Fix provider models per workspace (#1167)

* Scope provider snapshots by workspace

* Fix provider snapshot cwd test on Windows

packages/app/src/screens/new-workspace-screen.tsx

@@ -381,7 +381,10 @@ function buildComposerConfig(input: {
   const { serverId, isConnected, workspaceDirectory, sourceDirectory } = input;
   return {
     initialServerId: serverId || null,
-    initialValues: workspaceDirectory ? { workingDir: workspaceDirectory } : undefined,
+    initialValues:
+      workspaceDirectory || sourceDirectory
+        ? { workingDir: workspaceDirectory || sourceDirectory }
+        : undefined,
     isVisible: true,
     onlineServerIds: isConnected && serverId ? [serverId] : [],
     lockedWorkingDir: workspaceDirectory || sourceDirectory || undefined,

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -1502,8 +1502,9 @@ function WorkspaceScreenContent({
     setIsImportSheetVisible(false);
   }, []);
 
-  // Warm the global provider snapshot so the model picker is ready when opened.
+  // Warm the workspace-scoped provider snapshot so the model picker is ready when opened.
   useProvidersSnapshot(normalizedServerId, {
+    cwd: workspaceDirectory,
     enabled: isRouteFocused,
   });