Fix non-ASCII hyphens in docs

Replace U+2011 hyphens with ASCII '-' in 'CPU-bound' and 'CSP-safe' to avoid
text-processing issues and keep terminology searchable across tools. No code
changes; only documentation cleanup.

Author: PeterDaveHello

.github/copilot-instructions.md

@@ -25,13 +25,13 @@ Always reference these instructions first and fall back to search or bash comman
   - Default: threads enabled in dev/prod; workers = CPU cores
   - Set `BUILD_THREAD=0` to disable; set `BUILD_THREAD_WORKERS=<n>` to override worker count
 - BUILD_CACHE_COMPRESSION: Webpack filesystem cache compression
-  - Default: `0` (no compression) for faster warm builds on CPU‑bound SSD machines
+  - Default: `0` (no compression) for faster warm builds on CPU-bound SSD machines
   - Options: `0|false|none`, `gzip` (or `brotli` if explicitly desired)
   - Affects only `.cache/webpack` size/speed; does not change final artifacts
 - BUILD_WATCH_ONCE (dev): When set, `npm run dev` runs a single build and exits (useful for timing)
 - BUILD_POOL_TIMEOUT: Override thread-loader production pool timeout (ms)
   - Default: `2000`. Increase if workers recycle too aggressively on slow machines/CI
-- Source maps (dev): Dev builds emit external `.map` files next to JS bundles for CSP‑safe debugging; production builds disable source maps
+- Source maps (dev): Dev builds emit external `.map` files next to JS bundles for CSP-safe debugging; production builds disable source maps
 - Symlinks: Webpack uses `resolve.symlinks: false` to improve performance and ensure consistent module identity; if you rely on `npm link`/pnpm workspaces, temporarily enable symlink resolution while developing linked packages
 
 Performance defaults: esbuild handles JS/CSS minification. In development, CSS is injected via style-loader; in production, CSS is extracted via MiniCssExtractPlugin. Thread-loader is enabled by default in both dev and prod.