Token-Budget Hard-Stop + Banner bei aufgebrauchtem Budget

- check_license() liefert jetzt unlimited_budget, credits_total, credits_used,
  read_only_reason. Bei nicht-unlimited UND credits_used >= credits_total wird
  status=budget_exceeded, read_only=True gesetzt.
- require_writable_license blockiert mit 403 + X-License-Status-Header je nach Reason.
- /api/auth/me liefert read_only_reason und unlimited_budget; credits_percent_used
  wird nicht mehr auf 100 gekappt (echte Prozente).
- Frontend: Banner-Text dynamisch je nach reason (budget_exceeded/expired/...).
  Refresh-Button bei read_only deaktiviert + Tooltip. Globaler 403-Handler in
  api.js: bei X-License-Status -> Banner + Toast aktualisieren.

src/middleware/license_check.py

@@ -40,12 +40,25 @@ async def require_writable_license(
 ) -> dict:
     """Dependency die sicherstellt, dass die Lizenz Schreibzugriff erlaubt.
 
-    Blockiert neue Lagen/Refreshes bei abgelaufener Lizenz (Nur-Lesen-Modus).
+    Blockiert neue Lagen/Refreshes bei abgelaufener Lizenz, deaktivierter Org
+    oder aufgebrauchtem Token-Budget (Hard-Stop).
     """
     lic = current_user.get("license", {})
     if lic.get("read_only"):
+        reason = lic.get("read_only_reason") or "expired"
+        if reason == "budget_exceeded":
+            detail = "Token-Budget aufgebraucht. Bitte Verwaltung kontaktieren."
+        elif reason == "expired":
+            detail = "Lizenz abgelaufen. Nur Lesezugriff moeglich."
+        elif reason == "no_license":
+            detail = "Keine aktive Lizenz. Bitte Verwaltung kontaktieren."
+        elif reason == "org_disabled":
+            detail = "Organisation deaktiviert. Bitte Support kontaktieren."
+        else:
+            detail = lic.get("message") or "Nur Lesezugriff moeglich."
         raise HTTPException(
             status_code=status.HTTP_403_FORBIDDEN,
-            detail="Lizenz abgelaufen oder widerrufen. Nur Lesezugriff moeglich.",
+            detail=detail,
+            headers={"X-License-Status": reason},
         )
     return current_user

src/models.py

@@ -37,6 +37,8 @@ class UserMeResponse(BaseModel):
     license_status: str = "unknown"
     license_type: str = ""
     read_only: bool = False
+    read_only_reason: Optional[str] = None
+    unlimited_budget: bool = False
     credits_total: Optional[int] = None
     credits_remaining: Optional[int] = None
     credits_percent_used: Optional[float] = None

src/routers/auth.py

@@ -187,10 +187,11 @@ async def get_me(
         from services.license_service import check_license
         license_info = await check_license(db, current_user["tenant_id"])
 
-    # Credits-Daten laden
+    # Credits-Daten laden (echte Prozente, nicht gekappt)
     credits_total = None
     credits_remaining = None
     credits_percent_used = None
+    unlimited_budget = bool(license_info.get("unlimited_budget", False))
     if current_user.get("tenant_id"):
         lic_cursor = await db.execute(
             "SELECT credits_total, credits_used, cost_per_credit FROM licenses WHERE organization_id = ? AND status = 'active' ORDER BY id DESC LIMIT 1",
@@ -200,7 +201,7 @@ async def get_me(
             credits_total = lic_row["credits_total"]
             credits_used = lic_row["credits_used"] or 0
             credits_remaining = max(0, int(credits_total - credits_used))
-            credits_percent_used = round(min(100, (credits_used / credits_total) * 100), 1) if credits_total > 0 else 0
+            credits_percent_used = round((credits_used / credits_total) * 100, 1) if credits_total > 0 else 0
 
     return UserMeResponse(
         id=current_user["id"],
@@ -216,6 +217,8 @@ async def get_me(
         license_status=license_info.get("status", "unknown"),
         license_type=license_info.get("license_type", ""),
         read_only=license_info.get("read_only", False),
+        read_only_reason=license_info.get("read_only_reason"),
+        unlimited_budget=unlimited_budget,
         is_global_admin=current_user.get("is_global_admin", False),
     )
 

src/services/license_service.py

@@ -11,7 +11,8 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
     """Prueft den Lizenzstatus einer Organisation.
 
