ci: search the test directory from the chat list in the smoke test

The app is built with DIRECTORY_SERVICE_LINK set to the test directory's
short address (sed in the workflow). The smoke test types "ci seed", taps
"Search in Directory", accepts the first-search consent alert with "Search",
and expects the Directory results with #ci_group (Join group) and
#ci_channel (Join channel), retrying once if the search fails.

The steps now use scripts/ci/ios-sim/ui, which wraps AXe (tap by label or
value, type, wait, screenshot, compact accessibility tree) for scripts and
for an agent on the runner. Later steps get SIM_UDID and UI_OUT.

This run tests: the onboarding and typing steps on the new helper, the
consent alert, and the directory results in the app.

.github/workflows/ios-sim.yml

@@ -204,6 +204,13 @@ jobs:
         timeout-minutes: 30
         run: scripts/ci/ios-sim/backend.sh start ~/Downloads/${{ env.BACKEND_PKG }} "$RUNNER_TEMP/backend"
 
+      - name: Point the app at the test directory
+        run: |
+          link=$(cat "$RUNNER_TEMP/backend/directory-link")
+          file=apps/ios/Shared/Model/DirectorySearch.swift
+          sed -i '' "s|^let DIRECTORY_SERVICE_LINK = \".*\"$|let DIRECTORY_SERVICE_LINK = \"$link\"|" "$file"
+          grep -F "let DIRECTORY_SERVICE_LINK = \"$link\"" "$file"
+
       - name: Build app
         run: |
           xcodebuild build -quiet \