feat(electrobun): final 5% — full integration, real data, polish

1. Claude CLI: additionalDirectories + worktreeName passthrough
2. Agent-store: reads settings (default_cwd, provider model, permission)
3. Project hydration: SQLite replaces hardcoded PROJECTS, add/remove UI
4. Group hydration: SQLite groups, add/delete in sidebar
5. Terminal auto-spawn: reads default_cwd from settings
6. Context tab: real tokens from agent-store, file refs, turn count
7. Memory tab: Memora DB integration (read-only, graceful if missing)
8. Docs tab: markdown viewer (files.list + files.read + inline renderer)
9. SSH tab: CRUD connections, spawn PTY with ssh command
10. Error handling: global unhandledrejection → toast notifications
11. Notifications: agent done/error/stall → toasts, 15min stall timer
12. Command palette: all 18 commands (was 10)

+1,198 lines, 13 files. Electrobun now 100% feature-complete vs Tauri v3.

ui-electrobun/src/mainview/agent-store.svelte.ts

@@ -43,6 +43,48 @@ interface StartOptions {
   permissionMode?: string;
   claudeConfigDir?: string;
   extraEnv?: Record<string, string>;
+  additionalDirectories?: string[];
+  worktreeName?: string;
+}
+
+// ── Toast callback (set by App.svelte) ────────────────────────────────────────
+
+type ToastFn = (message: string, variant: 'success' | 'warning' | 'error' | 'info') => void;
+let _toastFn: ToastFn | null = null;
+
+/** Register a toast callback for agent notifications. */
+export function setAgentToastFn(fn: ToastFn): void { _toastFn = fn; }
+
+function emitToast(message: string, variant: 'success' | 'warning' | 'error' | 'info') {
+  _toastFn?.(message, variant);
+}
+
+// ── Stall detection ───────────────────────────────────────────────────────────
+
+const stallTimers = new Map<string, ReturnType<typeof setTimeout>>();
+const DEFAULT_STALL_MS = 15 * 60 * 1000; // 15 minutes
+
+function resetStallTimer(sessionId: string, projectId: string): void {
+  const existing = stallTimers.get(sessionId);
+  if (existing) clearTimeout(existing);
+
+  const timer = setTimeout(() => {
+    stallTimers.delete(sessionId);
+    const session = sessions[sessionId];
+    if (session && session.status === 'running') {
+      emitToast(`Agent stalled on ${projectId} (no activity for 15 min)`, 'warning');
+    }
+  }, DEFAULT_STALL_MS);
+
+  stallTimers.set(sessionId, timer);
+}
+
+function clearStallTimer(sessionId: string): void {
+  const timer = stallTimers.get(sessionId);
+  if (timer) {
+    clearTimeout(timer);
+    stallTimers.delete(sessionId);
+  }
 }
 
 // ── Env var validation (Fix #14) ─────────────────────────────────────────────
@@ -153,6 +195,8 @@ function ensureListeners() {
     if (converted.length > 0) {
       session.messages = [...session.messages, ...converted];
       persistMessages(session);
+      // Reset stall timer on activity
+      resetStallTimer(payload.sessionId, session.projectId);
     }
   });
 
@@ -171,6 +215,15 @@ function ensureListeners() {
     // Persist on every status change
     persistSession(session);
 
+    // Emit toast notification on completion
+    if (session.status === 'done') {
+      clearStallTimer(payload.sessionId);
+      emitToast(`Agent completed on ${session.projectId}`, 'success');
+    } else if (session.status === 'error') {
+      clearStallTimer(payload.sessionId);
+      emitToast(`Agent error on ${session.projectId}: ${payload.error ?? 'unknown'}`, 'error');
+    }
+
     // Schedule cleanup after done/error (Fix #2)
     if (session.status === 'done' || session.status === 'error') {
       // Flush any pending message persistence immediately
@@ -366,6 +419,8 @@ export async function startAgent(
   // Read settings defaults if not explicitly provided (Fix #5)
   let permissionMode = options.permissionMode;
   let systemPrompt = options.systemPrompt;
+  let defaultModel = options.model;
+  let cwd = options.cwd;
   try {
     const { settings } = await appRpc.request['settings.getAll']({});
     if (!permissionMode && settings['permission_mode']) {
@@ -374,6 +429,17 @@ export async function startAgent(
     if (!systemPrompt && settings['system_prompt_template']) {
       systemPrompt = settings['system_prompt_template'];
     }
+    if (!cwd && settings['default_cwd']) {
+      cwd = settings['default_cwd'];
+    }
+    // Read default model from provider_settings if not specified
+    if (!defaultModel && settings['provider_settings']) {
+      try {
+        const providerSettings = JSON.parse(settings['provider_settings']);
+        const provConfig = providerSettings[provider];
+        if (provConfig?.defaultModel) defaultModel = provConfig.defaultModel;
+      } catch { /* ignore parse errors */ }
+    }
   } catch { /* use provided or defaults */ }
 
   // Create reactive session state
@@ -391,17 +457,18 @@ export async function startAgent(
     costUsd: 0,
     inputTokens: 0,
     outputTokens: 0,
-    model: options.model ?? 'claude-opus-4-5',
+    model: defaultModel ?? 'claude-opus-4-5',
   };
 
   projectSessionMap.set(projectId, sessionId);
+  resetStallTimer(sessionId, projectId);
 
   const result = await appRpc.request['agent.start']({
     sessionId,
     provider: provider as 'claude' | 'codex' | 'ollama',
     prompt,
-    cwd: options.cwd,
-    model: options.model,
+    cwd,
+    model: defaultModel,
     systemPrompt: systemPrompt,
     maxTurns: options.maxTurns,
     permissionMode: permissionMode,