feat: add rename branch functionality with UI integration

packages/desktop/src-tauri/src/commands/git.rs

@@ -1696,6 +1696,22 @@ pub async fn create_branch(
     Ok(())
 }
 
+#[tauri::command]
+pub async fn rename_branch(
+    directory: String,
+    old_name: String,
+    new_name: String,
+    state: State<'_, DesktopRuntime>,
+) -> Result<(), String> {
+    let root = validate_git_path(&directory, state.settings())
+        .await
+        .map_err(|e| e.to_string())?;
+    run_git(&["branch", "-m", &old_name, &new_name], &root)
+        .await
+        .map_err(|e| e.to_string())?;
+    Ok(())
+}
+
 #[tauri::command]
 pub async fn get_git_log(
     directory: String,

packages/desktop/src-tauri/src/main.rs

@@ -30,7 +30,7 @@ use axum::{
 };
 use commands::files::{create_directory, exec_commands, list_directory, read_file, search_files, write_file};
 use commands::git::{
-    add_git_worktree, check_is_git_repository, checkout_branch, create_branch, create_git_commit,
+    add_git_worktree, check_is_git_repository, checkout_branch, create_branch, create_git_commit, rename_branch,
     create_git_identity, delete_git_branch, delete_git_identity, delete_remote_branch,
     ensure_openchamber_ignored, generate_commit_message, get_commit_files,
     get_current_git_identity, get_git_branches, get_git_diff, get_git_file_diff,
@@ -863,6 +863,7 @@ fn main() {
             git_fetch,
             checkout_branch,
             create_branch,
+            rename_branch,
             get_git_log,
             get_commit_files,
             get_git_identities,

packages/desktop/src/api/git.ts

@@ -183,6 +183,15 @@ export const createDesktopGitAPI = (): GitAPI => ({
     return { success: true, branch: name };
   },
 
+  async renameBranch(directory: string, oldName: string, newName: string): Promise<{ success: boolean; branch: string }> {
+    await safeGitInvoke<void>('rename_branch', {
+      directory,
+      oldName,
+      newName
+    });
+    return { success: true, branch: newName };
+  },
+
   async getGitLog(directory: string, options?: GitLogOptions): Promise<GitLogResponse> {
     return safeGitInvoke<GitLogResponse>('get_git_log', {
       directory,