Merge remote-tracking branch 'origin/main' into merge/main-into-dev

# Conflicts:
#	CLAUDE.md
#	nix/package.nix
#	packages/app/src/components/combined-model-selector.tsx
#	packages/app/src/hooks/use-sidebar-workspaces-list.ts
#	packages/app/src/screens/workspace/workspace-screen.tsx
#	packages/app/src/stores/session-store.test.ts
#	packages/server/src/client/daemon-client.ts
#	packages/server/src/server/agent/agent-manager.ts
#	packages/server/src/server/session.ts
#	packages/server/src/server/session.workspace-git-watch.test.ts
#	packages/server/src/server/session.workspaces.test.ts
#	packages/server/src/shared/messages.ts

packages/app/src/stores/panel-store.ts

@@ -66,6 +66,8 @@ interface PanelState {
   // File explorer settings (shared between mobile/desktop)
   explorerTab: ExplorerTab;
   explorerTabByCheckout: Record<string, ExplorerTab>;
+  expandedPathsByWorkspace: Record<string, string[]>;
+  diffExpandedPathsByWorkspace: Record<string, string[]>;
   activeExplorerCheckout: ExplorerCheckoutContext | null;
   sidebarWidth: number;
   explorerWidth: number;
@@ -85,6 +87,8 @@ interface PanelState {
   // File explorer settings actions
   setExplorerTab: (tab: ExplorerTab) => void;
   setExplorerTabForCheckout: (params: ExplorerCheckoutContext & { tab: ExplorerTab }) => void;
+  setExpandedPathsForWorkspace: (workspaceKey: string, paths: string[]) => void;
+  setDiffExpandedPathsForWorkspace: (workspaceKey: string, paths: string[]) => void;
   activateExplorerTabForCheckout: (checkout: ExplorerCheckoutContext) => void;
   setActiveExplorerCheckout: (checkout: ExplorerCheckoutContext | null) => void;
   setSidebarWidth: (width: number) => void;
@@ -142,6 +146,8 @@ export const usePanelStore = create<PanelState>()(
       // File explorer defaults
       explorerTab: "changes",
       explorerTabByCheckout: {},
+      expandedPathsByWorkspace: {},
+      diffExpandedPathsByWorkspace: {},
       activeExplorerCheckout: null,
       sidebarWidth: DEFAULT_SIDEBAR_WIDTH,
       explorerWidth: DEFAULT_EXPLORER_SIDEBAR_WIDTH,
@@ -261,6 +267,17 @@ export const usePanelStore = create<PanelState>()(
           }
           return nextState;
         }),
+      setExpandedPathsForWorkspace: (workspaceKey, paths) =>
+        set((state) => ({
+          expandedPathsByWorkspace: { ...state.expandedPathsByWorkspace, [workspaceKey]: paths },
+        })),
+      setDiffExpandedPathsForWorkspace: (workspaceKey, paths) =>
+        set((state) => ({
+          diffExpandedPathsByWorkspace: {
+            ...state.diffExpandedPathsByWorkspace,
+            [workspaceKey]: paths,
+          },
+        })),
       activateExplorerTabForCheckout: (checkout) =>
         set((state) => ({
           activeExplorerCheckout: checkout,
@@ -295,7 +312,7 @@ export const usePanelStore = create<PanelState>()(
     }),
     {
       name: "panel-state",
-      version: 8,
+      version: 10,
       storage: createJSONStorage(() => AsyncStorage),
       migrate: (persistedState, version) => {
         const state = persistedState as Partial<PanelState> & Record<string, unknown>;
@@ -371,6 +388,22 @@ export const usePanelStore = create<PanelState>()(
           state.sidebarWidth = DEFAULT_SIDEBAR_WIDTH;
         }
 
