feat(app): Trigger-CRUD-Section in Settings + nested-Scroll-Fix

Settings hatte zwei Probleme:

1) Gedächtnis-Liste scrollte nur runter, nicht hoch. Klassisches Android
   nested-Scroll-Problem: aeussere ScrollView + innere FlatList mit
   fixer height:600 = nur eine Richtung wird respektiert.

   Fix: outer ScrollView mit scrollEnabled=false wenn die Section eine
   eigene voll-hoch-scrollende Sub-Liste hat (memory/triggers). Plus
   dynamische Hoehe via useWindowDimensions (winHeight - 220 statt
   hardcoded 600) damit MemoryBrowser sauber den verfuegbaren Platz
   nutzt.

2) Trigger waren bisher nur via Diagnostic-Tab editierbar — keine App-
   side CRUD. Stefan wollte das.

   Neu: TriggerBrowser-Komponente (analog MemoryBrowser-Struktur)
   - Liste aller Trigger mit Filter (alle/aktive/inaktive)
   - Toggle aktiv/inaktiv via Switch direkt in der Zeile
   - Tap oeffnet TriggerEditModal (Nachricht/Condition/fires_at/intervals
     editieren, Loeschen-Knopf mit Confirm)
   - "+ Neu"-Knopf oeffnet TriggerNewModal mit Type-Switch (Watcher/Timer),
     Watcher zeigt Hinweis auf verfuegbare Funktionen + Variablen
   - Live Reload-Button, Meta-Info (fire_count, last_fired_at, ...)

   brainApi um Trigger-Endpoints erweitert: listTriggers, getTrigger,
   createTimer, createWatcher, updateTrigger (patch), deleteTrigger,
   getTriggerConditions, getTriggerLogs. Plus Trigger-Type-Definition.

Settings-Liste hat eine neue Section "⏰ Trigger" zwischen Gedaechtnis
und Protokoll.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

android/src/services/brainApi.ts

@@ -121,6 +121,24 @@ export interface Memory {
   attachments?: MemoryAttachment[];
 }
 
+/** Trigger-Manifest wie aus Brain `/triggers/list` zurueckkommt. */
+export interface Trigger {
+  name: string;
+  type: 'timer' | 'watcher' | string;
+  active: boolean;
+  author?: string;
+  message: string;
+  fires_at?: string;             // ISO, nur timer
+  condition?: string;            // nur watcher
+  check_interval_sec?: number;   // nur watcher
+  throttle_sec?: number;         // nur watcher
+  fire_count?: number;
+  last_fired_at?: string | null;
+  last_checked_at?: string | null;
+  created_at?: string;
+  updated_at?: string;
+}
+
 // ── Memory CRUD ──────────────────────────────────────────────────────
 
 export const brainApi = {
@@ -215,6 +233,74 @@ export const brainApi = {
       { expectBinary: true, timeoutMs: 60000 },
     );
   },
+
+  // ── Triggers ────────────────────────────────────────────────────────
+
+  /** Liste aller Trigger (aktive + inaktive). */
+  listTriggers(): Promise<Trigger[]> {
+    return _send('/triggers/list');
+  },
+
+  /** Einzelnen Trigger holen (inkl. fire_count, last_fired_at, ...). */
+  getTrigger(name: string): Promise<Trigger> {
+    return _send(`/triggers/${encodeURIComponent(name)}`);
+  },
+
+  /** Verfuegbare Condition-Variablen + Funktionen (fuer Watcher-Editor). */
+  getTriggerConditions(): Promise<{ variables: any[]; functions: any[] }> {
+    return _send('/triggers/conditions');
+  },
+
+  /** Trigger-Logs (last N Feuerungen). */
+  getTriggerLogs(name: string, limit: number = 50): Promise<any[]> {
+    return _send(`/triggers/${encodeURIComponent(name)}/logs?limit=${limit}`);
+  },
+
+  /** Timer anlegen. fires_at = ISO timestamp (UTC). */
+  createTimer(body: { name: string; fires_at: string; message: string; author?: string }): Promise<Trigger> {
+    return _send('/triggers/timer', {
+      method: 'POST',
+      body: { author: 'app', ...body },
+    });
+  },
+
+  /** Watcher anlegen. */
+  createWatcher(body: {
+    name: string;
+    condition: string;
+    message: string;
+    check_interval_sec?: number;
+    throttle_sec?: number;
+    author?: string;
+  }): Promise<Trigger> {
+    return _send('/triggers/watcher', {
+      method: 'POST',
+      body: { author: 'app', ...body },
+    });
+  },
+
+  /** Trigger patchen (active/message/condition/throttle/interval/fires_at). */
+  updateTrigger(name: string, body: Partial<{
+    active: boolean;
+    message: string;
+    condition: string;
+    throttle_sec: number;
+    check_interval_sec: number;
+    fires_at: string;
+  }>): Promise<Trigger> {
+    return _send(`/triggers/${encodeURIComponent(name)}`, {
+      method: 'PATCH',
+      body,
+    });
+  },
+
+  /** Trigger loeschen. */
+  deleteTrigger(name: string): Promise<{ deleted: string }> {
+    return _send(`/triggers/${encodeURIComponent(name)}`, {
+      method: 'DELETE',
+      timeoutMs: 15000,
+    });
+  },
 };
 
 export default brainApi;