L17 Pakete: Stufen Basis/Profi, Lotse-Chat-Plätze und Kontingent

- Datenmodell: Tenant.tier (Default PROFI), lotseChatSeats, lotseChatHardLimit;
  Tabelle lotse_chat_seats (RLS, TENANT_MODELS, pii-fields), Index für die
  Monatszählung der Chat-Nachrichten (Migration 20260921100000_pakete)
- src/lib/plans.ts: Stufenregeln, 150 Chats je Platz, Mehrverbrauch in 100er-Paketen
- src/server/plan.ts: effektive Freischaltung = Stufe UND TenantModule, genutzt von
  requireModule, assertModuleEnabled, API, Sync (Offline-Op → rejected mit Klartext),
  Navigation, isLotseEnabled und planningAccess (Planung nur in Profi)
- Lotse-Chat: Platzprüfung (no_seat), Testphase ohne Platz, Kontingent mit
  hartem Limit (quota_exhausted); Platzvergabe durch den Mandanten-Admin
- Betreiber: Stufe/Plätze/hartes Limit im Mandantendetail mit Bestätigung
  und Plattform-Audit, Verbrauch laufender Monat/Vormonat, Stufe als Badge
- Demo-Seed: demo = Profi mit 3 Plätzen, demo2 = Basis
- Tests: test-pakete-{rules,gates,seats}

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

messages/en/lotse.json

@@ -317,11 +317,15 @@
       "transition_forbidden": "You lack the permission.",
       "not_editable": "The report has been submitted and can no longer be changed.",
       "reason_required": "The reason is missing.",
-      "use_billing_overview": "Only possible via the billing overview."
+      "use_billing_overview": "Only possible via the billing overview.",
+      "not_in_plan": "The Lotse is included in the Profi package and not activated for this company.",
+      "no_seat": "The Lotse chat is not activated for you yet – please ask the office.",
+      "quota_exhausted": "The company's chat quota for this month is used up."
     },
     "unavailable": {
       "title": "Lotse chat not available",
       "back": "Back to overview"
-    }
+    },
+    "quotaExhausted": "The company's chat quota for this month is used up. You can write again from next month – the office can help with questions."
   }
 }

messages/en/offline.json

@@ -92,7 +92,9 @@
     "internal": "Technical error – will retry automatically.",
     "timeOverlap": "The added time overlaps with time already recorded and was not accepted.",
     "timeWindow": "The added time is outside the allowed 7 days, in the future or too long and was not accepted.",
-    "otherSession": "Time was still running on another order – the start was not accepted. Please start again and switch."
+    "otherSession": "Time was still running on another order – the start was not accepted. Please start again and switch.",
+    "notInPlan": "Included in the Profi package – not activated for this company. The entry was not applied, please contact the office.",
+    "moduleDisabled": "This function is switched off for this company. The entry was not applied, please contact the office."
   },
   "view": {
     "title": "Offline view",

