Simplify CI: collapse each runner to a single nix-build step

Android: nix-build nix/ci.nix (builds all Linux attrs)
iOS: nix-build nix/ci.nix -A simulator-all -A ios-lib

Removes the separate build+run steps for emulator/simulator tests.

Tokens: ~2k

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

Author: jappeace-sloth

.github/workflows/ci.yaml

@@ -29,20 +29,7 @@ jobs:
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
           extra-substituters = https://nix-cache.jappie.me
           extra-trusted-public-keys = nix-cache.jappie.me:WjkKcvFtHih2i+n7bdsrJ3HuGboJiU2hA2CZbf9I9oc=
-    - run: nix-build nix/ci.nix -A native
-    - run: nix-build nix/ci.nix -A android
-    - run: nix-build nix/ci.nix -A consumer-link-test
-    - name: Build combined emulator test
-      run: nix-build nix/ci.nix -A emulator-all -o result-emulator-all
-    - name: Run combined emulator test (lifecycle + UI + buttons + scroll)
-      run: ./result-emulator-all/bin/test-all
-    - run: nix-build nix/ci.nix -A apk -o result-apk
-    - name: Upload Android APK
-      if: github.ref == 'refs/heads/master'
-      uses: actions/upload-artifact@v4
-      with:
-        name: haskell-mobile-android
-        path: result-apk/haskell-mobile.apk
+    - run: nix-build nix/ci.nix
     - name: Cancel workflow on failure
       if: failure()
       continue-on-error: true
@@ -67,19 +54,7 @@ jobs:
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
           extra-substituters = https://nix-cache.jappie.me
           extra-trusted-public-keys = nix-cache.jappie.me:WjkKcvFtHih2i+n7bdsrJ3HuGboJiU2hA2CZbf9I9oc=
-    - name: Build combined simulator test
-      run: nix-build nix/ci.nix -A simulator-all -o result-simulator-all
-    - name: Run combined simulator test (lifecycle + UI + buttons + scroll)
-      run: ./result-simulator-all/bin/test-all-ios
-    - run: nix-build nix/ci.nix -A ios-lib -o result-ios-lib
-    - name: Upload iOS library
-      if: github.ref == 'refs/heads/master'
-      uses: actions/upload-artifact@v4
-      with:
-        name: haskell-mobile-ios
-        path: |
-          result-ios-lib/lib/libHaskellMobile.a
-          result-ios-lib/include/HaskellMobile.h
+    - run: nix-build nix/ci.nix -A simulator-all -A ios-lib
     - name: Cancel workflow on failure
       if: failure()
       continue-on-error: true