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## