feat(electrobun): ProjectWizard — 3-step project creation with 5 source types

Step 1 — Source: local folder (path browser + validation), git clone,
GitHub URL, template (4 built-in), remote SSH
Step 2 — Configure: name, branch selector, worktree toggle, group, icon, shell
Step 3 — Agent: provider, model, permission mode, system prompt, auto-start

- ProjectWizard.svelte: 3-step wizard with display toggle (rule 55)
- PathBrowser.svelte: inline directory browser with breadcrumbs + shortcuts
- git-handlers.ts: git.branches + git.clone RPC handlers
- files.statEx RPC: path validation + git detection + writable check
- 39 new i18n keys, 172 total TranslationKey entries
- App.svelte: wizard overlay replaces simple add-project card

ui-electrobun/src/shared/pty-rpc-schema.ts

@@ -133,6 +133,19 @@ export type PtyRPCRequests = {
     params: { path: string };
     response: { mtimeMs: number; size: number; error?: string };
   };
+  /** Extended stat — directory check, git detection, writability. Used by ProjectWizard. */
+  "files.statEx": {
+    params: { path: string };
+    response: {
+      exists: boolean;
+      isDirectory: boolean;
+      isGitRepo: boolean;
+      gitBranch?: string;
+      size?: number;
+      writable?: boolean;
+      error?: string;
+    };
+  };
   /** Write text content to a file (atomic temp+rename). */
   "files.write": {
     params: { path: string; content: string };
@@ -196,6 +209,34 @@ export type PtyRPCRequests = {
     response: { ok: boolean; project?: { id: string; config: string }; error?: string };
   };
 
+  // ── Git RPC ──────────────────────────────────────────────────────────────────
+
+  /** List branches in a git repository. */
+  "git.branches": {
+    params: { path: string };
+    response: { branches: string[]; current: string; error?: string };
+  };
+  /** Clone a git repository. */
+  "git.clone": {
+    params: { url: string; target: string; branch?: string };
+    response: { ok: boolean; error?: string };
+  };
+
+  // ── Project templates RPC ───────────────────────────────────────────────────
+
+  /** Return available project templates. */
+  "project.templates": {
+    params: Record<string, never>;
+    response: {
+      templates: Array<{
+        id: string;
+        name: string;
+        description: string;
+        icon: string;
+      }>;
+    };
+  };
+
   // ── Window control RPC ─────────────────────────────────────────────────────
 
   /** Minimize the main window. */