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## What Align Studio preview font handling with final render, and harden the transform hook against failures. ## Why Preview and render use different font handling. This bug changes text width and makes text layout look different between preview and final render. ## How - Add a `transformPreviewHtml` hook in `StudioApiAdapter` that adapters can implement to post-process preview HTML before Studio augments it - Use it in both the Vite adapter and the CLI studio server to inject the same deterministic `@font-face` rules that render uses - Wrap the hook in a try/catch so a failing transform (e.g. network error during Google Fonts fetch) degrades gracefully — the preview still loads with the original HTML ## Edge cases covered | Path | Covered | |------|---------| | Bundled HTML (adapter returns string) | ✓ | | Bundle returns null → reads index.html from disk | ✓ | | Bundle throws → catch-block fallback reads index.html | ✓ | | Sub-composition preview | ✓ | | Transform hook throws → graceful fallback to original HTML | ✓ | ## Test plan - [x] Unit tests added for all five paths above - [x] Manual testing performed Closes #797