- Updated snapcompact selectors and previews to pass `ShapeTarget` into `resolveShape` so `auto` is model-tuned.
- Applied `providerFrameBudget` in session compaction so generated archives stay within provider image caps.
- Replaced inline hard-coded image limits with `providerImageBudget` and skipped rasterization at cap.
- Added OpenRouter inline-transformer tests for cap exhaustion and existing-image budget exhaustion behavior.
- Added `SnapcompactShapePreview` (`snapcompact-shape-preview.ts`), rendering the highlighted shape variant over the sample text in `snapcompact-shape-preview-doc.md`; `auto` resolves to the active model's winning shape.
- Wired the preview as a footer component below the interactive rows in `settings-selector.ts`.
- Passed `modelApi`, `imageBudget`, and `requestRender` through `SelectorController` so the preview can rasterize against the session model and request repaints.
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