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-verdict-parsing/IMPLEMENTATION.md

@@ -1,24 +0,0 @@
-# Implementation: Fix Verdict Parsing and State Machine Alignment
-
-## Summary
-- Added `parse_verdict_status()` function to `task.py` that uses structured status-line parsing (`## Status:`, `- **Status**:`) before falling back to substring search
-- Fixed `determine_task_state()` to use structured verdict parsing, eliminating false-BLOCKED classification when PASS verdicts discuss failures
-- Aligned state machine with orchestrator spec: IMPLEMENTATION.md alone → BUG_FIND (not IMPLEMENT), ADVERSARIAL_BUG_REPORT alone → BUG_FIND (not ADV_BUG_FIND)
-- Added filesystem-sourced task name validation in `discover_tasks()` and `parse_sub_tasks()` — directories with characters outside `[A-Za-z0-9_-]` are skipped
-- Added comprehensive test classes: `TestVerdictParsing`, `TestStateMachineAlignment`, `TestTaskNameValidation`
-- Updated existing `test_implementation_state` to reflect new state machine behavior
-
-## Changes
-- `automaton/dashboard/core/task.py`: Added `parse_verdict_status()`, `_VALID_TASK_NAME_CHARS`, rewrote `determine_task_state()`, added name validation to `discover_tasks()` and `parse_sub_tasks()`
-- `tests/test_task.py`: Added 16 new tests, updated 1 existing test
-
-## Test Results
-90 passed in 0.06s (full suite)
-
-## Decisions
-- Kept substring fallback for unstructured verdicts for backward compatibility
-- ADVERSARIAL_BUG_REPORT alone now maps to BUG_FIND (not ADV_BUG_FIND) per orchestrator spec clarification
-- State machine checks are: DOC_REVIEW → both bug reports → BUG_REPORT alone → ADV alone → IMPLEMENTATION alone → TEST_PLAN → DESIGN → DECOMPOSITION → SPEC → BACKLOG
-
-## Blockers
-None