Fix completion actions: default to PR and support remote repos (#21)

* Fix completion actions: default to PR and support remote repos

- Change default completion action from 'branch' to 'pr' for tasks
  using daemon working directory
- Allow PR completion action to work without target_repo_path if the
  worktree already has an origin remote configured (e.g., when cloned
  from a remote URL)
- Update create_pull_request to accept optional target_repo parameter

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Add dismiss functionality for completed standalone tasks

## Changes

### Backend
- Add 'hidden' field to Task model (models.rs)
- Add database migration for hidden column (20250122000000_add_task_hidden.sql)
- Update task listing queries to include hidden field and filter out hidden tasks
- Update update_task_for_owner to handle hidden field

### Frontend
- Add hidden field to TaskSummary interface (api.ts)
- Add dismissTask API function (api.ts)
- Add hideTask function to useTasks hook
- Add Dismiss button to TaskList for completed standalone tasks
- Wire up onDismiss handler in mesh.tsx route

## Behavior
- Completed standalone tasks (tasks without a contract) show a "Dismiss" button
- Dismissing a task sets hidden=true and removes it from the task list
- Hidden tasks are filtered out by default in all task listing queries

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/makima/src/server/handlers/mesh_chat.rs b/makima/src/server/handlers/mesh_chat.rs
index 0fc5513..8e134bd 100644
--- a/makima/src/server/handlers/mesh_chat.rs
+++ b/makima/src/server/handlers/mesh_chat.rs
@@ -995,8 +995,8 @@ async fn handle_mesh_request(
                 };
                 (Some(action), target)
             } else if is_daemon_working_dir {
-                // No merge_mode but using daemon working dir - default to "branch"
-                (Some("branch".to_string()), repository_url.clone())
+                // No merge_mode but using daemon working dir - default to "pr"
+                (Some("pr".to_string()), repository_url.clone())
             } else {
                 (None, None)
             };