Archive completed tasks, add cleanup commands, self-documenting dashboard UI

- Archive 79 completed framework-dev tasks from tasks/ -> tasks/complete/
- status.py: add --cleanup-done and --install-cleanup-schedule commands
- Add scripts/automaton-cleanup.sh for periodic task archiving
- Dashboard: rename 'Background' tab -> 'Agent', 'Cleanup' agent -> 'Completed Task Archiver', remove redundant group headers and pill badges, dim inactive agent placeholders
- .rules.md: add Self-Documenting UI Names rule
- New tests: test_cleanup_done.py, expanded test_app.py and test_task.py

tasks/fix-dashboard-cors-origin/.state

@@ -1 +0,0 @@
-complete

tasks/fix-dashboard-cors-origin/.state.approvals

@@ -1,2 +0,0 @@
-research:approved|2026-06-22T14:28:48.476535+00:00|user
-code_review:approved|2026-06-22T14:36:53.472581+00:00|user

tasks/fix-dashboard-cors-origin/ADVERSARIAL_BUG_REPORT.md

@@ -1,12 +0,0 @@
-# Adversarial Bug Report: fix-dashboard-cors-origin
-
-## Attack Vectors Tested
-1. **Preflight OPTIONS request**: `do_OPTIONS()` returns 204 without CORS headers — browser will block cross-origin requests correctly
-2. **Missing security headers on error responses**: `_send_error()` uses `SECURITY_HEADERS` — verified
-3. **X-Frame-Options bypass**: `DENY` is the most restrictive value — no bypass
-4. **MIME type confusion**: `X-Content-Type-Options: nosniff` prevents browsers from sniffing content type
-
-## Findings
-No bugs found. The security headers are correctly applied to all response types.
-
-## Verdict: PASS

tasks/fix-dashboard-cors-origin/BUG_REPORT.md

@@ -1,9 +0,0 @@
-# Bug Report: fix-dashboard-cors-origin
-
-## Scope
-Reviewed `automaton/dashboard/ui/app.py` for security issues after CORS removal.
-
-## Findings
-No bugs found. Wildcard CORS headers removed. Security headers (`X-Content-Type-Options`, `X-Frame-Options`) correctly applied to all responses. `do_OPTIONS()` returns 204 without CORS headers.
-
-## Verdict: PASS

tasks/fix-dashboard-cors-origin/CODE_REVIEW.md

@@ -1,19 +0,0 @@
-# Code Review: fix-dashboard-cors-origin
-
-## Reviewed Files
-- `automaton/dashboard/ui/app.py` (`SECURITY_HEADERS`, `_send_json()`, `_send_error()`, `do_OPTIONS()`)
-- `tests/test_app.py`
-
-## Changes
-Removed wildcard CORS headers (`Access-Control-Allow-Origin: *`), replaced with security headers (`X-Content-Type-Options: nosniff`, `X-Frame-Options: DENY`).
-
-## Analysis
-- **Security**: Removing wildcard CORS eliminates the risk of cross-origin attacks from malicious local web pages
-- **Single-origin app**: The dashboard is a local web app served from a single origin — CORS is unnecessary
-- **Security headers**: `X-Content-Type-Options: nosniff` prevents MIME type sniffing, `X-Frame-Options: DENY` prevents clickjacking
-- **OPTIONS handler**: `do_OPTIONS()` still returns 204 No Content (for preflight requests) but without CORS headers
-- **Tests**: Test assertions correctly verify absence of CORS headers and presence of security headers
-
-## Verdict: PASS
-
-The fix eliminates a security vulnerability while adding useful hardening headers. Tests are properly updated.

