fix(tts): make LuxTTS resources signable on iOS

Package.swift

@@ -29,7 +29,8 @@ let package = Package(
             ],
             path: "Sources/FluidAudio",
             resources: [
-                .copy("TTS/LuxTts/G2p/Resources")
+                // Keep .process: .copy of a Resources-named directory breaks Apple code signing on iOS.
+                .process("TTS/LuxTts/G2p/Resources")
             ]
         ),
         // Byte-exact NeMo text normalization (FST engine, all 7 languages).
@@ -66,7 +67,7 @@ let package = Package(
                 "FluidAudioCLI",
             ],
             resources: [
-                .copy("TTS/LuxTts/Resources")
+                .process("TTS/LuxTts/Resources")
             ]
         ),
     ],

Sources/FluidAudio/TTS/LuxTts/G2p/LuxTtsG2p.swift

@@ -77,11 +77,9 @@ public struct LuxTtsG2p: Sendable {
     public init() throws {
         guard
             let lexiconURL = Bundle.module.url(
-                forResource: "luxtts_en_us_lexicon.tsv", withExtension: "zz",
-                subdirectory: "Resources"),
+                forResource: "luxtts_en_us_lexicon.tsv", withExtension: "zz"),
             let auxURL = Bundle.module.url(
-                forResource: "luxtts_en_us_g2p_aux", withExtension: "json",
-                subdirectory: "Resources")
+                forResource: "luxtts_en_us_g2p_aux", withExtension: "json")
         else {
             throw LuxTtsError.tokenizerFailed("bundled G2P resources missing")
         }

Tests/FluidAudioTests/TTS/LuxTts/LuxTtsFixtures.swift

@@ -120,10 +120,7 @@ struct LuxTtsFixtures: Decodable {
     // MARK: - Loading
 
     static func resourceURL(_ name: String) throws -> URL {
-        guard
-            let url = Bundle.module.url(
-                forResource: name, withExtension: nil, subdirectory: "Resources")
-        else {
+        guard let url = Bundle.module.url(forResource: name, withExtension: nil) else {
             throw XCTSkip("LuxTts fixture resource missing: \(name)")
         }
         return url

Tests/FluidAudioTests/TTS/LuxTts/LuxTtsG2pTests.swift

@@ -12,6 +12,21 @@ import XCTest
 /// the mobius worktree; these tests pin representative behaviors.
 final class LuxTtsG2pTests: XCTestCase {
 
+    func testFixtureResourcesAreProcessedAtBundleRoot() {
+        XCTAssertFalse(
+            FileManager.default.fileExists(
+                atPath: Bundle.module.bundleURL
+                    .appendingPathComponent("Resources", isDirectory: true).path
+            ),
+            "LuxTTS test resources must not create a reserved top-level Resources directory"
+        )
+        XCTAssertTrue(
+            FileManager.default.fileExists(
+                atPath: Bundle.module.bundleURL.appendingPathComponent("luxtts_fixtures.json").path
+            )
+        )
+    }
+
     private static let g2p: LuxTtsG2p = {
         do {
             return try LuxTtsG2p()