Make worktree removal idempotent by pruning and cleaning up stale directories instead of throwing on failure

src/git.ts

@@ -60,11 +60,15 @@ export async function createWorktree(branch: string, worktreePath: string, cwd:
   }
 }
 
-/** Remove a worktree. */
+/** Remove a worktree. Silently succeeds if the worktree is already gone. */
 export async function removeWorktree(worktreePath: string, cwd: string): Promise<void> {
   const result = await $`git worktree remove ${worktreePath} --force`.cwd(cwd).nothrow().quiet()
   if (result.exitCode !== 0) {
-    throw new Error(`Failed to remove worktree: ${result.stderr.toString().trim()}`)
+    // Worktree may already be gone or stale — prune and clean up the directory
+    await $`git worktree prune`.cwd(cwd).nothrow().quiet()
+    if (existsSync(worktreePath)) {
+      await rm(worktreePath, { recursive: true })
+    }
   }
 }