feat(git): add rebase workflow with UI state handling

This introduces Git rebase commands (start, continue, abort) and
exposes whether a rebase is currently in progress via the status
payload. The UI now blocks committing during an active rebase and
shows a dedicated rebase notice with continue/abort actions.

- Add tauri commands for rebase operations and status detection
- Update frontend to render rebase state and controls
- Adjust conflict/resolution messaging and related UI styling

src-tauri/src/main.rs

@@ -11,10 +11,10 @@ use git::{
     cred_delete, cred_load, cred_save, delete_branch, 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, 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,
+    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,
 };
 
 fn main() {
@@ -55,6 +55,9 @@ fn main() {
             restore_to_commit,
             restore_file_from_commit,
             merge_branch,
+            rebase_branch,
+            rebase_continue,
+            rebase_abort,
             list_repository_files,
             open_repository_bundle,
             list_file_history,