feat(forge): pluggable forge abstraction + GitLab and Gitea/Forgejo/Codeberg (#1913)

* refactor(forge): forge-neutral foundation (GitHub-only)

Decouple git-hosting from GitHub behind a neutral abstraction (issue #1616), GitHub-only for now; existing GitHub behaviour is unchanged.

- Forge manifest, neutral ForgeService contract, forge registry + resolver, and a client forge-module registry.
- GitHub code renamed to the neutral shape; PR/Issue attachment wording preserved.
- forge.search.response enums parse tolerantly (unknown kind/auth state degrade instead of breaking the client).
- createPullRequest reports typed CLI/auth errors instead of a generic message.
- forge-resolver host/remote caches are LRU-bounded.
- Forge host trust is explicit: only a known cloud host or a CLI-authenticated host is ever talked to; an unauthenticated GitHub Enterprise host fails resolution instead of routing to github.com.
- Docs: forge-providers guide, glossary and i18n forge-copy conventions, architecture and rpc-namespacing terminology.
- Vitest React Native mocks (unistyles, svg, linking, lucide) consolidated into shared aliased test-stubs.

* feat(forge): GitLab adapter, forge-aware UI, pipelines and approvals

GitLab adapter over the glab CLI on the neutral contracts: MR status, forge-aware UI, pipeline tree, and N-of-M approvals.

- threadIsResolved is part of the neutral timeline item.
- Pipeline load failures show an error instead of an empty section.
- Manual pipeline jobs render as pending.
- Fork/detached MR head pipelines are fetched by MR iid (glab ci get --merge-request).

* feat(forge): Gitea family adapter (Gitea, Forgejo, Codeberg)

One adapter over the tea CLI serving Gitea, Forgejo, and Codeberg on the neutral contracts.

- CI status aggregates commit statuses and Actions runs together.
- Gitea's terminal "warning" state maps to failure on server and client.
- Gitea Actions check details are reachable from the PR pane by workflowRunId.

* refactor(forge): localize compatibility handling

* test(forge): expect normalized GitLab facts

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/protocol/src/messages.workspaces.test.ts

@@ -982,6 +982,30 @@ describe("workspace message schemas", () => {
     expect(checkout?.worktreeRoot).toBe("C:\\repo");
   });
 
+  test("workspace summary parses without forge and round-trips forge when present", () => {
+    const baseWorkspace = {
+      id: "ws-forge",
+      projectId: "proj",
+      projectDisplayName: "repo",
+      projectRootPath: "/repo",
+      workspaceDirectory: "/repo",
+      projectKind: "git",
+      workspaceKind: "worktree",
+      name: "feature",
+      status: "done",
+      activityAt: null,
+      scripts: [],
+    } as const;
+
+    // Old daemon: forge omitted -> parses, field absent (client falls back to github).
+    expect(WorkspaceDescriptorPayloadSchema.parse(baseWorkspace).forge).toBeUndefined();
+
+    // New daemon: forge present -> round-trips (open string, like the PR-status forge).
+    expect(
+      WorkspaceDescriptorPayloadSchema.parse({ ...baseWorkspace, forge: "gitlab" }).forge,
+    ).toBe("gitlab");
+  });
+
   test("workspace.create.request rejects old flat backing shape and accepts new source envelope", () => {
     // Old flat shape with backing enum must be rejected.
     const oldFlat = WorkspaceCreateRequestSchema.safeParse({