feat(FN-2263): merge fusion/fn-2263 (auto-resolved)

- docs(FN-2263): update README with scaffolded scope and deferral documentation
- test(FN-2263): verify hermes runtime plugin build and tests
- feat(FN-2263): implement plugin entrypoint with runtime registration shell
- feat(FN-2263): scaffold Hermes runtime plugin package
- test(FN-2256): add mocks for createResolvedAgentSession in tests
- docs(FN-2256): update architecture docs and add changeset
- fix(FN-2256): fix lint errors and TypeScript issues
- feat(FN-2256): add runtime selection regression tests — Step 4
- feat(FN-2256): route engine session creation through runtime resolver — Step 3
- feat(FN-2256): extend PluginRunner runtime lookup surface — Step 2
- feat(FN-2256): add runtime abstraction and resolver — Step 1

packages/dashboard/app/components/DevServerView.tsx

@@ -409,7 +409,6 @@ export function DevServerView({ addToast, projectId }: DevServerViewProps) {
     }
 
     const fallbackCwd = normalizeSourceToCwd(selectedSource) ?? ".";
-    const scriptName = selectedCandidate?.scriptName ?? selectedScript ?? "custom";
     const cwd = selectedCandidate?.cwd ?? fallbackCwd;
 
     void runAction(