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The shimmer progress renderer writes from a worker thread via `fs.writeSync(1, ...)` to keep the animation smooth while the main thread is busy in SQLite. That path bypasses Node's TTY-aware UTF-8->codepage conversion on Windows, so glyphs like `|`/`<>`/`-` were emitted as raw UTF-8 bytes and reinterpreted by the console's OEM codepage (CP437, CP936, ...), producing strings like `鋍?[0m 鉒?[0m Scanning files 鈥?N found`. Add `src/ui/glyphs.ts` with `supportsUnicode()` detection plus matched Unicode + ASCII glyph sets, and route all CLI/shimmer output through `getGlyphs()`. Defaults: ASCII on Windows and on Linux kernel consoles (`TERM=linux`), Unicode everywhere else. `CODEGRAPH_UNICODE=1` and `CODEGRAPH_ASCII=1` are escape hatches. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>