feat(workspaces): archive option + archived-workspaces view

Consume the backend's archive contract (feature/archive-workspaces):

- adapter/http: archive(id)/unarchive(id) (PUT/DELETE /workspaces/:id/archive);
  list(archived?) passes the ?archived= query
- logic/view-model: pure applyArchived(list, id, archived)
- store.svelte: setArchived(id, archived) (optimistic + revert-on-error +
  reconciling refresh); archivedList + refreshArchived() for the archived view
- ui/TileActionBar: new Archive action (the right-click→select action bar)
- ui/HomeHeader: new Archived button opens the archived view
- ui/ArchivedWorkspaces (new): modal listing archived workspaces with
  Unarchive + View (navigates to /<id>)
- ui/WorkspacesHome: wire the Archive action + the Archived modal
- .dispatch/wire.reference.md + backend-handoff.md: record the contract delta

1 files changed, 5 insertions, 0 deletions

diff --git a/src/features/workspaces/ui/TileActionBar.test.ts b/src/features/workspaces/ui/TileActionBar.test.ts
index 4b0377e..c00de19 100644
--- a/src/features/workspaces/ui/TileActionBar.test.ts
+++ b/src/features/workspaces/ui/TileActionBar.test.ts
@@ -11,6 +11,7 @@ function ws(overrides: Partial<WorkspaceEntry> = {}): WorkspaceEntry {
     defaultCwd: null,
     defaultComputerId: null,
     starred: false,
+    archived: false,
     createdAt: 1,
     lastActivityAt: 2,
     conversationCount: 0,
@@ -26,6 +27,7 @@ function handlers() {
     onToggleStar: vi.fn(),
     onDetails: vi.fn(),
     onPlugins: vi.fn(),
+    onArchive: vi.fn(),
     onDelete: vi.fn(),
     onClose: vi.fn(),
   };
@@ -40,6 +42,7 @@ describe("TileActionBar", () => {
     expect(screen.getByRole("button", { name: "Resize" })).toBeInTheDocument();
     expect(screen.getByRole("button", { name: "Star" })).toBeInTheDocument();
     expect(screen.getByRole("button", { name: "Details" })).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: "Archive" })).toBeInTheDocument();
     expect(screen.getByRole("button", { name: "Delete" })).toBeInTheDocument();
     expect(screen.getByRole("button", { name: "Close actions" })).toBeInTheDocument();
   });
@@ -74,6 +77,7 @@ describe("TileActionBar", () => {
     await user.click(screen.getByRole("button", { name: "Resize" }));
     await user.click(screen.getByRole("button", { name: "Star" }));
     await user.click(screen.getByRole("button", { name: "Details" }));
+    await user.click(screen.getByRole("button", { name: "Archive" }));
     await user.click(screen.getByRole("button", { name: "Delete" }));
     await user.click(screen.getByRole("button", { name: "Close actions" }));
 
@@ -82,6 +86,7 @@ describe("TileActionBar", () => {
     expect(h.onResize).toHaveBeenCalledTimes(1);
     expect(h.onToggleStar).toHaveBeenCalledTimes(1);
     expect(h.onDetails).toHaveBeenCalledTimes(1);
+    expect(h.onArchive).toHaveBeenCalledTimes(1);
     expect(h.onDelete).toHaveBeenCalledTimes(1);
     expect(h.onClose).toHaveBeenCalledTimes(1);
   });