feat(chat): support ai photo viewing

src/data/storage/chat/local_message.ts

@@ -22,6 +22,7 @@ export const LocalMessageSchema = z.object({
   role: z.string(),
   content: z.string(),
   createdAt: z.string().default(""),
+  imageUrl: z.string().nullable().default(null),
   sessionId: z.string().default(""),
 });
 
@@ -33,6 +34,7 @@ export class LocalMessage {
   declare readonly role: string;
   declare readonly content: string;
   declare readonly createdAt: string;
+  declare readonly imageUrl: string | null;
   declare readonly sessionId: string;
 
   private constructor(input: LocalMessageInput) {
@@ -60,6 +62,7 @@ export class LocalMessage {
       role: this.role,
       content: this.content,
       createdAt: this.createdAt,
+      imageUrl: this.imageUrl,
       sessionId: this.sessionId,
     };
   }
@@ -71,6 +74,7 @@ export class LocalMessage {
       role: row.role,
       content: row.content,
       createdAt: row.createdAt,
+      imageUrl: row.imageUrl ?? null,
       sessionId: row.sessionId,
     });
   }