CI: tolerate missing Android i686 ABI; brew-first CocoaPods install

Android:
- monero_c prebuilt bundle doesn't ship i686-linux-android (32-bit x86
  Android — essentially extinct, sim/emulators use x86_64). Was failing
  loud on the missing target. Now: missing target = skip + log; only
  the truly-modern ABIs (arm64-v8a, x86_64) are REQUIRED. armeabi-v7a
  (32-bit ARM) is shipped if available but not required. The resulting
  APK is universal across whichever ABIs got staged.

iOS:
- 'sudo gem install cocoapods' was hitting a password prompt because
  the Gitea runner user has no passwordless sudo configured (rightly).
  Switched to brew-first install (Homebrew lives in its own prefix,
  no sudo needed on Mac). Falls back to 'gem install --user-install'
  (no sudo) if brew is somehow unavailable. The whole step is still
  no-op if 'pod' is already on PATH.

.github/workflows/build-android.yml

@@ -101,26 +101,50 @@ jobs:
           MONERO_C_TAG=$(cd scripts/monero_c && git describe --tags)
           BUNDLE_DIR="scripts/monero_c/release/$MONERO_C_TAG"
 
-          # monero_c target dir → Android ABI dir
+          # monero_c target dir → Android ABI dir. i686 (32-bit x86) is
+          # essentially dead on real Android devices; the monero_c bundle
+          # doesn't ship it. Missing target = log + skip, not fatal. The
+          # required modern ABIs (arm64-v8a, x86_64) MUST exist or we fail.
           declare -A ABI_MAP=(
             [aarch64-linux-android]=arm64-v8a
             [armv7a-linux-androideabi]=armeabi-v7a
             [i686-linux-android]=x86
             [x86_64-linux-android]=x86_64
           )
+          REQUIRED_ABIS=(arm64-v8a x86_64)
 
+          declare -A FOUND_ABI
           for target in "${!ABI_MAP[@]}"; do
             abi="${ABI_MAP[$target]}"
+            if [[ ! -d "$BUNDLE_DIR/$target" ]]; then
+              echo "SKIP: $target not in bundle (Android ABI $abi will not be shipped)"
+              continue
+            fi
             mkdir -p "android/app/src/main/jniLibs/$abi"
+            ok=true
             for coin in monero wownero; do
               src="$BUNDLE_DIR/$target/lib${coin}_wallet2_api_c.so"
               if [[ -f "$src" ]]; then
                 cp -v "$src" "android/app/src/main/jniLibs/$abi/"
               else
-                echo "MISSING: $src — fail loud, the bundle layout may have changed"
-                exit 1
+                echo "SKIP: $src missing (skipping $abi)"
+                ok=false
+                break
               fi
             done
+            if $ok; then
+              FOUND_ABI[$abi]=1
+            else
+              rm -rf "android/app/src/main/jniLibs/$abi"
+            fi
+          done
+
+          # Fail loudly only if a required ABI is missing.
+          for required in "${REQUIRED_ABIS[@]}"; do
+            if [[ -z "${FOUND_ABI[$required]:-}" ]]; then
+              echo "FATAL: required ABI $required is missing — monero_c bundle layout has changed"
+              exit 1
+            fi
           done
 
           echo "=== jniLibs contents ==="

.github/workflows/build-ios-sim.yml

@@ -58,8 +58,20 @@ jobs:
 
       - name: Install CocoaPods (if missing)
         run: |
-          if ! command -v pod >/dev/null; then
-            sudo gem install cocoapods --no-document
+          if command -v pod >/dev/null; then
+            pod --version
+            exit 0
+          fi
+          # Prefer Homebrew on macOS — no sudo, installs into its own prefix.
+          if command -v brew >/dev/null; then
+            brew install cocoapods
+          else
+            # Fallback: user-local gem install (no sudo).
+            export GEM_HOME="$HOME/.gem"
+            export PATH="$GEM_HOME/bin:$PATH"
+            echo "GEM_HOME=$HOME/.gem" >> "$GITHUB_ENV"
+            echo "$HOME/.gem/bin" >> "$GITHUB_PATH"
+            gem install --user-install cocoapods --no-document
           fi
           pod --version
 

.github/workflows/build-ios-testflight.yml

@@ -61,8 +61,18 @@ jobs:
 
       - name: Install CocoaPods (if missing)
         run: |
-          if ! command -v pod >/dev/null; then
-            sudo gem install cocoapods --no-document
+          if command -v pod >/dev/null; then
+            pod --version
+            exit 0
+          fi
+          if command -v brew >/dev/null; then
+            brew install cocoapods
+          else
+            export GEM_HOME="$HOME/.gem"
+            export PATH="$GEM_HOME/bin:$PATH"
+            echo "GEM_HOME=$HOME/.gem" >> "$GITHUB_ENV"
+            echo "$HOME/.gem/bin" >> "$GITHUB_PATH"
+            gem install --user-install cocoapods --no-document
           fi
           pod --version