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/locales/en.json

@@ -146,5 +146,44 @@
   "palette.zoomOut": "Zoom Out",
   "palette.addProjectDesc": "Open a project directory",
   "palette.clearAgentDesc": "Reset agent session",
-  "palette.changeThemeDesc": "Switch between 17 themes"
+  "palette.changeThemeDesc": "Switch between 17 themes",
+
+  "wizard.title": "Add Project",
+  "wizard.step1.title": "Choose Source",
+  "wizard.step1.local": "Local Folder",
+  "wizard.step1.gitClone": "Git Clone",
+  "wizard.step1.github": "GitHub Repository",
+  "wizard.step1.template": "From Template",
+  "wizard.step1.remote": "Remote (SSH)",
+  "wizard.step1.pathLabel": "Project Path",
+  "wizard.step1.pathPlaceholder": "/home/user/projects/my-app",
+  "wizard.step1.browse": "Browse",
+  "wizard.step1.validDir": "Valid directory",
+  "wizard.step1.invalidPath": "Path does not exist",
+  "wizard.step1.notDir": "Path is not a directory",
+  "wizard.step1.gitDetected": "Git repository detected",
+  "wizard.step1.repoUrl": "Repository URL",
+  "wizard.step1.targetDir": "Clone to",
+  "wizard.step1.githubRepo": "owner/repo",
+  "wizard.step2.title": "Configure",
+  "wizard.step2.name": "Project Name",
+  "wizard.step2.branch": "Branch",
+  "wizard.step2.worktree": "Use worktrees for agent sessions",
+  "wizard.step2.group": "Group",
+  "wizard.step2.icon": "Icon",
+  "wizard.step2.shell": "Shell",
+  "wizard.step3.title": "Agent Settings",
+  "wizard.step3.provider": "AI Provider",
+  "wizard.step3.model": "Model",
+  "wizard.step3.permission": "Permission Mode",
+  "wizard.step3.systemPrompt": "System Prompt",
+  "wizard.step3.autoStart": "Start agent after creation",
+  "wizard.back": "Back",
+  "wizard.next": "Next",
+  "wizard.skip": "Skip",
+  "wizard.create": "Create Project",
+  "wizard.cloning": "Cloning repository...",
+  "wizard.step1.hostLabel": "Host",
+  "wizard.step1.userLabel": "User",
+  "wizard.step2.newGroup": "New group"
 }