fix(eval): degrade gracefully when a static asset import is missing

[posthog]

Problem

• A user loses the entire circuit render — schematic, PCB, everything — when a package is missing one optional 3D model or footprint file; one user had to fall back to an older project version to get anything to draw.
• .step, .obj, .stl, and .kicad_mod are already first-class extensions (lib/runner/resolveFilePath.ts, lib/shared/static-asset-extensions.ts). But when the asset is absent from the fsMap, resolution returns null and the import falls through to the fatal throw at lib/eval/import-eval-path.ts:344, so a missing 3D preview model kills the whole board.
• Only the 3D view should degrade. A 60-day project-wide query found 10+ distinct static-asset unresolved-import messages across several packages and users.

Changes

• Before the final throw in importEvalPath, check isStaticAssetPath(importName).
• On a match: log a warning (ctx.logger.info + console.warn) and register an empty default in preSuppliedImports, then return — the component renders without its asset.
• Keep the hard throw for source imports, which are a genuinely broken circuit.

Import type	Missing in fsMap — before	Missing in fsMap — after
Static asset (.step, .obj, .stl, .kicad_mod)	Throws → whole render dies	Warns, renders without the asset
Source file (.ts, .tsx, ...)	Throws	Throws (unchanged)

Test

• New test tests/features/static-file-imports/missing-static-file-import.test.ts: a board imports a missing .obj and still renders (resistor present).
• Verified it fails on main (throws Unresolved import) and passes with this change.
• bunx tsc --noEmit and biome format are clean.

Notes

• The report suggested also surfacing the skipped asset in the editor warning list. The eval runtime has no direct channel to that list; the console.warn plus logger entry are the surfacing available here. Wiring it into the editor UI belongs in the editor repo.
• The five single-occurrence error-tracking issues in the report are missing source files (bad input) and correctly keep throwing; they are out of scope.

Agent context

• Confirmed no open PR, branch, or issue touches these files.

---

Created with PostHog Desktop from this inbox report.