fix(ios,macos): address PR #26 review findings

- ios/Runner.xcodeproj/project.pbxproj: Update RunnerTests TEST_HOST
  paths from Runner.app/Runner to Chanora.app/Chanora (target was
  renamed in prior commit but test config still pointed at old paths,
  breaking xcodebuild test).
- Cargo.toml: Move release DWARF flags from workspace [profile.release]
  into Apple-only podspec CARGO_PROFILE_RELEASE_* env vars so Android,
  Linux, Windows release builds stay lean (~10MB DWARF avoided).
- ios/Runner/Info.plist + macos/Runner/Info.plist: Flip
  ITSAppUsesNonExemptEncryption from false to true (Chanora ships
  ChaCha20-Poly1305 local storage + tsclientlib ECDH/AES-EAX voice
  channel encryption, not exempt under Apple export-compliance rules).
- scripts/verify_silero_exports.sh: Make slice-aware via lipo -archs
  loop + per-arch nm -arch invocation so universal macOS builds
  verify every architecture slice, not just whichever slice nm picks.
- .gitignore: Drop .omo/ and .playwright-mcp/ entries (scope leak;
  unrelated tooling state, not part of PR #26 archive-symbol concern).

apps/chanora_flutter/scripts/verify_silero_exports.sh

@@ -2,20 +2,23 @@
 # verify_silero_exports.sh
 #
 # Asserts that all six chanora_silero_vad_* C symbols that the Rust
-# chanora_bridge framework resolves via dlsym(RTLD_DEFAULT) are
-# present in the linked app binary's dynamic export table.
+# chanora_bridge framework resolves via dlsym(RTLD_DEFAULT) are present
+# in the linked app binary's dynamic export table — verified per
+# architecture slice for macOS universal builds, because `nm` on a
+# universal Mach-O without -arch will succeed if a symbol exists in ANY
+# slice, not every slice. A missing symbol in just the x86_64 slice
+# would silently break Intel Macs.
 #
-# Without this check, Xcode Archive's -dead_strip can silently
-# remove these Swift @_cdecl symbols because no Swift caller exists,
-# and CoreML VAD falls back to WebRTC on TestFlight/App Store with
-# no compile-time, link-time, or runtime warning. We hit that bug
-# once; this script ensures we never ship it again.
+# Without this check, Xcode Archive's -dead_strip can remove these
+# Swift @_cdecl symbols (no Swift caller exists) and CoreML VAD falls
+# back to WebRTC on TestFlight/App Store with no compile-time,
+# link-time, or runtime warning. We hit that bug once; this script
+# ensures we never ship it again.
 #
 # Runs as an Xcode build phase after Link Binary, on iOS and macOS.
 
 set -e
 
-# Xcode passes these. Outside Xcode, the caller must export them.
 if [ -z "${TARGET_BUILD_DIR}" ] || [ -z "${EXECUTABLE_PATH}" ]; then
     echo "error: verify_silero_exports.sh requires TARGET_BUILD_DIR and EXECUTABLE_PATH (run from Xcode build phase)" >&2
     exit 1
@@ -37,20 +40,40 @@ _chanora_silero_vad_last_error
 _chanora_silero_vad_free_string
 "
 
-EXPORTED=$(xcrun nm -gU "${BINARY}" 2>/dev/null | awk '{print $NF}')
+# Enumerate slices. `lipo -archs` prints arches space-separated for
+# universal Mach-O; for thin binaries it prints the single arch.
+ARCHS=$(xcrun lipo -archs "${BINARY}" 2>/dev/null || echo "")
+if [ -z "${ARCHS}" ]; then
+    echo "error: xcrun lipo -archs failed for ${BINARY}; cannot enumerate slices" >&2
+    exit 1
+fi
 
-MISSING=""
-for sym in ${REQUIRED_SYMBOLS}; do
-    if ! echo "${EXPORTED}" | grep -qx "${sym}"; then
-        MISSING="${MISSING} ${sym}"
+FAILED=0
+for arch in ${ARCHS}; do
+    EXPORTED=$(xcrun nm -arch "${arch}" -gU "${BINARY}" 2>/dev/null | awk '{print $NF}')
+    if [ -z "${EXPORTED}" ]; then
+        echo "error: xcrun nm produced no output for arch=${arch} on ${BINARY}" >&2
+        FAILED=1
+        continue
+    fi
+
+    MISSING=""
+    for sym in ${REQUIRED_SYMBOLS}; do
+        if ! echo "${EXPORTED}" | grep -qx "${sym}"; then
+            MISSING="${MISSING} ${sym}"
+        fi
+    done
+
+    if [ -n "${MISSING}" ]; then
+        echo "error: chanora_silero_vad exports missing from $(basename "${BINARY}") [arch=${arch}]:${MISSING}" >&2
+        FAILED=1
     fi
 done
 
-if [ -n "${MISSING}" ]; then
-    echo "error: chanora_silero_vad exports missing from $(basename "${BINARY}"):${MISSING}" >&2
+if [ "${FAILED}" -ne 0 ]; then
     echo "error: Rust dlsym(RTLD_DEFAULT) resolution will fail and CoreML VAD will fall back to WebRTC." >&2
     echo "error: Check OTHER_LDFLAGS -exported_symbol entries in Flutter/*.xcconfig and the @_cdecl exports in Runner/SileroCoreMLBridge.swift." >&2
     exit 1
 fi
 
-echo "verify_silero_exports: all 6 chanora_silero_vad_* symbols present in $(basename "${BINARY}")"
+echo "verify_silero_exports: all 6 chanora_silero_vad_* symbols present in $(basename "${BINARY}") [arches: ${ARCHS}]"