chore: optimize local git hooks and fix T11 any budget strictness

- Removed the expensive (40s+) `npm run test:unit` step from the `pre-commit` hook
- Created `.husky/pre-push` to run the unit test suite before pushing rather than per commit
- This prevents spurious async teardown errors from local test runners from blocking fast commits
- Replaced an explicit `any` cast with `Record<string, unknown> | undefined` in `chatCore.ts` to pass the `check:any-budget:t11` strict checker which enforces a budget of 0

.github/pull_request_template.md

@@ -0,0 +1,30 @@
+## Summary
+
+- Describe the user-facing or operational change.
+
+## Related Issues
+
+- Closes #
+- Related to #
+
+## Validation
+
+- [ ] `npm run lint`
+- [ ] `npm run test:unit`
+- [ ] `npm run test:coverage`
+- [ ] Coverage is still `>= 60%` for statements, lines, functions, and branches
+- [ ] SonarQube PR analysis is green or any remaining issues are explicitly documented below
+
+## Tests Added Or Updated
+
+- List every changed or added automated test file.
+- If no production code changed, state that here.
+
+## Coverage Notes
+
+- If this PR changes `src/`, `open-sse/`, `electron/`, or `bin/`, explain which tests cover the change.
+- If coverage moved down in any touched file, explain why and what follow-up task will recover it.
+
+## Reviewer Notes
+
+- Call out any risky areas, migrations, feature flags, or manual validation that reviewers should know about.