feat(git): expand core git repository management features

This update significantly expands the available Git functionality by adding robust support for initializing repositories, managing remotes, and improving complex workflow operations like merging and reverting commits. New API endpoints are exposed across the backend and frontend to handle remote setup, branch tracking, and conflict resolution workflows.

- Added full remote management capabilities (add, update, remove).
- Implemented advanced merge strategies and commit reversion logic.
- Introduced a dedicated UI component for synchronization settings.

docs/api-contract.md

@@ -15,6 +15,9 @@ interface GitStatus {
   behind: number;
   files: GitFileStatus[];
   clean: boolean;
+  rebase_in_progress: boolean;
+  cherry_pick_in_progress: boolean;
+  merge_in_progress: boolean;
 }
 
 interface GitFileStatus {
@@ -56,19 +59,33 @@ interface GitRepositoryFile {
 
 ## Commands
 
+The command list below includes the repository-management and synchronization API. The TypeScript wrappers in `src/lib/git.ts` are the authoritative full list.
+
 - `open_repository(path: string): Promise<GitStatus>`
+- `init_repository(path: string, initialBranch?: string): Promise<GitStatus>`
+- `clone_repository(...): Promise<RepositoryBundle>`
 - `get_status(path: string): Promise<GitStatus>`
 - `list_branches(path: string): Promise<GitBranch[]>`
+- `list_remotes(path: string): Promise<GitRemote[]>`
+- `add_remote(path: string, name: string, url: string): Promise<GitRemote[]>`
+- `update_remote(path: string, name: string, url: string): Promise<GitRemote[]>`
+- `remove_remote(path: string, name: string): Promise<GitRemote[]>`
+- `set_branch_upstream(path: string, branch: string, upstream?: string): Promise<GitStatus>`
+- `delete_remote_branch(path: string, remote: string, branch: string): Promise<GitStatus>`
 - `checkout_branch(path: string, branch: string): Promise<GitStatus>`
 - `stage_files(path: string, files: string[]): Promise<GitStatus>`
 - `unstage_files(path: string, files: string[]): Promise<GitStatus>`
 - `restore_files(path: string, files: string[], staged: boolean): Promise<GitStatus>`
 - `commit(path: string, message: string): Promise<GitStatus>`
-- `pull(path: string): Promise<GitStatus>`
-- `push(path: string): Promise<GitStatus>`
+- `fetch(path: string, prune?: boolean, remote?: string): Promise<GitStatus>`
+- `pull(path: string, strategy?: "merge" | "rebase" | "ff-only", remote?: string, branch?: string): Promise<GitStatus>`
+- `push(path: string, forceWithLease?: boolean, remote?: string): Promise<GitStatus>`
 - `list_commits(path: string, limit?: number): Promise<GitCommit[]>`
 - `restore_to_commit(path: string, commit: string): Promise<GitStatus>`
 - `restore_file_from_commit(path: string, commit: string, file: string): Promise<GitStatus>` (the `file` argument can also be a folder path)
-- `merge_branch(path: string, branch: string): Promise<GitStatus>`
+- `merge_branch(path: string, branch: string, strategy?: "default" | "squash" | "ff-only" | "no-ff"): Promise<GitStatus>`
+- `merge_continue(path: string): Promise<GitStatus>`
+- `merge_abort(path: string): Promise<GitStatus>`
+- `revert_commit(path: string, commit: string): Promise<GitStatus>`
 - `list_repository_files(path: string): Promise<GitRepositoryFile[]>`
 - `list_file_history(path: string, file: string, limit?: number): Promise<GitCommit[]>` (the `file` argument can also be a folder path)