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>

4 files changed, 9 insertions, 2 deletions

diff --git a/makima/src/db/models.rs b/makima/src/db/models.rs
index 3e6997f..65f7168 100644
--- a/makima/src/db/models.rs
+++ b/makima/src/db/models.rs
@@ -1348,6 +1348,8 @@ pub struct ContractSummary {
     pub contract_type: String,
     pub phase: String,
     pub status: String,
+    /// Supervisor task ID for contract orchestration
+    pub supervisor_task_id: Option<Uuid>,
     pub file_count: i64,
     pub task_count: i64,
     pub repository_count: i64,
diff --git a/makima/src/db/repository.rs b/makima/src/db/repository.rs
index 36e6bc1..536bc9b 100644
--- a/makima/src/db/repository.rs
+++ b/makima/src/db/repository.rs
@@ -2190,7 +2190,7 @@ pub async fn list_contracts_for_owner(
         r#"
         SELECT
             c.id, c.name, c.description, c.contract_type, c.phase, c.status,
-            c.version, c.created_at,
+            c.supervisor_task_id, c.version, c.created_at,
             (SELECT COUNT(*) FROM files WHERE contract_id = c.id) as file_count,
             (SELECT COUNT(*) FROM tasks WHERE contract_id = c.id) as task_count,
             (SELECT COUNT(*) FROM contract_repositories WHERE contract_id = c.id) as repository_count
@@ -2214,7 +2214,7 @@ pub async fn get_contract_summary_for_owner(
         r#"
         SELECT
             c.id, c.name, c.description, c.contract_type, c.phase, c.status,
-            c.version, c.created_at,
+            c.supervisor_task_id, c.version, c.created_at,
             (SELECT COUNT(*) FROM files WHERE contract_id = c.id) as file_count,
             (SELECT COUNT(*) FROM tasks WHERE contract_id = c.id) as task_count,
             (SELECT COUNT(*) FROM contract_repositories WHERE contract_id = c.id) as repository_count
diff --git a/makima/src/server/handlers/contracts.rs b/makima/src/server/handlers/contracts.rs
index 4f4a94b..4524860 100644
--- a/makima/src/server/handlers/contracts.rs
+++ b/makima/src/server/handlers/contracts.rs
@@ -371,6 +371,7 @@ pub async fn create_contract(
                             contract_type: contract.contract_type,
                             phase: contract.phase,
                             status: contract.status,
+                            supervisor_task_id: contract.supervisor_task_id,
                             file_count: 0,
                             task_count: 0,
                             repository_count: 0,
@@ -391,6 +392,7 @@ pub async fn create_contract(
                             contract_type: contract.contract_type,
                             phase: contract.phase,
                             status: contract.status,
+                            supervisor_task_id: contract.supervisor_task_id,
                             file_count: 0,
                             task_count: 0,
                             repository_count: 0,
@@ -518,6 +520,7 @@ pub async fn update_contract(
                     contract_type: contract.contract_type,
                     phase: contract.phase,
                     status: contract.status,
+                    supervisor_task_id: contract.supervisor_task_id,
                     file_count: 0,
                     task_count: 0,
                     repository_count: 0,
@@ -1398,6 +1401,7 @@ pub async fn change_phase(
                     contract_type: updated_contract.contract_type,
                     phase: updated_contract.phase,
                     status: updated_contract.status,
+                    supervisor_task_id: updated_contract.supervisor_task_id,
                     file_count: 0,
                     task_count: 0,
                     repository_count: 0,
diff --git a/makima/src/server/handlers/mesh.rs b/makima/src/server/handlers/mesh.rs
index f710be1..e9a421c 100644
--- a/makima/src/server/handlers/mesh.rs
+++ b/makima/src/server/handlers/mesh.rs
@@ -3447,6 +3447,7 @@ pub async fn create_adhoc_task(
         contract_type: contract.contract_type,
         phase: contract.phase,
         status: contract.status,
+        supervisor_task_id: contract.supervisor_task_id,
         file_count: 0,
         task_count: 1,
         repository_count: 0,