camera podspec: mirror darwin/Camera on every build, not just pod install

`prepare_command` runs only on `pod install`. Mid-iteration Swift
edits to `darwin/Camera/*.swift` would never reach the built binary
until the user ran pod install or cleaned the Pods dir — confusing
during debugging (NSLog/diag additions silently absent from the
running app).

Add a `script_phases` build phase to both podspecs that rsyncs
darwin/Camera into Classes/Camera-shared before each compile. The
existing `prepare_command` stays as the install-time primer that
gives CocoaPods the initial file set to glob; the build phase keeps
contents fresh on every Swift edit thereafter. Verified: the resulting
binary now contains the NSLog strings that the prior build was
missing.

(Adding new files to darwin/Camera/ still requires pod install so
CocoaPods' source_files glob picks them up — script_phases only
refreshes content of files CocoaPods already knows about.)

ios/ux.podspec

@@ -9,9 +9,26 @@ Pod::Spec.new do |s|
   # Mirror the shared `darwin/Camera/` Swift files into a local
   # `Classes/Camera-shared/` so CocoaPods picks them up via the
   # normal glob — neither symlinks nor `../` escapes work
-  # (Pathname.glob bails on both). The mirror runs on every
-  # `pod install`; the destination is `.gitignore`'d.
+  # (Pathname.glob bails on both).
+  #
+  # `prepare_command` only runs on `pod install`. Swift edits in
+  # `darwin/Camera/` between installs would never reach the built
+  # binary — the mirror would be stale. The build script phase
+  # below re-runs the mirror before each compile to keep contents
+  # fresh.
   s.prepare_command  = 'rm -rf Classes/Camera-shared && cp -R ../darwin/Camera Classes/Camera-shared'
+  s.script_phases    = [{
+    :name             => 'Mirror darwin/Camera',
+    :execution_position => :before_compile,
+    :script           => <<-CMD
+set -e
+SRC="${PODS_TARGET_SRCROOT}/../darwin/Camera"
+DEST="${PODS_TARGET_SRCROOT}/Classes/Camera-shared"
+[ -d "$SRC" ] || exit 0
+mkdir -p "$DEST"
+rsync -a --delete "$SRC/" "$DEST/"
+CMD
+  }]
   s.source_files     = 'Classes/**/*.swift'
   s.frameworks       = ['AVFoundation', 'CoreMedia', 'CoreVideo', 'Photos', 'PhotosUI']
   s.dependency 'Flutter'

macos/ux.podspec

@@ -6,10 +6,27 @@ Pod::Spec.new do |s|
   s.license          = { :file => '../LICENSE' }
   s.author           = { 'Swipelab' => 'hello@swipelab.co' }
   s.source           = { :path => '.' }
-  # See the matching note in `ios/ux.podspec` — mirror the shared
-  # `darwin/Camera/` Swift files into a local `Classes/Camera-shared/`
-  # at install time so CocoaPods picks them up via the normal glob.
+  # `Classes/Camera-shared/` mirrors the shared `darwin/Camera/`
+  # Swift files. `prepare_command` runs only on `pod install`, so
+  # mid-iteration edits to darwin/Camera/*.swift wouldn't reach the
+  # built binary until pods were re-installed. Run the mirror as a
+  # build script phase too (before compile) so the latest source is
+  # always picked up. The two are belt-and-suspenders — pod install
+  # primes the file set so CocoaPods globs it; the build phase keeps
+  # contents fresh on every subsequent Swift change.
   s.prepare_command  = 'rm -rf Classes/Camera-shared && cp -R ../darwin/Camera Classes/Camera-shared'
+  s.script_phases    = [{
+    :name             => 'Mirror darwin/Camera',
+    :execution_position => :before_compile,
+    :script           => <<-CMD
+set -e
+SRC="${PODS_TARGET_SRCROOT}/../darwin/Camera"
+DEST="${PODS_TARGET_SRCROOT}/Classes/Camera-shared"
+[ -d "$SRC" ] || exit 0
+mkdir -p "$DEST"
+rsync -a --delete "$SRC/" "$DEST/"
+CMD
+  }]
   s.source_files     = 'Classes/**/*.swift'
   s.frameworks       = ['AVFoundation', 'CoreMedia', 'CoreVideo']
   s.dependency 'FlutterMacOS'