feat(characters): support character-scoped conversations

src/stores/chat/chat-history-sync.ts

@@ -1,5 +1,5 @@
 import type { UiMessage } from "@/data/dto/chat";
-import { resolveChatCacheOwnerKey } from "@/data/repositories/chat_cache_identity";
+import { resolveChatConversationKey } from "@/data/repositories/chat_cache_identity";
 import { loadChatRepository } from "@/data/repositories/chat_repository_loader";
 import { Logger } from "@/utils/logger";
 import { Result } from "@/utils/result";
@@ -41,8 +41,10 @@ export function createGreetingMessage(): UiMessage {
   };
 }
 
-export async function resolveHistoryCacheIdentity(): Promise<string | null> {
-  const result = await resolveChatCacheOwnerKey();
+export async function resolveHistoryCacheIdentity(
+  characterId: string,
+): Promise<string | null> {
+  const result = await resolveChatConversationKey(characterId);
   return Result.isOk(result) ? result.data : null;
 }
 
@@ -76,13 +78,18 @@ export async function readLocalHistorySnapshot(
 }
 
 export async function syncNetworkHistory(
+  characterId: string,
   localCount: number,
   cacheIdentity: string | null,
 ): Promise<NetworkHistorySyncOutput | null> {
   const chatRepo = await loadChatRepository();
   const greetingMessage = createGreetingMessage();
 
-  const networkResult = await chatRepo.getHistory(CHAT_HISTORY_LIMIT, 0);
+  const networkResult = await chatRepo.getHistory(
+    characterId,
+    CHAT_HISTORY_LIMIT,
+    0,
+  );
   if (Result.isErr(networkResult)) {
     log.error("[chat-machine] loadHistory NETWORK FAILED", {
       error: networkResult.error,
@@ -97,6 +104,7 @@ export async function syncNetworkHistory(
   if (cacheIdentity) {
     void chatRepo.prefetchMediaForMessages(
       networkResult.data.messages,
+      characterId,
       cacheIdentity,
     );
   }
@@ -134,10 +142,13 @@ export async function syncNetworkHistory(
  * 2. Read network history as the authoritative source.
  * 3. Overwrite local history with network data.
  */
-export async function readAndSyncHistory(): Promise<ReadAndSyncHistoryOutput> {
-  const cacheIdentity = await resolveHistoryCacheIdentity();
+export async function readAndSyncHistory(
+  characterId: string,
+): Promise<ReadAndSyncHistoryOutput> {
+  const cacheIdentity = await resolveHistoryCacheIdentity(characterId);
   const localSnapshot = await readLocalHistorySnapshot(cacheIdentity);
   const networkSnapshot = await syncNetworkHistory(
+    characterId,
     localSnapshot.localCount,
     cacheIdentity,
   );