feat(cli): forward feedback submissions to the backend feedback endpoint (#2003)

* feat(cli): forward feedback submissions to backend endpoint

* fix(cli): truncate feedback fields to backend caps + ack before forwarding

Addresses PR review (via):
- Truncate comment (2000) / cli_version (100) / env (500) to the backend DTO
  caps before POSTing, so a pasted stack trace is forwarded truncated instead
  of rejected with a 422 the best-effort path swallows silently.
- Print "Thanks for the feedback!" before the best-effort forward so the ack
  isn't blocked behind the (bounded) network call.

* fix(cli): type feedback fetch mock

packages/cli/src/commands/feedback.ts

@@ -7,6 +7,7 @@ import { trackRenderFeedback } from "../telemetry/events.js";
 import { shouldTrack, flush } from "../telemetry/client.js";
 import { getDoctorSummary } from "../telemetry/feedback.js";
 import { publishProjectArchive } from "../utils/publishProject.js";
+import { submitFeedback } from "../utils/submitFeedback.js";
 import { buildIssueUrl, HYPERFRAMES_REPO_URL } from "../utils/feedbackIssue.js";
 import { VERSION } from "../version.js";
 import { c } from "../ui/colors.js";
@@ -164,7 +165,10 @@ export default defineCommand({
     trackRenderFeedback({ rating, comment, doctorSummary });
 
     await flush();
+    // Ack first so the user isn't kept waiting on the best-effort forward (which
+    // is bounded to a few seconds and never surfaces an error either way).
     console.log(c.dim("Thanks for the feedback!"));
+    await submitFeedback({ rating, comment, cliVersion: VERSION, env: doctorSummary });
 
     if (args["file-issue"] === true) {
       await fileGithubIssue({