messages/en/plans.json

@@ -0,0 +1,93 @@
+{
+  "tier": {
+    "BASIS": "Basic",
+    "PROFI": "Profi"
+  },
+  "colTier": "Package",
+  "notInTier": "Profi package only",
+  "profiHint": {
+    "title": "Included in the Profi package",
+    "text": "This function is part of the Profi package. Your company uses the Basic package – please contact your Craftvia representative to upgrade."
+  },
+  "admin": {
+    "title": "Package & Lotse chat",
+    "sub": "Package of the company, chat seats for technicians and usage in the current month",
+    "package": "Package",
+    "trial": "Trial (all functions)",
+    "packageReadOnly": "The provider sets the package and the number of chat seats. Here you assign the purchased seats to your technicians and team leads.",
+    "basisHint": "Lotse and the Lotse chat are included in the Profi package. Assigned seats and chat histories are kept and available again after switching to Profi.",
+    "seatsTitle": "Chat seats",
+    "seatsCount": "{assigned} of {purchased} seats assigned",
+    "trialSeats": "During the trial all technicians and team leads may use the Lotse chat – no seats need to be assigned (quota: {perSeat} chats per person and month).",
+    "noSeatsBought": "No chat seats purchased yet. The provider books seats for your company.",
+    "overbooked": "More seats assigned than purchased ({purchased}). Only the seats assigned first are valid – please revoke seats.",
+    "noFieldUsers": "No active users with a field role (technician, team lead).",
+    "seatAssigned": "Seat assigned",
+    "seatOverbooked": "Above the seat number",
+    "seatNone": "No seat",
+    "assign": "Assign seat",
+    "revoke": "Revoke seat",
+    "assignLabel": "Assign chat seat to {name}",
+    "revokeLabel": "Revoke chat seat from {name}",
+    "saved": "Chat seat saved.",
+    "usageTitle": "Usage {month}",
+    "usageText": "{used} of {quota} chats",
+    "quotaRule": "Quota: {perSeat} chats per assigned seat and month, shared by the company (basis: {basis}). One chat is one message to the Lotse.",
+    "warn80": "{percent} % of the monthly quota are used.",
+    "exhausted": "The monthly quota is used up. Further chats are billed as overage in packs of {pack}.",
+    "hardLimitReached": "The monthly quota is used up. The Lotse chat is blocked until the end of the month (hard limit).",
+    "overage": "Overage: {overage} chats – equals {packs, plural, one {# pack} other {# packs}} of {pack} chats.",
+    "perUserCaption": "Chats per user in the current month",
+    "perUserName": "User",
+    "perUserChats": "Chats",
+    "errors": {
+      "no_seats_left": "All purchased seats are assigned. Please revoke a seat first or book more seats with the provider.",
+      "not_eligible": "This person cannot get a chat seat (no active field role).",
+      "not_in_plan": "The Lotse chat is included in the Profi package.",
+      "disabled": "Lotse is switched off for this company.",
+      "forbidden": "You are not allowed to do this.",
+      "trial_expired": "Trial expired – read-only access.",
+      "failed": "Could not save."
+    }
+  },
+  "platform": {
+    "title": "Package & Lotse chat",
+    "tier": "Package",
+    "trialProfi": "Trial = Profi",
+    "seats": "Chat seats",
+    "seatsValue": "{assigned} assigned / {purchased} purchased",
+    "hardLimit": "Hard limit",
+    "hardLimitOn": "on – blocked at the quota",
+    "hardLimitOff": "off – overage is counted",
+    "rule": "{perSeat} chats per assigned seat and month (tenant timezone); overage in packs of {pack}.",
+    "currentMonth": "Current month · {month}",
+    "previousMonth": "Previous month · {month}",
+    "chats": "{used} of {quota} chats",
+    "overage": "Overage {overage} chats → {packs, plural, one {# pack} other {# packs}} of {pack}",
+    "noOverage": "No overage",
+    "edit": "Change package …",
+    "editTitle": "Change package & chat seats",
+    "editText": "The change applies immediately to all users of the tenant and is logged in the platform audit.",
+    "tierHint": {
+      "BASIS": "Without AI and planning: no Lotse, no planning board/live situation, no billing overview, no emergency service, no order import.",
+      "PROFI": "All functions incl. planning, billing overview, emergency service, import and Lotse."
+    },
+    "downgradeHint": "Switching to Basic keeps all data, only access ends. Back on Profi everything is available again.",
+    "seatsInput": "Purchased chat seats",
+    "seatsHint": "The tenant admin assigns the seats to users with a field role.",
+    "hardLimitInput": "Hard limit",
+    "hardLimitHint": "When the monthly quota is used up the chat is blocked instead of counting overage.",
+    "confirm": "I checked the impact and confirm the change.",
+    "submit": "Save",
+    "submitting": "Saving …",
+    "close": "Close",
+    "saved": "Package saved.",
+    "errors": {
+      "confirm_required": "Please confirm the change.",
+      "invalid_input": "Please check the input (seats 0–1000).",
+      "tenant_archived": "The tenant is archived.",
+      "platform_admin_required": "Only full administrators may change the package.",
+      "failed": "Could not save."
+    }
+  }
+}