tasks/fix-dashboard-cors-origin/DOC_REVIEW.md

@@ -1,13 +0,0 @@
-# Doc Review: fix-dashboard-cors-origin
-
-## Documentation Impact
-No external documentation changes needed. The CHANGELOG.md previously recorded "Added CORS headers" — the CHANGELOG should note their removal for this fix.
-
-## Checklist
-- [x] No new commands or flags introduced
-- [x] AGENTS.md unchanged — no CORS references in framework docs
-- [x] README.md unchanged — no CORS references
-- [x] CHANGELOG.md will be updated to note CORS removal and security headers added
-- [x] `harden-dashboard-security` task history preserved (not modified — it's a historical record)
-
-## Verdict: PASS

tasks/fix-dashboard-cors-origin/IMPLEMENTATION.md

@@ -1,18 +0,0 @@
-# Implementation: fix-dashboard-cors-origin
-
-## Bug
-Dashboard's `app.py` set `Access-Control-Allow-Origin: *` (wildcard CORS) on all responses via `CORS_HEADERS`. Since the dashboard is a local single-origin app, this wildcard CORS header is unnecessary and poses a security risk — any malicious webpage on the machine could make requests to the dashboard API.
-
-## Fix
-1. Removed `CORS_HEADERS` dictionary (which contained `Access-Control-Allow-Origin: *` and `Access-Control-Allow-Methods`)
-2. Added `SECURITY_HEADERS` with `X-Content-Type-Options: nosniff` and `X-Frame-Options: DENY`
-3. Updated `_send_json()`, `_send_error()`, and `do_OPTIONS()` to use `SECURITY_HEADERS` instead of `CORS_HEADERS`
-4. `do_OPTIONS()` no longer returns `Access-Control-Allow-*` headers — it simply returns 204 No Content
-
-## Files Changed
-- `automaton/dashboard/ui/app.py`: Replaced `CORS_HEADERS` with `SECURITY_HEADERS`, updated all response methods
-- `tests/test_app.py`: Updated CORS-related tests to assert NO `Access-Control-Allow-Origin` header is present, and that security headers are sent
-
-## Tests
-- `test_app.py` tests updated to verify security headers (`X-Content-Type-Options`, `X-Frame-Options`) and absence of CORS headers
-- All 249 tests pass

tasks/fix-dashboard-cors-origin/SPEC.md

@@ -1,17 +0,0 @@
-# Spec: fix-dashboard-cors-origin
-
-## Problem
-`automaton/dashboard/ui/app.py:40-44` sets `Access-Control-Allow-Origin: *` on all responses, including POST and PUT endpoints. Any website open in the user's browser can send cross-origin requests to `localhost:8080`, allowing silent modification of task reviews and config.
-
-## Fix
-Remove the wildcard CORS origin. The dashboard is a local single-origin app — CORS headers are unnecessary. Either:
-1. Remove `CORS_HEADERS` entirely and stop sending them, OR
-2. Set `Access-Control-Allow-Origin` to `http://localhost:{port}` only
-
-Option 1 is simpler and safer. The dashboard serves both the HTML and the API from the same origin, so CORS is not needed.
-
-## Acceptance Criteria
-- No `Access-Control-Allow-Origin: *` header in responses
-- Cross-origin requests from other websites are blocked by the browser
-- Same-origin dashboard HTML can still fetch the API (no CORS needed)
-- Existing CORS tests in `test_app.py` updated to reflect the change

tasks/fix-dashboard-cors-origin/VERDICT.md

@@ -1,13 +0,0 @@
-# Verdict: fix-dashboard-cors-origin
-
-## Status: PASS
-
-## Summary
-Removed wildcard CORS headers (`Access-Control-Allow-Origin: *`) from dashboard API responses. Replaced with security headers (`X-Content-Type-Options: nosniff`, `X-Frame-Options: DENY`). Tests updated to verify absence of CORS headers and presence of security headers.
-
-## Artifacts
-- IMPLEMENTATION.md: Complete
-- CODE_REVIEW.md: PASS
-- BUG_REPORT.md: No bugs found
-- ADVERSARIAL_BUG_REPORT.md: No bugs found
-- DOC_REVIEW.md: PASS