feat: V1 prototype — Vite/React/TS tileset generator

- Scaffold: package.json, tsconfig.json, vite.config.ts, index.html
- src/lib/imageProcessor.ts: full pipeline (normalize, offset, seam repair, export, validation)
- src/components/UploadPanel.tsx: drag-and-drop, file picker, clipboard paste
- src/components/SettingsPanel.tsx: all controls per spec
- src/components/PreviewPanel.tsx: Original / Tileable / Repeated tabs
- src/components/ErrorBanner.tsx: dismissible error/warning banners
- src/App.tsx: root component wiring everything together
- src/index.css: dark premium glassmorphism theme w/ Inter font

node_modules/vite/client.d.ts

@@ -0,0 +1,279 @@
+/// <reference path="./types/importMeta.d.ts" />
+
+// CSS modules
+type CSSModuleClasses = { readonly [key: string]: string }
+
+declare module '*.module.css' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.scss' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.sass' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.less' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.styl' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.stylus' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.pcss' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+declare module '*.module.sss' {
+  const classes: CSSModuleClasses
+  export default classes
+}
+
+// CSS
+declare module '*.css' {}
+declare module '*.scss' {}
+declare module '*.sass' {}
+declare module '*.less' {}
+declare module '*.styl' {}
+declare module '*.stylus' {}
+declare module '*.pcss' {}
+declare module '*.sss' {}
+
+// Built-in asset types
+// see `src/node/constants.ts`
+
+// images
+declare module '*.apng' {
+  const src: string
+  export default src
+}
+declare module '*.bmp' {
+  const src: string
+  export default src
+}
+declare module '*.png' {
+  const src: string
+  export default src
+}
+declare module '*.jpg' {
+  const src: string
+  export default src
+}
+declare module '*.jpeg' {
+  const src: string
+  export default src
+}
+declare module '*.jfif' {
+  const src: string
+  export default src
+}
+declare module '*.pjpeg' {
+  const src: string
+  export default src
+}
+declare module '*.pjp' {
+  const src: string
+  export default src
+}
+declare module '*.gif' {
+  const src: string
+  export default src
+}
+declare module '*.svg' {
+  const src: string
+  export default src
+}
+declare module '*.ico' {
+  const src: string
+  export default src
+}
+declare module '*.webp' {
+  const src: string
+  export default src
+}
+declare module '*.avif' {
+  const src: string
+  export default src
+}
+declare module '*.cur' {
+  const src: string
+  export default src
+}
+declare module '*.jxl' {
+  const src: string
+  export default src
+}
+
+// media
+declare module '*.mp4' {
+  const src: string
+  export default src
+}
+declare module '*.webm' {
+  const src: string
+  export default src
+}
+declare module '*.ogg' {
+  const src: string
+  export default src
+}
+declare module '*.mp3' {
+  const src: string
+  export default src
+}
+declare module '*.wav' {
+  const src: string
+  export default src
+}
+declare module '*.flac' {
+  const src: string
+  export default src
+}
+declare module '*.aac' {
+  const src: string
+  export default src
+}
+declare module '*.opus' {
+  const src: string
+  export default src
+}
+declare module '*.mov' {
+  const src: string
+  export default src
+}
+declare module '*.m4a' {
+  const src: string
+  export default src
+}
+declare module '*.vtt' {
+  const src: string
+  export default src
+}
+
+// fonts
+declare module '*.woff' {
+  const src: string
+  export default src
+}
+declare module '*.woff2' {
+  const src: string
+  export default src
+}
+declare module '*.eot' {
+  const src: string
+  export default src
+}
+declare module '*.ttf' {
+  const src: string
+  export default src
+}
+declare module '*.otf' {
+  const src: string
+  export default src
+}
+
+// other
+declare module '*.webmanifest' {
+  const src: string
+  export default src
+}
+declare module '*.pdf' {
+  const src: string
+  export default src
+}
+declare module '*.txt' {
+  const src: string
+  export default src
+}
+
+// wasm?init
+declare module '*.wasm?init' {
+  const initWasm: (
+    options?: WebAssembly.Imports,
+  ) => Promise<WebAssembly.Instance>
+  export default initWasm
+}
+
+// web worker
+declare module '*?worker' {
+  const workerConstructor: {
+    new (options?: { name?: string }): Worker
+  }
+  export default workerConstructor
+}
+
+declare module '*?worker&inline' {
+  const workerConstructor: {
+    new (options?: { name?: string }): Worker
+  }
+  export default workerConstructor
+}
+
+declare module '*?worker&url' {
+  const src: string
+  export default src
+}
+
+declare module '*?sharedworker' {
+  const sharedWorkerConstructor: {
+    new (options?: { name?: string }): SharedWorker
+  }
+  export default sharedWorkerConstructor
+}
+
+declare module '*?sharedworker&inline' {
+  const sharedWorkerConstructor: {
+    new (options?: { name?: string }): SharedWorker
+  }
+  export default sharedWorkerConstructor
+}
+
+declare module '*?sharedworker&url' {
+  const src: string
+  export default src
+}
+
+declare module '*?raw' {
+  const src: string
+  export default src
+}
+
+declare module '*?url' {
+  const src: string
+  export default src
+}
+
+declare module '*?inline' {
+  const src: string
+  export default src
+}
+
+declare module '*?no-inline' {
+  const src: string
+  export default src
+}
+
+declare module '*?url&inline' {
+  const src: string
+  export default src
+}
+
+declare module '*?url&no-inline' {
+  const src: string
+  export default src
+}
+
+declare interface VitePreloadErrorEvent extends Event {
+  payload: Error
+}
+
+declare interface WindowEventMap {
+  'vite:preloadError': VitePreloadErrorEvent
+}