feat(git): add tag management and cherry-pick workflow

This update extends the Git backend and UI to support listing,
creating, deleting, and pushing tags. It also adds cherry-pick
commands with proper in-progress detection and conflict handling, and
prevents other operations while a cherry-pick is active.

- Add GitTag model, tag listing, and tag CRUD/push commands
- Implement cherry-pick start/continue/abort with status tracking
- Update UI to display tags and gate actions during cherry-pick

src-tauri/src/main.rs

@@ -6,16 +6,17 @@ mod git;
 use badge::set_sync_badge;
 use git::{
     SearchCancellationState, apply_file_patch, cancel_code_search, cancel_file_history,
-    checkout_branch, clone_repository, commit, commit_ai_generate, commit_ai_load,
-    commit_ai_local_models, commit_ai_status, compare_commits, compare_file_to_head,
-    compare_file_to_parent, create_branch, cred_delete, cred_load, cred_save, delete_branch,
+    checkout_branch, cherry_pick_abort, cherry_pick_commit, cherry_pick_continue,
+    clone_repository, commit, commit_ai_generate, commit_ai_load, commit_ai_local_models,
+    commit_ai_status, compare_commits, compare_file_to_head, compare_file_to_parent,
+    create_branch, create_tag, cred_delete, cred_load, cred_save, delete_branch, delete_tag,
     diff_file_against_working_tree, fetch, get_file_patch, get_remote_url, get_status,
     list_branches, list_commits, list_file_history, list_repository_files, list_stashes,
-    merge_branch, open_repo_in_explorer, open_repository, open_repository_bundle,
-    open_repository_file, pull, push, read_conflict, rebase_abort, rebase_branch, rebase_continue,
-    rename_branch, resolve_conflict, resolve_conflict_side, restore_file_from_commit,
-    restore_files, restore_to_commit, search_code_introductions, stage_files, stash_apply,
-    stash_drop, stash_pop, stash_push, unstage_files,
+    list_tags, merge_branch, open_repo_in_explorer, open_repository, open_repository_bundle,
+    open_repository_file, pull, push, push_tag, read_conflict, rebase_abort, rebase_branch,
+    rebase_continue, rename_branch, resolve_conflict, resolve_conflict_side,
+    restore_file_from_commit, restore_files, restore_to_commit, search_code_introductions,
+    stage_files, stash_apply, stash_drop, stash_pop, stash_push, unstage_files,
 };
 
 fn main() {
@@ -36,6 +37,13 @@ fn main() {
             create_branch,
             rename_branch,
             delete_branch,
+            list_tags,
+            create_tag,
+            delete_tag,
+            push_tag,
+            cherry_pick_commit,
+            cherry_pick_continue,
+            cherry_pick_abort,
             stage_files,
             unstage_files,
             stash_push,