     Returns:
-        dict mit: valid, status, license_type, max_users, current_users, read_only, message
+        dict mit: valid, status, license_type, max_users, current_users, read_only,
+        read_only_reason, message, unlimited_budget, credits_total, credits_used
     """
     # Organisation pruefen
     cursor = await db.execute(
@@ -20,10 +21,14 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
     )
     org = await cursor.fetchone()
     if not org:
-        return {"valid": False, "status": "not_found", "read_only": True, "message": "Organisation nicht gefunden"}
+        return {"valid": False, "status": "not_found", "read_only": True,
+                "read_only_reason": "not_found",
+                "message": "Organisation nicht gefunden"}
 
     if not org["is_active"]:
-        return {"valid": False, "status": "org_disabled", "read_only": True, "message": "Organisation deaktiviert"}
+        return {"valid": False, "status": "org_disabled", "read_only": True,
+                "read_only_reason": "org_disabled",
+                "message": "Organisation deaktiviert"}
 
     # Aktive Lizenz suchen
     cursor = await db.execute(
@@ -35,7 +40,15 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
     license_row = await cursor.fetchone()
 
     if not license_row:
-        return {"valid": False, "status": "no_license", "read_only": True, "message": "Keine aktive Lizenz"}
+        return {"valid": False, "status": "no_license", "read_only": True,
+                "read_only_reason": "no_license",
+                "message": "Keine aktive Lizenz"}
+
+    # Felder zur weiteren Verwendung extrahieren
+    lic_dict = dict(license_row)
+    unlimited_budget = bool(lic_dict.get("unlimited_budget"))
+    credits_total = lic_dict.get("credits_total")
+    credits_used = lic_dict.get("credits_used") or 0
 
     # Ablauf pruefen
     now = datetime.now(TIMEZONE)
@@ -52,11 +65,21 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
                     "status": "expired",
                     "license_type": license_row["license_type"],
                     "read_only": True,
+                    "read_only_reason": "expired",
                     "message": "Lizenz abgelaufen",
+                    "unlimited_budget": unlimited_budget,
+                    "credits_total": credits_total,
+                    "credits_used": credits_used,
                 }
         except (ValueError, TypeError):
             pass
 
+    # Budget-Check (Hard-Stop bei aufgebrauchten Credits, ausser unlimited)
+    budget_exceeded = False
+    if not unlimited_budget and credits_total and credits_total > 0:
+        if credits_used >= credits_total:
+            budget_exceeded = True
+
     # Nutzerzahl pruefen
     cursor = await db.execute(
         "SELECT COUNT(*) as cnt FROM users WHERE organization_id = ? AND is_active = 1",
@@ -64,6 +87,21 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
     )
     current_users = (await cursor.fetchone())["cnt"]
 
+    if budget_exceeded:
+        return {
+            "valid": True,  # Lizenz ist gueltig, aber Budget aufgebraucht -> read-only
+            "status": "budget_exceeded",
+            "license_type": license_row["license_type"],
+            "max_users": license_row["max_users"],
+            "current_users": current_users,
+            "read_only": True,
+            "read_only_reason": "budget_exceeded",
+            "message": "Token-Budget aufgebraucht",
+            "unlimited_budget": False,
+            "credits_total": credits_total,
+            "credits_used": credits_used,
+        }
+
     return {
         "valid": True,
         "status": license_row["status"],
@@ -71,7 +109,11 @@ async def check_license(db: aiosqlite.Connection, organization_id: int) -> dict:
         "max_users": license_row["max_users"],
         "current_users": current_users,
         "read_only": False,
+        "read_only_reason": None,
         "message": "Lizenz aktiv",
+        "unlimited_budget": unlimited_budget,
+        "credits_total": credits_total,
+        "credits_used": credits_used,
     }
 
