Keep selected projects when switching hosts (#2700)

* fix(app): preserve project selection across hosts

Rendered project identity and persisted equivalence were conflated after duplicate-project handling. Keep them separate so host changes resolve selectable equivalents deterministically without resetting legacy sidebar identity.

* fix(app): restore selected clone after host round trip

Keep manual origin and current destination placements separately so switching back restores the chosen checkout while archive gaps preserve the active host selection.

* fix(app): key status icons by project view

* fix(app): preserve origin during archive gaps

packages/app/src/hooks/use-sidebar-pins.test.ts

@@ -10,7 +10,7 @@ function placement(workspaceKey: string): SidebarWorkspacePlacement {
     workspaceKey,
     serverId: "s1",
     workspaceId: workspaceKey,
-    projectKey: "p1",
+    projectViewKey: "p1",
     projectName: "Project 1",
     projectKind: "git",
     workspaceKind: "worktree",
@@ -20,7 +20,7 @@ function placement(workspaceKey: string): SidebarWorkspacePlacement {
 
 function project(projectKey: string, workspaces: SidebarWorkspacePlacement[]): SidebarProjectEntry {
   return {
-    projectKey,
+    viewKey: projectKey,
     projectName: projectKey,
     projectKind: "git",
     iconWorkingDir: "",