feat: 8 cookie banner legal checks (Playwright)

1. Impressum link accessible from banner (§5 TMG, LG Rostock)
2. DSE link in banner (Art. 13 DSGVO, informierte Einwilligung)
3. Wrong wording: "Zustimmung zur DSE" — DSE is Art. 13 obligation,
   not consent. Correct: "zur Kenntnis genommen"
4. Reject button visible (§25 TDDDG, no hidden reject)
5. Pre-ticked checkboxes detected (EuGH C-673/17 Planet49)
6. Dark Pattern: button size comparison — accept vs reject area
   ratio >2.5x or font size ratio >1.5x = dark pattern
7. Cookie Wall detection (Phase B — site blocked after reject)
8. Re-access to settings (Art. 7(3) — revocation as easy as consent)

All checks run via Playwright on the actual rendered banner.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

consent-tester/main.py

@@ -42,6 +42,7 @@ class ScanResponse(BaseModel):
     summary: dict
     scanned_at: str
     category_tests: list = []
+    banner_checks: dict = {}
 
 
 @app.get("/health")
@@ -81,11 +82,17 @@ async def scan_consent(req: ScanRequest):
         },
         summary={
             "critical": sum(1 for v in result.reject_violations if v.severity == "CRITICAL"),
-            "high": len(result.before_violations),
+            "high": len(result.before_violations) + sum(1 for v in result.banner_text_violations if v.severity == "HIGH"),
             "undocumented": len(result.accept_undocumented),
-            "total_violations": len(result.before_violations) + len(result.reject_violations),
+            "total_violations": len(result.before_violations) + len(result.reject_violations) + len(result.banner_text_violations),
             "category_violations": sum(len(ct.violations) for ct in result.category_tests),
             "categories_tested": len(result.category_tests),
+            "banner_text_issues": len(result.banner_text_violations),
+        },
+        banner_checks={
+            "has_impressum_link": result.banner_has_impressum_link,
+            "has_dse_link": result.banner_has_dse_link,
+            "violations": [v.__dict__ for v in result.banner_text_violations],
         },
         scanned_at=datetime.now(timezone.utc).isoformat(),
         category_tests=[{