fix(constants): inline LIB_VERSION via codegen to fix compiled output (#1139)

## Description

`src/constants/resourceFetcher.ts` reads the library version with a
runtime `require('../../package.json').version`. That path resolves
correctly from `src/constants/`, but `react-native-builder-bob` emits
the file at `lib/module/constants/` — one level deeper — and babel
leaves the relative `require` literal unchanged. From the compiled
location it points at a non-existent `lib/package.json`, so any consumer
that resolves via `main`/`module` (web, Node) fails to bundle.
iOS/Android Metro is unaffected because the package's `"react-native":
"src/index"` entry reads source directly.

Replace the JSON `require` with a literal `LIB_VERSION` in
`constants/versions.ts`, derive the current-release tag from it, and
re-export `LIB_VERSION` from `resourceFetcher.ts` for existing callers.
While here, rename the version constants to match what they actually
mean at the call site: `VERSION_TAG` is now the current release (derived
from `LIB_VERSION`) and `PREVIOUS_VERSION_TAG` is the manual
previous-release string — kept manual because the previous release isn't
reliably derivable from `LIB_VERSION` across major bumps. All consumers
in `src/constants` are updated; hosted URLs are unchanged.

### Introduces a breaking change?

- [ ] Yes
- [x] No

### Type of change

- [x] Bug fix (change which fixes an issue)
- [ ] New feature (change which adds functionality)
- [ ] Documentation update (improves or adds clarity to existing
documentation)
- [ ] Other (chores, tests, code style improvements etc.)

### Tested on

- [x] iOS
- [x] Android

### Testing instructions

1. `yarn workspace react-native-executorch run prepare`.
2. Inspect
`packages/react-native-executorch/lib/module/constants/resourceFetcher.js`
— it should re-export `LIB_VERSION` from `./versions` with no
`require('../../package.json')` left.
3. `yarn typecheck` passes — covers the rename across `versions.ts`,
`modelUrls.ts`, `ocr/models.ts`, `tts/models.ts`, `tts/voices.ts`.
4. In a fresh Expo app with `react-native-web`, install the package from
this branch and run `npx expo start --web` — the bundler no longer
errors on the missing `lib/package.json`.
5. iOS/Android demo apps continue to build and report the expected
version. Exercise a model pinned to `PREVIOUS_VERSION_TAG` (e.g. any
Llama-3.2 / Qwen-3 / Whisper download) and one pinned to `VERSION_TAG`
(e.g. Qwen-3.5, YOLO26-pose, distiluse multilingual, privacy-filter) —
both should resolve to the same HuggingFace URLs as before the rename.

### Screenshots

### Related issues

Fixes #1138.

### Checklist

- [x] I have performed a self-review of my code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [x] My changes generate no new warnings

### Additional notes

`LIB_VERSION` is hardcoded next to the other version constants, so it
must be bumped manually alongside `package.json#version` (same release
step that already touches `PREVIOUS_VERSION_TAG`). `VERSION_TAG` is
derived from `LIB_VERSION`, so it updates automatically. A codegen
approach was considered but not adopted to keep the fix minimal.

---------

Co-authored-by: Mateusz Słuszniak <mateusz.sluszniak@swmansion.com>

Author: marnelram

packages/react-native-executorch/src/constants/modelUrls.ts

@@ -1,11 +1,11 @@
 import { alphabets, symbols } from './symbols';
 
-import { URL_PREFIX, VERSION_TAG } from '../versions';
+import { URL_PREFIX, PREVIOUS_VERSION_TAG } from '../versions';
 
