Clean up mesh page (#6)

* Filter mesh page task list to show only supervisor tasks

- Add `isSupervisor` filter to rootTasks filter in TaskList component
- Only supervisor tasks will appear in the mesh page task list
- Regular tasks are now hidden from the main view
- Update empty state messages to reflect supervisor-only filtering
- When clicking a supervisor task, its detail still shows orchestrated tasks

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

* Add supervisor task button to workflow board contract cards

- Add supervisorTaskId field to ContractSummary type in backend and frontend
- Update SQL queries in repository.rs to include supervisor_task_id
- Add navigation button (▶) to WorkflowContractCard that links to /mesh/{supervisorTaskId}
- Button only shows when contract has a supervisorTaskId
- Button has tooltip "Open Supervisor Task" and stops propagation to avoid triggering card click

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

* Add full task page navigation button to TaskTree rows

Add a hover-visible arrow icon (↗) to each task row in the TaskTree
component that links to the full task page (/tasks/{taskId}). The button:
- Appears on hover using opacity transition
- Stops event propagation to avoid triggering parent onSelect
- Matches existing hover styling patterns with the #75aafc color scheme

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, 0 deletions

diff --git a/makima/frontend/src/lib/api.ts b/makima/frontend/src/lib/api.ts
index abf72b8..daa2b5c 100644
--- a/makima/frontend/src/lib/api.ts
+++ b/makima/frontend/src/lib/api.ts
@@ -1462,6 +1462,8 @@ export interface ContractSummary {
   contractType: ContractType;
   phase: ContractPhase;
   status: ContractStatus;
+  /** Supervisor task ID for contract orchestration */
+  supervisorTaskId: string | null;
   fileCount: number;
   taskCount: number;
   repositoryCount: number;