fix: prevent duplicate AI models in selector and fix TypeScript errors

Changes:
1. Enhanced removeDuplicateProviders() to filter out duplicate providers from SDK
   when the same provider exists in extras (qwen-oauth, zai, ollama-cloud, antigravity)
2. Added logic to remove any Qwen-related SDK providers when qwen-oauth is authenticated
3. Fixed missing setActiveParentSession import in instance-shell2.tsx

These changes ensure:
- No duplicate models appear in the model selector
- Qwen OAuth models don't duplicate with any SDK Qwen providers
- TypeScript compilation passes successfully

packages/ui/src/stores/session-api.ts

@@ -331,20 +331,32 @@ async function fetchExtraProviders(): Promise<Provider[]> {
 }
 
 function removeDuplicateProviders(base: Provider[], extras: Provider[]): Provider[] {
+  // Collect all extra provider IDs and model IDs to prevent duplicates
+  const extraProviderIds = new Set(extras.map((provider) => provider.id))
   const extraModelIds = new Set(extras.flatMap((provider) => provider.models.map((model) => model.id)))
-  if (!extras.some((provider) => provider.id === "opencode-zen")) {
-    return base
-  }
 
   return base.filter((provider) => {
-    if (provider.id === "opencode-zen") return false
-    if (provider.id === "opencode" && provider.models.every((model) => extraModelIds.has(model.id))) {
+    // Remove base providers that have the same ID as an extra provider
+    // This prevents qwen-oauth, zai, ollama-cloud, antigravity duplicates
+    if (extraProviderIds.has(provider.id)) {
+      return false
+    }
+    // Special case: remove opencode if opencode-zen is present and covers all models
+    if (provider.id === "opencode" && extraProviderIds.has("opencode-zen") &&
+      provider.models.every((model) => extraModelIds.has(model.id))) {
+      return false
+    }
+    // Remove any qwen-related SDK providers when qwen-oauth is present
+    if (extraProviderIds.has("qwen-oauth") &&
+      (provider.id.toLowerCase().includes("qwen") ||
+        provider.models.some((m) => m.id.toLowerCase().includes("qwen")))) {
       return false
     }
     return true
   })
 }
 
+
 interface SessionForkResponse {
   id: string
   title?: string