Restore archived tasks, fix dashboard scroll-reset, bind ornith, add Playwright smoke test

- **Restore 82 completed tasks** from tasks/complete/ back to tasks/ top
  level (all <7 days old per the cleanup policy; premature bulk archive
  was fixed).
- **Dashboard: fix scroll-reset on auto-refresh** — renderBoard rebuilds
  the board via innerHTML every 2s, destroying each column-body's
  scrollTop. Now snapshots column-body scrollTop + board.scrollLeft +
  view.scrollTop before rebuild and restores after (matched by
  PHASE_GROUPS index).
- **Dashboard UI additions** (pre-existing unstaged work): approval
  section cards, transition buttons, inline artifact editor (textarea for
  writing missing SPEC/VERDICT/etc from the detail modal).
- **Bind ornith as Implement model** — config.md: Model explicit to
  omlx/Ornith-1.0-35B-4bit-mlx, context window 32768. Interactive
  autopilot already used ornith via opencode default; now explicit.
- **Fix cleanup stub** — automaton-cleanup.sh had a stale --project arg
  pointing at a pytest temp dir (test isolation leak). Rewired to point
  at ~/.automaton.
- **Fix plist-isolation test** — test asserted host plist doesn't exist,
  but a real install creates it. Now snapshots mtime before run, asserts
  unchanged after (only a write during the test counts as bleed).
- **New Playwright smoke test** (tests/test_dashboard_ui.py) — 2 tests:
  board renders tasks, column scroll survives auto-refresh tick.
  Verified the test fails without the scroll fix (scrollTop resets to 0).
  Skipped via importorskip when playwright is absent (main CI stays
  green).
- **Clarify SI loop scope in README** — new-project onboarding section
  documents the framework-scoped self-improvement loop and options
  (leave/pause/create project loop).
- **CHANGELOG** documents all changes including the known model-divergence
  gap (mde tasks marked complete but per-role model binding was never
  implemented).

tasks/pre-existing-fixes/IMPLEMENTATION.md

@@ -0,0 +1,28 @@
+# Implementation: Pre-existing Fixes
+
+## Changes Made
+
+### 1. `_infer_state_from_artifacts` heuristic fix (`scripts/status.py` lines 304-309)
+**Before**: `SPEC.md exists AND BUG_REPORT.md doesn't exist → bug_find` (wrong — most tasks only have SPEC.md)
+**After**: Simplified logic:
+- `BUG_REPORT.md` alone → `adversarial_bug_find` (bug_find done)
+- `IMPLEMENTATION.md` alone → `bug_find` (implement done)
+- `SPEC.md` alone → `research` (correct mapping)
+- Removed the buggy SPEC+no-BUG_REPORT case entirely
+
+### 2. `cmd_validate_folder` corrupted state fix (`scripts/status.py` lines 563-568)
+**Before**: If `.state` exists but `_read_state()` returns None, silently falls back to `_infer_state_from_artifacts`
+**After**: Error out with clear message: "corrupted .state file — re-bootstrap with --upgrade"
+
+### 3. `upgrade.sh` fixes (`scripts/upgrade.sh`)
+- **Removed `|| true`**: `python3 status.py --upgrade` now fails loudly with error message
+- **Added python3 check**: Script exits early with clear error if python3 not in PATH
+- **Git hooks directory**: Use `git rev-parse --git-dir` instead of assuming `.git/hooks/` (supports worktrees and bare repos)
+- **mkdir -p hooks**: Ensure hooks directory exists before symlinking
+
+### 4. Tests added (`tests/test_status.py`)
+- `TestInferStateFromArtifacts`: 4 tests verifying heuristic correctness (spec→research, impl→bug_find, bug_report→adversarial_bug_find, spec+decomp→decomposition)
+- `TestValidateFolderCorruptedState`: 2 tests verifying empty/whitespace .state files produce errors
+
+## Test Results
+All 206 tests pass (6 new tests, 200 existing).