feat(chat): add private message unlock flow

src/data/repositories/chat_repository.ts

@@ -68,6 +68,39 @@ export class ChatRepository implements IChatRepository {
     );
   }
 
+  /** 把本地缓存中的私密消息标记为已解锁。 */
+  async markPrivateMessageUnlockedInLocal(
+    messageId: string,
+    content: string,
+  ): Promise<Result<void>> {
+    return Result.wrap(async () => {
+      const localResult = await this.getLocalMessages();
+      if (Result.isErr(localResult)) {
+        throw localResult.error;
+      }
+
+      let changed = false;
+      const updatedMessages = localResult.data.map((message) => {
+        if (message.id !== messageId) return message;
+        changed = true;
+        return ChatMessage.from({
+          ...message.toJson(),
+          content,
+          isPrivate: message.isPrivate ?? true,
+          privateLocked: false,
+          privateHint: null,
+        });
+      });
+
+      if (!changed) return;
+
+      const saveResult = await this.saveMessagesToLocal(updatedMessages);
+      if (Result.isErr(saveResult)) {
+        throw saveResult.error;
+      }
+    });
+  }
+
   // ============ 本地（Dexie）操作 ============
 
   /** 把一条消息写入本地存储。 */
@@ -125,6 +158,9 @@ export class ChatRepository implements IChatRepository {
       content: message.content,
       createdAt: message.createdAt,
       imageUrl: message.imageUrl,
+      isPrivate: message.isPrivate,
+      privateLocked: message.privateLocked,
+      privateHint: message.privateHint,
       sessionId: "",
     });
   }
@@ -137,6 +173,9 @@ export class ChatRepository implements IChatRepository {
       content: local.content,
       createdAt: local.createdAt,
       imageUrl: local.imageUrl,
+      isPrivate: local.isPrivate,
+      privateLocked: local.privateLocked,
+      privateHint: local.privateHint,
     });
   }