Initial commit: OmniSVG-Lite MVP before live-streaming work

- LM Studio client (httpx-based, OpenAI-compatible)
- SVG validator (lxml, whitelist tags, no <script>/<foreignObject>/http refs)
- PNG renderer (resvg-py primary, cairosvg fallback - no native cairo dep)
- History (SQLite, tracks raw/validated/preview paths)
- Gradio UI on 127.0.0.1:8788 with:
  * mode radio (icon/illustration)
  * n_candidates slider (default 1)
  * image upload for image-to-SVG
  * LM Studio URL/token inputs
  * model dropdown + refresh button
- prompts/ with system_icon.txt, system_illustration.txt, few_shot_examples.txt
- docs/spec.md, docs/design.md
- 122 unit/integration tests passing

requirements.txt

@@ -0,0 +1,12 @@
+gradio==5.37.0
+httpx>=0.27,<0.29
+lxml>=5.0,<7
+# PNG-рендер: resvg-py — self-contained, не требует cairo.dll;
+# cairosvg остаётся опциональным fallback, если cairo уже установлена
+resvg-py>=0.3.0
+cairosvg>=2.7.1
+Pillow>=10.0
+openai>=1.40
+
+# dev / test
+pytest>=8.0