feat(legal): B-2.9 6 pages légales (CGU, Loi 25, cookies, remboursement, accessibilité, mentions)

- src/legal/__init__.py: define canonical LEGAL_VERSION='2026-04-27' constant
  (single source of truth — auth.py now imports it as SIGNUP_LEGAL_VERSION).
- src/legal/routes.py: add /legal/<page> + /legal/ index routes; markdown rendered
  from src/legal/content/*.md with toc, tables, fenced_code, attr_list extensions.
- src/legal/content/: 6 French (Québec) markdown documents — DictIA Inc. /
  InnovA AI S.E.N.C. branding, Loi 25-compliant 12-section privacy policy,
  WCAG 2.2 AA accessibility statement, AGPL-3.0 attribution. All marked
  DRAFT v1.0 pending legal review by Allison Rioux.
- templates/legal/_layout.html + index.html: extends marketing/base.html;
  inline .legal-content typographic styles (no CSS rebuild required).
- .gitignore: allow-rule for src/legal/content/*.md so markdown is tracked
  despite the global *.md ignore.
- tests/test_legal_pages.py: 9 tests covering 200 responses, DictIA branding,
  rprp@dictia.ca presence, 12 mandatory Loi 25 sections, public indexability
  (no X-Robots-Tag noindex), shared layout, marketing/base.html extension,
  DRAFT callout, and LEGAL_VERSION/SIGNUP_LEGAL_VERSION equivalence.
- tests/_run_legal_pages_windows.py: manual driver (Windows fcntl stub).
- static/css/marketing.css: regenerated by `npm run build:css` to include
  new utility classes referenced from templates/legal/*.html.

Tests: 9/9 pass. No off-limits files modified beyond the 2-line auth.py
constant move spec'd in B-2.9. No schema changes; markdown==3.5.1 already
pinned in requirements.txt (B-1.1). Pages publicly indexable by design
(Loi 25 transparency).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/_run_legal_pages_windows.py

@@ -0,0 +1,74 @@
+"""Windows manual driver for tests/test_legal_pages.py.
+
+src/init_db.py imports `fcntl`, which is POSIX-only. On Windows we stub it
+before src.app gets imported, then run each test_* function and report.
+
+Run from the repo root:
+    py -3 tests/_run_legal_pages_windows.py
+"""
+import os
+import sys
+import types
+import traceback
+
+# 1) Stub fcntl BEFORE any import of src.* happens.
+if 'fcntl' not in sys.modules:
+    fcntl_stub = types.ModuleType('fcntl')
+    fcntl_stub.LOCK_EX = 2
+    fcntl_stub.LOCK_NB = 4
+    fcntl_stub.LOCK_UN = 8
+    fcntl_stub.LOCK_SH = 1
+    fcntl_stub.flock = lambda *_args, **_kw: None
+    fcntl_stub.fcntl = lambda *_args, **_kw: 0
+    sys.modules['fcntl'] = fcntl_stub
+
+# 2) Make repo root importable
+HERE = os.path.dirname(os.path.abspath(__file__))
+REPO = os.path.dirname(HERE)
+sys.path.insert(0, REPO)
+
+# 3) Test-friendly env defaults
+os.environ.setdefault('SQLALCHEMY_DATABASE_URI', 'sqlite:///:memory:')
+os.environ.setdefault('SECRET_KEY', 'test-secret-key-legal')
+os.environ.setdefault('ENABLE_EMAIL_VERIFICATION', 'false')
+os.environ.setdefault('REQUIRE_EMAIL_VERIFICATION', 'false')
+os.environ.setdefault('TRANSCRIPTION_BASE_URL', 'http://test-stub')
+os.environ.setdefault('TRANSCRIPTION_API_KEY', 'test-stub')
+os.environ.setdefault('RATELIMIT_ENABLED', 'false')
+try:
+    sys.stdout.reconfigure(encoding='utf-8', errors='replace')
+    sys.stderr.reconfigure(encoding='utf-8', errors='replace')
+except Exception:
+    pass
+
+# 4) Import the test module and run every test_* function
+import importlib.util  # noqa: E402
+spec = importlib.util.spec_from_file_location(
+    'test_legal_pages',
+    os.path.join(HERE, 'test_legal_pages.py'),
+)
+mod = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(mod)
+
+tests = [(name, fn) for name, fn in vars(mod).items()
+         if name.startswith('test_') and callable(fn)]
+
+passed = 0
+failed = []
+for name, fn in tests:
+    try:
+        fn()
+        print(f'  PASS  {name}')
+        passed += 1
+    except Exception as e:  # noqa: BLE001
+        print(f'  FAIL  {name}: {type(e).__name__}: {e}')
+        failed.append((name, traceback.format_exc()))
+
+total = len(tests)
+print()
+print(f'Result: {passed}/{total} passed, {len(failed)} failed')
+if failed:
+    print('\n--- Failures ---\n')
+    for name, tb in failed:
+        print(f'### {name}\n{tb}\n')
+sys.exit(0 if not failed else 1)