+        if (
+          version < 9 ||
+          typeof state.expandedPathsByWorkspace !== "object" ||
+          !state.expandedPathsByWorkspace
+        ) {
+          state.expandedPathsByWorkspace = {};
+        }
+
+        if (
+          version < 10 ||
+          typeof state.diffExpandedPathsByWorkspace !== "object" ||
+          !state.diffExpandedPathsByWorkspace
+        ) {
+          state.diffExpandedPathsByWorkspace = {};
+        }
+
         state.activeExplorerCheckout = null;
 
         return state as PanelState;
@@ -380,6 +413,8 @@ export const usePanelStore = create<PanelState>()(
         desktop: state.desktop,
         explorerTab: state.explorerTab,
         explorerTabByCheckout: state.explorerTabByCheckout,
+        expandedPathsByWorkspace: state.expandedPathsByWorkspace,
+        diffExpandedPathsByWorkspace: state.diffExpandedPathsByWorkspace,
         sidebarWidth: state.sidebarWidth,
         explorerWidth: state.explorerWidth,
         explorerSortOption: state.explorerSortOption,

packages/app/src/stores/session-store.test.ts

@@ -1,13 +1,16 @@
 import { afterEach, describe, expect, it } from "vitest";
+
 import type { DaemonClient } from "@server/client/daemon-client";
 import type { WorkspaceDescriptorPayload } from "@server/shared/messages";
+
 import {
+  mergeWorkspaceSnapshotWithExisting,
   normalizeWorkspaceDescriptor,
   useSessionStore,
   type WorkspaceDescriptor,
 } from "./session-store";
 
-function workspace(
+function createWorkspace(
   input: Partial<WorkspaceDescriptor> & Pick<WorkspaceDescriptor, "id">,
 ): WorkspaceDescriptor {
   return {
@@ -17,7 +20,7 @@ function workspace(
     projectRootPath: input.projectRootPath ?? "/repo",
     workspaceDirectory: input.workspaceDirectory ?? "/repo",
     projectKind: input.projectKind ?? "git",
-    workspaceKind: input.workspaceKind ?? "checkout",
+    workspaceKind: input.workspaceKind ?? "local_checkout",
     name: input.name ?? "main",
     status: input.status ?? "done",
     activityAt: input.activityAt ?? null,
@@ -99,11 +102,11 @@ describe("mergeWorkspaces", () => {
     store.initializeSession("test-server", null as unknown as DaemonClient);
     store.setWorkspaces(
       "test-server",
-      new Map([["/repo/main", workspace({ id: "/repo/main", services: [] })]]),
+      new Map([["/repo/main", createWorkspace({ id: "/repo/main", services: [] })]]),
     );
 
     store.mergeWorkspaces("test-server", [
-      workspace({
+      createWorkspace({
         id: "/repo/main",
         services: [
           {
@@ -130,3 +133,34 @@ describe("mergeWorkspaces", () => {
     ]);
   });
 });
+
+describe("mergeWorkspaceSnapshotWithExisting", () => {
+  it("preserves the last known diff stat when a snapshot only has baseline null data", () => {
+    const existing = createWorkspace({
+      id: "/tmp/repo",
+      diffStat: { additions: 4, deletions: 2 },
+    });
+    const incoming = createWorkspace({
+      id: "/tmp/repo",
+      diffStat: null,
+    });
+
+    expect(mergeWorkspaceSnapshotWithExisting({ incoming, existing })).toEqual({
+      ...incoming,
+      diffStat: { additions: 4, deletions: 2 },
+    });
+  });
+
+  it("uses the incoming diff stat when the server provides a known value", () => {
+    const existing = createWorkspace({
+      id: "/tmp/repo",
+      diffStat: { additions: 4, deletions: 2 },
+    });
+    const incoming = createWorkspace({
+      id: "/tmp/repo",
+      diffStat: { additions: 0, deletions: 0 },
+    });
+
+    expect(mergeWorkspaceSnapshotWithExisting({ incoming, existing })).toEqual(incoming);
+  });
+});

packages/app/src/stores/session-store.ts

@@ -147,6 +147,21 @@ export function normalizeWorkspaceDescriptor(
   };
 }
 
+export function mergeWorkspaceSnapshotWithExisting(input: {
+  incoming: WorkspaceDescriptor;
+  existing?: WorkspaceDescriptor | null;
+}): WorkspaceDescriptor {
+  const { incoming, existing } = input;
+  if (!existing || existing.id !== incoming.id) {
+    return incoming;
+  }
+
+  return {
+    ...incoming,
+    diffStat: incoming.diffStat ?? existing.diffStat,
+  };
+}
+
 export type ExplorerEntryKind = "file" | "directory";
 export type ExplorerFileKind = "text" | "image" | "binary";
 export type ExplorerEncoding = "utf-8" | "base64" | "none";