feat(git): Add comprehensive worktree management capabilities

This update introduces full support for Git worktrees, allowing users to manage multiple isolated working copies within a single repository. This includes new functionality to list, add, remove, move, lock, and repair worktrees, significantly enhancing the repository's capability to handle parallel development streams.

- Added `GitWorktree` structure definition across API contracts and Rust backend
- Implemented full CRUD operations for worktrees in Tauri commands
- Updated UI components (App.svelte, BranchPanel.svelte) to expose worktree management dialog

src/lib/git.ts

@@ -21,6 +21,7 @@ import type {
   GitStash,
   GitStatus,
   GitTag,
+  GitWorktree,
   LocalModelOption,
   PatchApplyAction,
   RepositoryBundle,
@@ -116,6 +117,56 @@ export function deleteBranch(path: string, branch: string, force = false): Promi
   return invoke<GitStatus>("delete_branch", { path, branch, force });
 }
 
+export function listWorktrees(path: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("list_worktrees", { path });
+}
+
+export function addWorktree(
+  path: string,
+  worktreePath: string,
+  options: {
+    branch?: string;
+    newBranch?: string;
+    startPoint?: string;
+    detached?: boolean;
+    lock?: boolean;
+  } = {},
+): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("add_worktree", {
+    path,
+    worktreePath,
+    branch: options.branch ?? null,
+    newBranch: options.newBranch ?? null,
+    startPoint: options.startPoint ?? null,
+    detached: options.detached ?? false,
+    lock: options.lock ?? false,
+  });
+}
+
+export function removeWorktree(path: string, worktreePath: string, force = false): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("remove_worktree", { path, worktreePath, force });
+}
+
+export function moveWorktree(path: string, worktreePath: string, destination: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("move_worktree", { path, worktreePath, destination });
+}
+
+export function lockWorktree(path: string, worktreePath: string, reason?: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("lock_worktree", { path, worktreePath, reason: reason?.trim() || null });
+}
+
+export function unlockWorktree(path: string, worktreePath: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("unlock_worktree", { path, worktreePath });
+}
+
+export function pruneWorktrees(path: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("prune_worktrees", { path });
+}
+
+export function repairWorktree(path: string, worktreePath: string): Promise<GitWorktree[]> {
+  return invoke<GitWorktree[]>("repair_worktree", { path, worktreePath });
+}
+
 export function listTags(path: string): Promise<GitTag[]> {
   return invoke<GitTag[]>("list_tags", { path });
 }