 

src/static/js/api.js

@@ -67,6 +67,29 @@ const API = {
             } else if (typeof detail === 'object' && detail !== null) {
                 detail = JSON.stringify(detail);
             }
+
+            // Lizenz-Status aus Header auslesen (vom Backend gesetzt bei 403)
+            const licStatus = response.headers.get('X-License-Status');
+            if (response.status === 403 && licStatus && typeof App !== 'undefined') {
+                if (!App.user) App.user = {};
+                App.user.read_only = true;
+                App.user.read_only_reason = licStatus;
+                const warningEl = document.getElementById('header-license-warning');
+                if (warningEl) {
+                    let text = 'Nur Lesezugriff';
+                    if (licStatus === 'budget_exceeded') text = 'Token-Budget aufgebraucht – nur Lesezugriff. Bitte Verwaltung kontaktieren.';
+                    else if (licStatus === 'expired') text = 'Lizenz abgelaufen – nur Lesezugriff';
+                    else if (licStatus === 'no_license') text = 'Keine aktive Lizenz – nur Lesezugriff';
+                    else if (licStatus === 'org_disabled') text = 'Organisation deaktiviert – nur Lesezugriff';
+                    warningEl.textContent = text;
+                    warningEl.classList.add('visible');
+                }
+                if (typeof App._updateRefreshButton === 'function') App._updateRefreshButton(false);
+                if (typeof UI !== 'undefined' && UI.showToast) {
+                    UI.showToast(detail || 'Lizenz-Beschränkung – nur Lesezugriff', 'error');
+                }
+            }
+
             throw new ApiError(response.status, detail);
         }
 

src/static/js/app.js

@@ -450,6 +450,7 @@ const App = {
 
         try {
             const user = await API.getMe();
+            this.user = user;
             this._currentUsername = user.email;
             document.getElementById('header-user').textContent = user.email;
 
@@ -515,11 +516,27 @@ const App = {
                 });
             }
 
-            // Warnung bei abgelaufener Lizenz
+            // Warnung bei Read-Only (Lizenz abgelaufen oder Token-Budget aufgebraucht)
             const warningEl = document.getElementById('header-license-warning');
-            if (warningEl && user.read_only) {
+            if (warningEl) {
-                warningEl.textContent = 'Lizenz abgelaufen – nur Lesezugriff';
+                if (user.read_only) {
+                    let text = 'Nur Lesezugriff';
+                    const reason = user.read_only_reason;
+                    if (reason === 'budget_exceeded') {
+                        text = 'Token-Budget aufgebraucht – nur Lesezugriff. Bitte Verwaltung kontaktieren.';
+                    } else if (reason === 'expired') {
+                        text = 'Lizenz abgelaufen – nur Lesezugriff';
+                    } else if (reason === 'no_license') {
+                        text = 'Keine aktive Lizenz – nur Lesezugriff';
+                    } else if (reason === 'org_disabled') {
+                        text = 'Organisation deaktiviert – nur Lesezugriff';
+                    }
+                    warningEl.textContent = text;
                     warningEl.classList.add('visible');
+                } else {
+                    warningEl.textContent = '';
+                    warningEl.classList.remove('visible');
+                }
             }
 
             // --- Global Admin: Org-Switcher (herausnehmbar) ---
@@ -2130,8 +2147,19 @@ async handleRefresh() {
     _updateRefreshButton(disabled) {
         const btn = document.getElementById('refresh-btn');
         if (!btn) return;
+        // Hard-Stop: Lese-Modus (Budget aufgebraucht / Lizenz abgelaufen) -> immer disabled
+        if (this.user && this.user.read_only) {
+            btn.disabled = true;
+            const reason = this.user.read_only_reason;
+            btn.textContent = reason === 'budget_exceeded' ? 'Budget aufgebraucht' : 'Nur Lesezugriff';
+            btn.title = reason === 'budget_exceeded'
+                ? 'Token-Budget aufgebraucht. Bitte Verwaltung kontaktieren.'
+                : 'Lizenz erlaubt keinen Schreibzugriff';
+            return;
+        }
         btn.disabled = disabled;
         btn.textContent = disabled ? 'Läuft...' : 'Aktualisieren';
+        btn.title = '';
     },
 
     async handleDelete() {