Clean contract lifecycle: Add supervisor complete command (#13)

* feat: Add contract lifecycle management commands (complete and resume-contract)

Add supervisor commands for properly managing contract lifecycle:
- `makima supervisor complete` - Mark a contract as complete and stop the supervisor
- `makima supervisor resume-contract` - Resume a completed contract (reactivate it)

Also adds `api_key` field to TaskConfig for authenticated API calls.

This consolidates the lifecycle management features from the contract-lifecycle-cleanup branch.

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

* Fix: prevent supervisor auto-start for completed contracts

When viewing a completed contract, the supervisor was auto-starting
on component mount. This would resurrect completed contracts and
cause them to continue running.

Changes:
- Add contract.status !== 'completed' check to the auto-start condition
- Add contract.status to the useEffect dependency array

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

* Task completion checkpoint

---------

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

1 files changed, 35 insertions, 0 deletions

diff --git a/makima/src/daemon/api/supervisor.rs b/makima/src/daemon/api/supervisor.rs
index 9614cfc..bd3aefd 100644
--- a/makima/src/daemon/api/supervisor.rs
+++ b/makima/src/daemon/api/supervisor.rs
@@ -249,6 +249,41 @@ impl ApiClient {
             .await
     }
 
+    /// Mark a contract as complete.
+    /// This will update contract status to 'completed', stop the supervisor, and clean up worktrees.
+    pub async fn supervisor_complete(&self, contract_id: Uuid) -> Result<JsonValue, ApiError> {
+        #[derive(Serialize)]
+        #[serde(rename_all = "camelCase")]
+        struct CompleteContractRequest {
+            status: String,
+        }
+        let req = CompleteContractRequest {
+            status: "completed".to_string(),
+        };
+        self.put(&format!("/api/v1/contracts/{}", contract_id), &req)
+            .await
+    }
+
+    /// Resume a completed contract (reactivate it).
+    ///
+    /// This updates the contract status from 'completed' back to 'active'
+    /// and optionally respawns the supervisor task.
+    pub async fn supervisor_resume_contract(
+        &self,
+        contract_id: Uuid,
+    ) -> Result<JsonValue, ApiError> {
+        #[derive(Serialize)]
+        #[serde(rename_all = "camelCase")]
+        struct ResumeContractRequest {
+            status: String,
+        }
+        let req = ResumeContractRequest {
+            status: "active".to_string(),
+        };
+        self.put(&format!("/api/v1/contracts/{}", contract_id), &req)
+            .await
+    }
+
     /// Delete a task.
     pub async fn delete_task(&self, task_id: Uuid) -> Result<(), ApiError> {
         self.delete(&format!("/api/v1/mesh/tasks/{}", task_id)).await