fix: export ControlledSchematicViewer from the package entry point

[Priyanshubhartistm]

Summary

• ControlledSchematicViewer wraps SchematicViewer and manages editEvents/onEditEvent for you — it's the pattern 7 of the example fixtures use for drag-to-edit, and it's referenced in docs/dragndrop-spec.md.
• Added export { ControlledSchematicViewer } from "./components/ControlledSchematicViewer" to lib/index.ts.
• Updated the 7 fixtures that previously deep-imported it from lib/components/ControlledSchematicViewer to import from lib/index instead, so the examples now demonstrate the actual public API.
• Added tests/lib-index-exports.test.ts to lock in the package's export surface so this can't silently regress again.

Why

ControlledSchematicViewer was never added to lib/index.ts, so consumers of the published @tscircuit/schematic-viewer package had no way to import it only Cosmos's lib/* path alias made the examples work, and that alias doesn't exist in dist/.

Impact

Consumers of @tscircuit/schematic-viewer can now import ControlledSchematicViewer directly, matching the pattern every relevant example and the drag-and-drop docs already show as the intended usage.

Validation

• bun run format:check
• bunx tsc --noEmit
• bun test (6 pass, 0 fail)
• Verified visually in Cosmos: ran bun run start, drove example1, example4, example5, and example14 with Playwright after switching their imports to lib/index — all render correctly, zero page errors.

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Project	Deployment	Actions	Updated (UTC)
schematic-viewer	Ready	Preview	Aug 15, 2026 5:17pm