fix: restore inline diagram controls and synchronize portal theme

README.md

@@ -31,6 +31,10 @@ Top-level sections are Organization, Strategy, and Contribution, each with an in
 
 Archify 3.0.1 is vendored under `vendor/archify/` from commit `d5a1333d7447c866a765adac7d4d062f2f02e4d2`. MIT and third-party notices are preserved. `diagrams/` holds editable JSON; `pnpm diagrams:build` validates and generates local standalone viewers before every site build. The iframe is sandboxed without same-origin permission. See `docs/contribution/diagrams.md` for capability analysis, authoring, boundaries, and upgrade procedure.
 
+The build checks upstream provenance before applying the portal integration: `scripts/inline-viewer.css` restores compact embed controls, two guarded preset restrictions are removed from generated viewers only, and `scripts/viewer-theme-bridge.js` synchronizes theme with the portal through source-validated messages. Vendor files remain unchanged. Delivery receipts describe the upstream artifact before this integration, not the final served bytes. Theme changes do not reload viewers or discard visual presets. PNG, JPEG, WebP and SVG downloads remain available; browser-dependent exports stay disabled when unsupported.
+
+For interaction acceptance, serve the production build on port 4173 and run `pnpm test:browser` with an installed Playwright Chromium (or `PLAYWRIGHT_CHROMIUM_EXECUTABLE`). This checks story layouts, portal/diagram theme synchronization, all four presets, actual exported artifact decoding, route changes, and fullscreen click/Escape/focus behavior at desktop and mobile widths. Screenshots, downloads and results are saved under ignored `.cache/` directories.
+
 ## Design
 
 Inspired by https://www.eldorado.gg/: Lato, near-black navigation, charcoal, gold `#ffc950`, light panels, bold headings. Original documentation artwork and square panels; no official marketplace assets or business claims. See `docs/core/reference.md`.