Show New Workspace isolation controls immediately (#2702)

* fix(workspaces): show isolation without checkout delay

* fix(workspaces): trust hydrated project capability

* fix(workspaces): resolve branch before creation

* fix(workspaces): honor invalidated checkout status

* fix(workspaces): preserve isolation while projects load

* fix(workspaces): keep provisional project routes usable

Route-derived projects do not know their worktree capability. Represent that uncertainty at the placement boundary so remembered worktree intent survives hydration without disabling the New Workspace screen indefinitely.

packages/app/src/utils/sidebar-project-row-model.test.ts

@@ -44,7 +44,11 @@ function project(overrides: ProjectOverrides = {}): SidebarProjectEntry {
   const projectKind = overrides.projectKind ?? "git";
   const hosts = Array.from(
     overrides.hosts ?? [
-      { serverId: "srv", iconWorkingDir: "/repo", canCreateWorktree: projectKind === "git" },
+      {
+        serverId: "srv",
+        iconWorkingDir: "/repo",
+        worktreeSupport: projectKind === "git" ? "supported" : "unsupported",
+      },
     ],
     (host) => Object.assign({}, host, { projectId: host.projectId ?? `project-${host.serverId}` }),
   );
@@ -135,8 +139,12 @@ describe("buildSidebarProjectRowModel", () => {
     const result = buildSidebarProjectRowModel({
       project: project({
         hosts: [
-          { serverId: "host-a", iconWorkingDir: "/repo/a", canCreateWorktree: false },
-          { serverId: "host-b", iconWorkingDir: "/repo/b", canCreateWorktree: true },
+          {
+            serverId: "host-a",
+            iconWorkingDir: "/repo/a",
+            worktreeSupport: "unsupported" as const,
+          },
+          { serverId: "host-b", iconWorkingDir: "/repo/b", worktreeSupport: "supported" as const },
         ],
       }),
       collapsed: false,
@@ -155,8 +163,16 @@ describe("buildSidebarProjectRowModel", () => {
       project: project({
         projectKind: "directory",
         hosts: [
-          { serverId: "host-a", iconWorkingDir: "/repo/a", canCreateWorktree: false },
-          { serverId: "host-b", iconWorkingDir: "/repo/b", canCreateWorktree: false },
+          {
+            serverId: "host-a",
+            iconWorkingDir: "/repo/a",
+            worktreeSupport: "unsupported" as const,
+          },
+          {
+            serverId: "host-b",
+            iconWorkingDir: "/repo/b",
+            worktreeSupport: "unsupported" as const,
+          },
         ],
       }),
       collapsed: false,
@@ -197,8 +213,8 @@ describe("buildSidebarProjectRowModel", () => {
     const iconTarget = resolveSidebarProjectIconTarget(
       project({
         hosts: [
-          { serverId: "host-b", iconWorkingDir: "/repo/b", canCreateWorktree: true },
-          { serverId: "host-a", iconWorkingDir: "/repo/a", canCreateWorktree: true },
+          { serverId: "host-b", iconWorkingDir: "/repo/b", worktreeSupport: "supported" as const },
+          { serverId: "host-a", iconWorkingDir: "/repo/a", worktreeSupport: "supported" as const },
         ],
       }),
     );
@@ -214,7 +230,9 @@ describe("buildSidebarProjectRowModel", () => {
     const [iconTarget] = resolveSidebarProjectIconTargets([
       project({
         viewKey: '["placement","host-b","project-b"]',
-        hosts: [{ serverId: "host-b", iconWorkingDir: "/repo/b", canCreateWorktree: true }],
+        hosts: [
+          { serverId: "host-b", iconWorkingDir: "/repo/b", worktreeSupport: "supported" as const },
+        ],
       }),
     ]);
 
@@ -230,8 +248,12 @@ describe("buildSidebarProjectRowModel", () => {
     const groupedProject = project({
       iconWorkingDir: "/remote/repo",
       hosts: [
-        { serverId: "remote", iconWorkingDir: "/remote/repo", canCreateWorktree: true },
-        { serverId: "local", iconWorkingDir: "/local/repo", canCreateWorktree: true },
+        {
+          serverId: "remote",
+          iconWorkingDir: "/remote/repo",
+          worktreeSupport: "supported" as const,
+        },
+        { serverId: "local", iconWorkingDir: "/local/repo", worktreeSupport: "supported" as const },
       ],
     });
 

packages/app/src/utils/sidebar-project-row-model.ts

@@ -75,7 +75,10 @@ function resolveNewWorkspaceTarget(
   supportsMultiplicityByServerId: ReadonlyMap<string, boolean>,
 ): SidebarProjectHostTarget | null {
   for (const host of project.hosts) {
-    if (!host.canCreateWorktree && !supportsMultiplicityByServerId.get(host.serverId)) {
+    if (
+      host.worktreeSupport === "unsupported" &&
+      !supportsMultiplicityByServerId.get(host.serverId)
+    ) {
       continue;
     }
     const target = hostTarget(host);

packages/app/src/utils/sidebar-shortcuts.test.ts

@@ -55,7 +55,7 @@ function project(projectKey: string, workspaces: SidebarWorkspaceEntry[]): Sideb
         serverId: workspaces[0]?.serverId ?? "s1",
         projectId: projectKey,
         iconWorkingDir: workspaces[0]?.workspaceDirectory ?? "",
-        canCreateWorktree: true,
+        worktreeSupport: "supported" as const,
       },
     ],
     workspaces,
@@ -150,7 +150,7 @@ describe("buildSidebarShortcutModel", () => {
     directoryProject.projectKind = "directory";
     directoryProject.hosts = directoryProject.hosts.map((host) => ({
       ...host,
-      canCreateWorktree: false,
+      worktreeSupport: "unsupported" as const,
     }));
 
     const model = buildSidebarShortcutModel({