feat(sources): X-Account-Verwaltung im Verwaltungsportal

Neuer Sub-Tab "X-Accounts" unter Quellen: die als Recherchequelle
eingebundenen X-Accounts anzeigen, hinzufuegen, bearbeiten und entfernen.
Schreibt source_type=x_account in die geteilte sources-Tabelle, von wo
der Monitor sie pro Lage nutzt.

- x_account im source_type-Pattern von GlobalSourceCreate/Update
- primary_language in Create/Update plus INSERT (Keyword-Matching)
- x_account-Typ und x-Kategorie in source_meta.py
- Sub-Tab, Tabelle und Modal in dashboard.html, Logik in sources.js

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

src/routers/sources.py

@@ -42,7 +42,7 @@ router = APIRouter(prefix="/api/sources", tags=["sources"])
 
 SOURCE_UPDATE_COLUMNS = {
     "name", "url", "domain", "source_type", "category", "status", "notes",
-    "language", "bias", "fetch_strategy",
+    "language", "primary_language", "bias", "fetch_strategy",
     "political_orientation", "media_type", "reliability",
     "state_affiliated", "country_code",
 }
@@ -118,11 +118,12 @@ class GlobalSourceCreate(BaseModel):
     name: str = Field(min_length=1, max_length=200)
     url: Optional[str] = None
     domain: Optional[str] = None
-    source_type: str = Field(default="rss_feed", pattern="^(rss_feed|web_source|excluded|telegram_channel|podcast_feed|pdf_document)$")
+    source_type: str = Field(default="rss_feed", pattern="^(rss_feed|web_source|excluded|telegram_channel|podcast_feed|pdf_document|x_account)$")
     category: str = Field(default="sonstige")
     status: str = Field(default="active", pattern="^(active|inactive)$")
     notes: Optional[str] = None
     language: Optional[str] = Field(default=None, max_length=100)
+    primary_language: Optional[str] = Field(default=None, max_length=16)
     bias: Optional[str] = Field(default=None, max_length=500)
     fetch_strategy: Optional[str] = Field(default="default", pattern="^(default|googlebot|paywall|skip)$")
 
@@ -131,11 +132,12 @@ class GlobalSourceUpdate(BaseModel):
     name: Optional[str] = Field(default=None, max_length=200)
     url: Optional[str] = None
     domain: Optional[str] = None
-    source_type: Optional[str] = Field(default=None, pattern="^(rss_feed|web_source|excluded|telegram_channel|podcast_feed|pdf_document)$")
+    source_type: Optional[str] = Field(default=None, pattern="^(rss_feed|web_source|excluded|telegram_channel|podcast_feed|pdf_document|x_account)$")
     category: Optional[str] = None
     status: Optional[str] = Field(default=None, pattern="^(active|inactive)$")
     notes: Optional[str] = None
     language: Optional[str] = Field(default=None, max_length=100)
+    primary_language: Optional[str] = Field(default=None, max_length=16)
     bias: Optional[str] = Field(default=None, max_length=500)
     political_orientation: Optional[str] = None
     media_type: Optional[str] = None
@@ -230,10 +232,10 @@ async def create_global_source(
             )
 
     cursor = await db.execute(
-        """INSERT INTO sources (name, url, domain, source_type, category, status, notes, language, bias, fetch_strategy, added_by, tenant_id)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'system', NULL)""",
+        """INSERT INTO sources (name, url, domain, source_type, category, status, notes, language, primary_language, bias, fetch_strategy, added_by, tenant_id)
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'system', NULL)""",
         (data.name, data.url, data.domain, data.source_type, data.category, data.status, data.notes,
-         data.language, data.bias, data.fetch_strategy or "default"),
+         data.language, data.primary_language, data.bias, data.fetch_strategy or "default"),
     )
     src_id = cursor.lastrowid
     await db.commit()