feat: Token-Nutzung nach Quelle (Monitor/Globe) aufgeschluesselt

- Backend liefert usage_by_source im current-Endpoint
- Monatliche Tabelle zeigt Quelle-Badge (Monitor/Globe)
- Source-Split unter den Kosten-KPIs sichtbar

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

src/routers/token_usage.py

@@ -76,6 +76,7 @@ async def get_org_usage(org_id: int, admin=Depends(get_current_admin)):
         
         return [{
             "year_month": row["year_month"],
+            "source": row["source"] if "source" in row.keys() else "monitor",
             "input_tokens": row["input_tokens"],
             "output_tokens": row["output_tokens"],
             "cache_creation_tokens": row["cache_creation_tokens"],
@@ -98,7 +99,26 @@ async def get_org_current_usage(org_id: int, admin=Depends(get_current_admin)):
         cursor = await db.execute(
             "SELECT * FROM token_usage_monthly WHERE organization_id = ? AND year_month = ?",
             (org_id, year_month))
-        usage = await cursor.fetchone()
+        usage_rows = await cursor.fetchall()
+        # Summe ueber alle Sources
+        usage = {
+            "input_tokens": sum(r["input_tokens"] for r in usage_rows),
+            "output_tokens": sum(r["output_tokens"] for r in usage_rows),
+            "total_cost_usd": sum(r["total_cost_usd"] for r in usage_rows),
+            "api_calls": sum(r["api_calls"] for r in usage_rows),
+            "refresh_count": sum(r["refresh_count"] for r in usage_rows),
+        }
+        # Per-Source Aufschluesselung
+        usage_by_source = {}
+        for r in usage_rows:
+            src = r["source"] if "source" in r.keys() else "monitor"
+            usage_by_source[src] = {
+                "input_tokens": r["input_tokens"],
+                "output_tokens": r["output_tokens"],
+                "total_cost_usd": round(r["total_cost_usd"], 2),
+                "api_calls": r["api_calls"],
+                "refresh_count": r["refresh_count"],
+            }
         
         cursor = await db.execute(
             "SELECT credits_total, credits_used, cost_per_credit, token_budget_usd, budget_warning_percent FROM licenses WHERE organization_id = ? AND status = 'active' ORDER BY id DESC LIMIT 1",
@@ -111,12 +131,13 @@ async def get_org_current_usage(org_id: int, admin=Depends(get_current_admin)):
         return {
             "year_month": year_month,
             "usage": {
-                "input_tokens": usage["input_tokens"] if usage else 0,
-                "output_tokens": usage["output_tokens"] if usage else 0,
-                "total_cost_usd": round(usage["total_cost_usd"], 2) if usage else 0,
-                "api_calls": usage["api_calls"] if usage else 0,
-                "refresh_count": usage["refresh_count"] if usage else 0,
+                "input_tokens": usage["input_tokens"],
+                "output_tokens": usage["output_tokens"],
+                "total_cost_usd": round(usage["total_cost_usd"], 2),
+                "api_calls": usage["api_calls"],
+                "refresh_count": usage["refresh_count"],
             },
+            "usage_by_source": usage_by_source,
             "budget": {
                 "credits_total": credits_total,
                 "credits_used": round(credits_used, 1) if credits_used else 0,