ci: restore the desktop Claude search test

With the test backend, the Claude job builds the app against the test directory, sets it up at the chat list and gives Claude the online search test; without it, the onboarding path stays.

.github/workflows/desktop-linux.yml

@@ -411,6 +411,14 @@ jobs:
         timeout-minutes: 30
         run: scripts/ci/desktop-linux/backend.sh start ~/backend/${{ env.BACKEND_PKG }} "$RUNNER_TEMP/backend"
 
+      - name: Point the app at the test directory
+        if: needs.plan.outputs.run-backend == 'true'
+        run: |
+          link=$(cat "$RUNNER_TEMP/backend/directory-link")
+          file=apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/DirectorySearch.kt
+          sed -i "s|^const val DIRECTORY_SERVICE_LINK = \".*\"$|const val DIRECTORY_SERVICE_LINK = \"$link\"|" "$file"
+          grep -F "const val DIRECTORY_SERVICE_LINK = \"$link\"" "$file"
+
       - name: Setup Java
         uses: actions/setup-java@v5
         with:
@@ -431,7 +439,14 @@ jobs:
           sudo chmod +x /usr/local/bin/ui
 
       - name: Start the app
-        run: scripts/ci/desktop-linux/smoke-test.sh apps/multiplatform/release/main/app/simplex "$RUNNER_TEMP/claude-test/screens" start
+        env:
+          BACKEND: ${{ needs.plan.outputs.run-backend }}
+        run: |
+          if [ "$BACKEND" = true ]; then
+            export NAMES_SERVER=$(cat "$RUNNER_TEMP/backend/names-server")
+            cases=setup
+          fi
+          scripts/ci/desktop-linux/smoke-test.sh apps/multiplatform/release/main/app/simplex "$RUNNER_TEMP/claude-test/screens" ${cases:-start}
 
       # Claude's Bash is limited to single ui commands by the guard hook in claude-test.sh. Claude Code's credential
       # scrub stays off: on Linux it forces its whole Bash sandbox (bubblewrap, socat), which ui isn't set up for.
@@ -440,7 +455,8 @@ jobs:
         env:
           CLAUDE_CODE_OAUTH_TOKEN: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC: 1
-        run: scripts/ci/desktop-linux/claude-test.sh "$RUNNER_TEMP/claude-test" "$RUNNER_TEMP/claude-transcript.jsonl"
+          TEST_PROMPT: scripts/ci/desktop-linux/${{ needs.plan.outputs.run-backend == 'true' && 'claude-search.md' || 'claude-test.md' }}
+        run: scripts/ci/desktop-linux/claude-test.sh "$RUNNER_TEMP/claude-test" "$RUNNER_TEMP/claude-transcript.jsonl" "$TEST_PROMPT"
 
       - name: Report Claude usage
         if: ${{ !cancelled() && steps.claude.outcome != 'skipped' }}