-const DETECTOR_CRAFT_MODEL = `${URL_PREFIX}-detector-craft/${VERSION_TAG}/xnnpack_quantized/xnnpack_craft_quantized.pte`;
+const DETECTOR_CRAFT_MODEL = `${URL_PREFIX}-detector-craft/${PREVIOUS_VERSION_TAG}/xnnpack_quantized/xnnpack_craft_quantized.pte`;
 
 const createHFRecognizerDownloadUrl = (alphabet: keyof typeof alphabets) =>
-  `${URL_PREFIX}-recognizer-crnn.en/${VERSION_TAG}/xnnpack/${alphabet}/xnnpack_crnn_${alphabet}.pte`;
+  `${URL_PREFIX}-recognizer-crnn.en/${PREVIOUS_VERSION_TAG}/xnnpack/${alphabet}/xnnpack_crnn_${alphabet}.pte`;
 
 const RECOGNIZER_ENGLISH_CRNN = createHFRecognizerDownloadUrl('english');
 const RECOGNIZER_LATIN_CRNN = createHFRecognizerDownloadUrl('latin');

packages/react-native-executorch/src/constants/ocr/models.ts

@@ -1,4 +1,4 @@
+export { LIB_VERSION } from './versions';
+
 export const DOWNLOAD_EVENT_ENDPOINT =
   'https://ai.swmansion.com/telemetry/downloads/api/downloads';
-
-export const LIB_VERSION: string = require('../../package.json').version;

packages/react-native-executorch/src/constants/resourceFetcher.ts

@@ -1,7 +1,7 @@
-import { URL_PREFIX, VERSION_TAG } from '../versions';
+import { URL_PREFIX, PREVIOUS_VERSION_TAG } from '../versions';
 
 // Text to speech (tts) - Kokoro model(s)
-const KOKORO_EN_MODELS_ROOT = `${URL_PREFIX}-kokoro/${VERSION_TAG}/xnnpack`;
+const KOKORO_EN_MODELS_ROOT = `${URL_PREFIX}-kokoro/${PREVIOUS_VERSION_TAG}/xnnpack`;
 const KOKORO_EN_SMALL_MODELS_ROOT = `${KOKORO_EN_MODELS_ROOT}/small`;
 const KOKORO_EN_MEDIUM_MODELS_ROOT = `${KOKORO_EN_MODELS_ROOT}/medium`;
 

packages/react-native-executorch/src/constants/tts/models.ts

@@ -1,8 +1,8 @@
 import { KokoroVoiceExtras, VoiceConfig } from '../../types/tts';
-import { URL_PREFIX, VERSION_TAG } from '../versions';
+import { URL_PREFIX, PREVIOUS_VERSION_TAG } from '../versions';
 
 // Kokoro voices - phonemizers
-const KOKORO_PHONEMIZER_PREFIX = `${URL_PREFIX}-kokoro/${VERSION_TAG}/phonemizer`;
+const KOKORO_PHONEMIZER_PREFIX = `${URL_PREFIX}-kokoro/${PREVIOUS_VERSION_TAG}/phonemizer`;
 const KOKORO_PHONEMIZER_TAGGER_DATA = `${KOKORO_PHONEMIZER_PREFIX}/tags.json`;
 const KOKORO_PHONEMIZER_LEXICON_EN_US_DATA = `${KOKORO_PHONEMIZER_PREFIX}/us_merged.json`;
 const KOKORO_PHONEMIZER_LEXICON_EN_GB_DATA = `${KOKORO_PHONEMIZER_PREFIX}/gb_merged.json`;
@@ -17,7 +17,7 @@ const EN_GB_RESOURCES = {
 } as KokoroVoiceExtras;
 
 // Kokoro voices
-const KOKORO_VOICE_PREFIX = `${URL_PREFIX}-kokoro/${VERSION_TAG}/voices`;
+const KOKORO_VOICE_PREFIX = `${URL_PREFIX}-kokoro/${PREVIOUS_VERSION_TAG}/voices`;
 /**
  * @category TTS Supported Voices
  */

packages/react-native-executorch/src/constants/tts/voices.ts

@@ -1,4 +1,6 @@
+export const LIB_VERSION = '0.9.0';
+
 export const URL_PREFIX =
   'https://huggingface.co/software-mansion/react-native-executorch';
-export const VERSION_TAG = 'resolve/v0.8.0';
-export const NEXT_VERSION_TAG = 'resolve/v0.9.0';
+export const PREVIOUS_VERSION_TAG = 'resolve/v0.8.0';
+export const VERSION_TAG = `resolve/v${LIB_VERSION}`;