fix(ios): target iPhone only (TARGETED_DEVICE_FAMILY=1)

App Store validation 90474: a universal (iPhone+iPad) build must support all
four interface orientations for iPad multitasking, but the app is portrait-only.
Targeting iPhone only drops that requirement.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: yyoyoian-pixel

ios/project.yml

@@ -41,6 +41,7 @@ targets:
         INFOPLIST_FILE: App/Info.plist
         CODE_SIGN_ENTITLEMENTS: App/MhrvVPN.entitlements
         ASSETCATALOG_COMPILER_APPICON_NAME: AppIcon
+        TARGETED_DEVICE_FAMILY: "1"
     dependencies:
       - target: MhrvTunnel
         embed: true
@@ -59,6 +60,7 @@ targets:
         PRODUCT_BUNDLE_IDENTIFIER: com.therealaleph.mhrv.tunnel
         INFOPLIST_FILE: NetworkExtension/Info.plist
         CODE_SIGN_ENTITLEMENTS: NetworkExtension/MhrvTunnel.entitlements
+        TARGETED_DEVICE_FAMILY: "1"
         # Link the Rust static lib.  Run scripts/build-ios.sh first.
         LIBRARY_SEARCH_PATHS: "$(PROJECT_DIR)/build/$(CONFIGURATION)"
         OTHER_LDFLAGS: "-lmhrv_rs"