feat(KB-622): unify steeringComments and comments into single comments field

- Merge steeringComments and comments into unified comments field in Task type
- Update TaskStore to use single comments array instead of separate steeringComments
- Add database migration to convert existing steeringComments to comments
- Update executor to inject all comments into AI execution context
- Update dashboard SteeringTab to use unified comments API
- Update CLI task steer command to use comments field
- Update PR comment handler to add comments via unified API

packages/dashboard/src/routes.test.ts

@@ -71,7 +71,7 @@ function createMockStore(overrides: Partial<TaskStore> = {}): TaskStore {
     getGlobalSettingsStore: vi.fn().mockReturnValue(createMockGlobalSettingsStore()),
     logEntry: vi.fn().mockResolvedValue(undefined),
     getAgentLogs: vi.fn().mockResolvedValue([]),
-    addSteeringComment: vi.fn(),
+    addComment: vi.fn(),
     addTaskComment: vi.fn(),
     updateTaskComment: vi.fn(),
     deleteTaskComment: vi.fn(),
@@ -1858,7 +1858,7 @@ describe("Pause/Unpause endpoints", () => {
     it("adds a steering comment to a task", async () => {
       const mockComment = {
         id: "FN-001",
-        steeringComments: [
+        comments: [
           {
             id: "1234567890-abc123",
             text: "Please handle the edge case",
@@ -1867,7 +1867,7 @@ describe("Pause/Unpause endpoints", () => {
           },
         ],
       };
-      (store.addSteeringComment as ReturnType<typeof vi.fn>).mockResolvedValue(mockComment);
+      (store.addComment as ReturnType<typeof vi.fn>).mockResolvedValue(mockComment);
 
       const res = await REQUEST(
         buildApp(),
@@ -1879,7 +1879,7 @@ describe("Pause/Unpause endpoints", () => {
 
       expect(res.status).toBe(200);
       expect(res.body).toEqual(mockComment);
-      expect(store.addSteeringComment).toHaveBeenCalledWith(
+      expect(store.addComment).toHaveBeenCalledWith(
         "KB-001",
         "Please handle the edge case",
         "user"
@@ -1926,7 +1926,7 @@ describe("Pause/Unpause endpoints", () => {
     it("returns 404 when task not found", async () => {
       const error = new Error("Task not found") as Error & { code?: string };
       error.code = "ENOENT";
-      (store.addSteeringComment as ReturnType<typeof vi.fn>).mockRejectedValue(error);
+      (store.addComment as ReturnType<typeof vi.fn>).mockRejectedValue(error);
 
       const res = await REQUEST(
         buildApp(),
@@ -1940,7 +1940,7 @@ describe("Pause/Unpause endpoints", () => {
     });
 
     it("returns 500 on unexpected errors", async () => {
-      (store.addSteeringComment as ReturnType<typeof vi.fn>).mockRejectedValue(
+      (store.addComment as ReturnType<typeof vi.fn>).mockRejectedValue(
         new Error("Database error")
       );
 

packages/dashboard/src/routes.ts

@@ -2114,7 +2114,7 @@ export function createApiRoutes(store: TaskStore, options?: ServerOptions): Rout
         res.status(400).json({ error: "text must be between 1 and 2000 characters" });
         return;
       }
-      const task = await store.addSteeringComment(req.params.id, text, "user");
+      const task = await store.addComment(req.params.id, text, "user");
       res.json(task);
     } catch (err: any) {
       const status = err.code === "ENOENT" ? 404 : 500;