fix(web): fehlende Uebersetzungen — Kalenderquellen-Formular (18 Schluessel), Kalender-Einstellungen (2), Marktplatz (1) in de/en nachgetragen; Changelog Behoben

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018N9CD3ebPKm1b32bPpBknY

apps/web/src/messages/en.json

@@ -211,7 +211,27 @@
       "connectionSuccess": "Connection successful",
       "connectionError": "Connection failed. Please check the URL and credentials.",
       "addSource": "Add source",
-      "sourceEmpty": "No calendar sources configured. Add a source to display events."
+      "sourceEmpty": "No calendar sources configured. Add a source to display events.",
+      "formFieldName": "Name",
+      "formFieldType": "Type",
+      "formFieldExchangeMode": "Exchange connection",
+      "formFieldDomain": "Domain",
+      "formFieldDomainHint": "Optional – only needed if your Exchange server expects DOMAIN\\user for sign-in.",
+      "formFieldUrl": "Address (URL)",
+      "formFieldUsername": "Username",
+      "formFieldPassword": "Password",
+      "formFieldColor": "Color",
+      "formSave": "Save",
+      "formSaving": "Saving …",
+      "formTestConnection": "Test connection",
+      "formTesting": "Checking connection …",
+      "formTestSuccess": "Connection successful.",
+      "formTestFailed": "Connection failed. Please check the address and credentials.",
+      "formCancel": "Cancel",
+      "formUrlErrorHttps": "The address must start with https://.",
+      "formUrlErrorInvalid": "Please enter a valid address.",
+      "saveSuccess": "Calendar source saved.",
+      "saveError": "The calendar source could not be saved."
     },
     "note": {
       "name": "Notes",
@@ -674,7 +694,8 @@
     "detailStatusInactive": "Not activated",
     "accessDenied": "Access denied",
     "statusNoAccess": "No Access",
-    "toastNoAccess": "No access to this module — please contact your administrator."
+    "toastNoAccess": "No access to this module — please contact your administrator.",
+    "notFound": "This module was not found."
   },
   "certManager": {
     "title": "Certificate Manager",