feat(chat): add private message unlock flow

src/data/storage/chat/local_message.ts

@@ -23,6 +23,9 @@ export const LocalMessageSchema = z.object({
   content: z.string(),
   createdAt: z.string().default(""),
   imageUrl: z.string().nullable().default(null),
+  isPrivate: z.boolean().nullable().default(null),
+  privateLocked: z.boolean().nullable().default(null),
+  privateHint: z.string().nullable().default(null),
   sessionId: z.string().default(""),
 });
 
@@ -35,6 +38,9 @@ export class LocalMessage {
   declare readonly content: string;
   declare readonly createdAt: string;
   declare readonly imageUrl: string | null;
+  declare readonly isPrivate: boolean | null;
+  declare readonly privateLocked: boolean | null;
+  declare readonly privateHint: string | null;
   declare readonly sessionId: string;
 
   private constructor(input: LocalMessageInput) {
@@ -63,6 +69,9 @@ export class LocalMessage {
       content: this.content,
       createdAt: this.createdAt,
       imageUrl: this.imageUrl,
+      isPrivate: this.isPrivate,
+      privateLocked: this.privateLocked,
+      privateHint: this.privateHint,
       sessionId: this.sessionId,
     };
   }
@@ -75,6 +84,9 @@ export class LocalMessage {
       content: row.content,
       createdAt: row.createdAt,
       imageUrl: row.imageUrl ?? null,
+      isPrivate: row.isPrivate ?? null,
+      privateLocked: row.privateLocked ?? null,
+      privateHint: row.privateHint ?? null,
       sessionId: row.sessionId,
     });
   }