fix: silence state_referenced_locally warning + sync draft model on catalog fetch

- Use DEFAULT_MODEL directly when creating the initial draft store instead
  of reading the $state activeModel in a non-reactive context (init-time
  read only captures the initial value — semantically identical since
  activeModel === DEFAULT_MODEL at that point, but silences the Svelte
  state_referenced_locally warning).
- Sync the draft store's model when the model catalog fetch corrects
  activeModel (default not in catalog). Without this, chat.send would use
  the stale DEFAULT_MODEL while the UI showed the corrected model.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/app/store.svelte.ts b/src/app/store.svelte.ts
index 05577a6..e8bb5e1 100644
--- a/src/app/store.svelte.ts
+++ b/src/app/store.svelte.ts
@@ -231,7 +231,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 	}
 
 	const initialDraftId = randomId();
-	let draftStore: ChatStore = createChatFor(initialDraftId, activeModel);
+	let draftStore: ChatStore = createChatFor(initialDraftId, DEFAULT_MODEL);
 	let draftConversationId: string = initialDraftId;
 
 	let activeChat = $state<ChatStore>(draftStore as ChatStore);
@@ -446,6 +446,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 				const first = data.models[0];
 				if (first !== undefined) {
 					activeModel = first;
+					draftStore.setModel(first);
 				}
 			}
 		})