feat: support multiple event proposals in single AI response

- Change proposedChange to proposedChanges array in ChatMessage type
- Add unique id and individual respondedAction to each ProposedEventChange
- Implement arrow navigation UI for multiple proposals with "Event X von Y" counter
- Add updateProposalResponse() method for per-proposal confirm/reject tracking
- GPTAdapter now collects multiple tool call results into proposals array
- Add RRULE documentation to system prompt (separate events for different times)
- Fix RRULE parsing to strip RRULE: prefix if present
- Add log summarization for large args (conversationHistory, existingEvents)
- Keep proposedChanges logged in full for debugging AI issues

apps/server/src/repositories/mongo/MongoChatRepository.ts

@@ -53,7 +53,7 @@ export class MongoChatRepository implements ChatRepository {
       conversationId: conversationId,
       sender: message.sender,
       content: message.content,
-      proposedChange: message.proposedChange,
+      proposedChanges: message.proposedChanges,
     });
     return repoMessage.toJSON() as unknown as ChatMessage;
   }
@@ -69,4 +69,17 @@ export class MongoChatRepository implements ChatRepository {
     );
     return doc ? (doc.toJSON() as unknown as ChatMessage) : null;
   }
+
+  async updateProposalResponse(
+    messageId: string,
+    proposalId: string,
+    respondedAction: "confirm" | "reject",
+  ): Promise<ChatMessage | null> {
+    const doc = await ChatMessageModel.findOneAndUpdate(
+      { _id: messageId, "proposedChanges.id": proposalId },
+      { $set: { "proposedChanges.$.respondedAction": respondedAction } },
+      { new: true },
+    );
+    return doc ? (doc.toJSON() as unknown as ChatMessage) : null;
+  }
 }

apps/server/src/repositories/mongo/models/ChatModel.ts

@@ -44,6 +44,7 @@ const UpdatesSchema = new Schema<UpdateEventDTO>(
 
 const ProposedChangeSchema = new Schema<ProposedEventChange>(
   {
+    id: { type: String, required: true },
     action: {
       type: String,
       enum: ["create", "update", "delete"],
@@ -52,6 +53,10 @@ const ProposedChangeSchema = new Schema<ProposedEventChange>(
     eventId: { type: String },
     event: { type: EventSchema },
     updates: { type: UpdatesSchema },
+    respondedAction: {
+      type: String,
+      enum: ["confirm", "reject"],
+    },
   },
   { _id: false },
 );
@@ -77,12 +82,9 @@ const ChatMessageSchema = new Schema<
       type: String,
       required: true,
     },
-    proposedChange: {
-      type: ProposedChangeSchema,
-    },
-    respondedAction: {
-      type: String,
-      enum: ["confirm", "reject"],
+    proposedChanges: {
+      type: [ProposedChangeSchema],
+      default: undefined,
     },
   },
   {