Re-add emulator/simulator run steps after build

Android: nix-build ci.nix, then nix-build -A emulator-all -o result && run
iOS: nix-build -A simulator-all -A ios-lib, then nix-build -A simulator-all -o result && run
The second nix-build is instant since the store entry is already cached.

Tokens: ~2k

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jappeace-sloth

.github/workflows/ci.yaml

@@ -30,6 +30,8 @@ jobs:
           extra-substituters = https://nix-cache.jappie.me
           extra-trusted-public-keys = nix-cache.jappie.me:WjkKcvFtHih2i+n7bdsrJ3HuGboJiU2hA2CZbf9I9oc=
     - run: nix-build nix/ci.nix
+    - name: Run combined emulator test (lifecycle + UI + buttons + scroll)
+      run: nix-build nix/ci.nix -A emulator-all -o result-emulator-all && ./result-emulator-all/bin/test-all
     - name: Cancel workflow on failure
       if: failure()
       continue-on-error: true
@@ -55,6 +57,8 @@ jobs:
           extra-substituters = https://nix-cache.jappie.me
           extra-trusted-public-keys = nix-cache.jappie.me:WjkKcvFtHih2i+n7bdsrJ3HuGboJiU2hA2CZbf9I9oc=
     - run: nix-build nix/ci.nix -A simulator-all -A ios-lib
+    - name: Run combined simulator test (lifecycle + UI + buttons + scroll)
+      run: nix-build nix/ci.nix -A simulator-all -o result-simulator-all && ./result-simulator-all/bin/test-all-ios
     - name: Cancel workflow on failure
       if: failure()
       continue-on-error: true