuepfte_bewerbung_id = b.id AND j.user_id = b.user_id
           WHERE b.id = ? AND b.user_id = ?`,
         [id, uid()]
       );