API-Keys: Source-URL, einheitliches Status-Schema, passive Usage-Erfassung, Usage-Bars

- SourceUrl-Feld in api_keys: GitHub-URL bei adoptierten Scan-Keys gespeichert
- HandleAdopt: Name = user/repo (aus URL extrahiert), SourceUrl = vollständige URL
- Status-Schema vereinheitlicht: überall 'valid' statt 'ok'/'usage_limited'
- AnthropicKeyChecker.ExtractMetaFromHeaders(): passive Header-Auswertung
- AnthropicService: TryUpdateKeyMeta() nach jedem Chat-Request (fire-and-forget)
- DatabaseService: UpdateApiKeyMetaByToken() für passive Updates per Token
- Frontend: formatKeyStatus() zentrale Status-Labels für API-Keys + Scanned-Keys
- Frontend: createUsageBadge() zweizeiliger Balken (Sitzung/Woche) mit Farbstufen
- CSS: Usage-Badge mit Track/Fill, warn (>=70%) und danger (>=90%) Klassen

Services/DatabaseService.Integrations.cs

@@ -372,8 +372,8 @@ public partial class DatabaseService
     {
         using var conn = CreateConnection();
         await conn.ExecuteAsync(@"
-            INSERT INTO api_keys (key_id, provider, name, api_key, is_active, status, plan, usage_7d, usage_5h, checked_at, created_at, updated_at)
-            VALUES (@KeyId, @Provider, @Name, @ApiKey, @IsActive, @Status, @Plan, @Usage7d, @Usage5h, @CheckedAt, @CreatedAt, @UpdatedAt)",
+            INSERT INTO api_keys (key_id, provider, name, api_key, is_active, status, plan, usage_7d, usage_5h, checked_at, source_url, created_at, updated_at)
+            VALUES (@KeyId, @Provider, @Name, @ApiKey, @IsActive, @Status, @Plan, @Usage7d, @Usage5h, @CheckedAt, @SourceUrl, @CreatedAt, @UpdatedAt)",
             record);
         return await conn.ExecuteScalarAsync<long>("SELECT last_insert_rowid()");
     }
@@ -404,6 +404,15 @@ public partial class DatabaseService
             new { keyId, status, plan, usage7d, usage5h, now = DateTime.UtcNow.ToString("o") });
     }
 
+    public async Task UpdateApiKeyMetaByToken(string apiKey, string status, string plan, double? usage7d, double? usage5h)
+    {
+        using var conn = CreateConnection();
+        await conn.ExecuteAsync(@"
+            UPDATE api_keys SET status = @status, plan = @plan, usage_7d = @usage7d, usage_5h = @usage5h, checked_at = @now, updated_at = @now
+            WHERE api_key = @apiKey AND is_active = 1",
+            new { apiKey, status, plan, usage7d, usage5h, now = DateTime.UtcNow.ToString("o") });
+    }
+
     public async Task SetActiveApiKey(string keyId, string provider)
     {
         using var conn = CreateConnection();