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).

tests/test_cleanup_done.py

@@ -134,6 +134,10 @@ class TestInstallCleanupScheduleIsolation:
     def test_plist_written_to_override_dir_not_host(self, tmp_path):
         agents = tmp_path / "agents"
         agents.mkdir()
+        host = Path.home() / "Library" / "LaunchAgents" / "com.automaton.cleanup.plist"
+        # Snapshot host plist state before the run. A pre-existing real install
+        # is OK — only a write during this test would be a bleed.
+        host_before = host.stat().st_mtime_ns if host.exists() else None
         res = self._run_cli(
             ["--install-cleanup-schedule", "--days", "5", "--interval", "120",
              "--project", str(tmp_path)],
@@ -142,9 +146,8 @@ class TestInstallCleanupScheduleIsolation:
         assert res.returncode == 0, res.stdout + res.stderr
         plist = agents / "com.automaton.cleanup.plist"
         assert plist.exists()
-        # Nothing bled to the real host LaunchAgents.
-        host = Path.home() / "Library" / "LaunchAgents" / "com.automaton.cleanup.plist"
-        assert not host.exists()
+        host_after = host.stat().st_mtime_ns if host.exists() else None
+        assert host_before == host_after, "host plist was modified by the test run"
         content = plist.read_text()
         assert "com.automaton.cleanup" in content
         assert "<integer>120</integer>" in content