fix(ci): build shared package before the ui-publish desktop chat test

The desktop chat integration test renders components from @cline/ui, but
it also pulls @cline/shared/browser through the desktop app's own
message-content module. That subpath resolves to dist output no step in
this job produced, so the suite failed to collect.

Build @cline/shared before the test, and install the full workspace: the
two-package filter did not provide enough of the tree for that build.

.github/workflows/ui-publish.yml

@@ -44,7 +44,7 @@ jobs:
           node-version: "24.x"
 
       - name: Install dependencies
-        run: bun install --filter @cline/ui --filter @cline/code --frozen-lockfile
+        run: bun install --frozen-lockfile
 
       - name: Typecheck UI
         run: bun -F @cline/ui typecheck
@@ -58,6 +58,11 @@ jobs:
       - name: Build UI package
         run: bun -F @cline/ui build
 
+      # The desktop chat test imports @cline/shared/browser, which resolves to
+      # dist output that nothing else in this job builds.
+      - name: Build shared package
+        run: bun -F @cline/shared build
+
       - name: Test desktop chat integration
         run: bun -F @cline/code test:chat-ui