chore: cleanup pass — 3 latent bug fixes + 913 LOC net delete

Bug fixes
- CompositeEngine no longer misroutes bare Chinese-futures codes like
  RB2410 to GlobalFuturesEngine. _is_china_futures moved into a shared
  _market_hooks module with a case-normalized product table and a
  non-CN exchange guard. 9 new regression cases (RB2410 / rb2410 /
  RB2410.SHFE / CL.NYMEX / M2412.CBOT / CF2412.ICE / AU2412.COMEX /
  FG2412.EUREX / bare CN-collision still routes Chinese).
- Session FTS5 indexes now persist timestamps so cross-session search
  can sort by date. Same path also fixes a re-upsert that was
  wall-clocking every session's started_at on title-rename.
- Vite dev-mode proxy gained the missing /alpha entry; AlphaZoo page
  resolves on npm run dev.

Cleanup
- Deleted swarm/api_models.py + swarm/mailbox.py + SwarmDashboard.tsx
  (dead modules / orphaned UI after swarm-via-agent flow).
- Deleted SessionService.resume_attempt + get_attempts + get_attempt
  + SessionStore.list_attempts + Attempt.mark_waiting_user chain
  (half-baked human-in-the-loop from initial commit).
- Deleted ChatLLM.achat (async sibling never called) and
  _extract_balanced_json (only-tested helper).
- Deleted american_exercise_value in options_portfolio.py
  (driver inlines bs_price logic).
- Deleted _compute_ic_series_reference in factor_analysis_core.py
  (kept-as-reference, no callers).
- Collapsed MEMORY_TYPES duplication between cli.py and
  memory.persistent; restored set-equality invariant assert.
- Deleted runSwarm (~197 LOC), swarmDash state, swarmCancelRef
  write-only ref (orphaned by new agent-driven swarm flow).
- Dropped 76 unused 'vw = vwap(...)' boilerplate lines across
  gtja191 alphas + their now-unused vwap imports.
- Cleared 11 F401 unused-import sites in tools/, agent/, providers/.

Test infrastructure
- test_e2e_harness_v2.py (real-LLM e2e) gated behind
  VIBE_TRADING_RUN_LIVE_E2E so CI no longer flips shape based on
  env-key presence. CI workflow now has explicit --ignore.
- test_auto_compact_with_long_history: monkeypatch TOKEN_THRESHOLD so
  the test deterministically triggers compact instead of relying on
  unrelated LLM behaviour.
- test_compact_tool_explicit: assertion corrected — compact tool is
  special-cased in loop._process_tool_calls and does NOT emit
  tool_call events. Assert on the 'compact' event instead.
- TestSwarmE2E: per-test @pytest.mark.timeout overrides matching the
  internal 300s poll deadlines; cancel test now polls for terminal
  state instead of fixed sleep(3).

Tooling
- ruff per-file-ignores for factors/zoo/** (3783 → 0 F401 noise);
  F841 stays active in zoo to catch real formula bugs.
- frontend tsconfig: noUnusedLocals + noUnusedParameters as
  regression guards.
- highlight.js hoisted to direct dependency (was transitive via
  rehype-highlight).
- Vite proxy: dropped unused /run, /skills, /health, /api, /system;
  added /alpha.

Annotations
- direction parameter renamed to _direction in 6 calc_commission
  signatures (reserved for future borrow-fee asymmetry).
- _MARGIN_PER_CONTRACT in global_futures.py annotated as reference
  data.
- Backtest engines' _calc_pct_change variants cross-reference each
  other in docstrings.

Docs
- 2026-05-18 news entry added to README.md / README_zh.md /
  README_ja.md / README_ko.md / README_ar.md; 2026-05-15 entry
  rolled into the Earlier news <details>.
- Contributors heading: v0.1.7 cycle → v0.1.8 cycle in all 5
  READMEs.

126 files changed, +363 / -1276.

.github/workflows/test.yml

@@ -33,7 +33,10 @@ jobs:
           python -m py_compile backtest/runner.py
 
       - name: Run tests
-        run: pytest --ignore=agent/tests/e2e_backtest --tb=short -q
+        # test_e2e_harness_v2.py is gated by VIBE_TRADING_RUN_LIVE_E2E
+        # (real-LLM only); list --ignore here so CI's intent is explicit and
+        # the suite never silently switches state on env presence.
+        run: pytest --ignore=agent/tests/e2e_backtest --ignore=agent/tests/test_e2e_harness_v2.py --tb=short -q
 
       - uses: actions/setup-node@v4
         with: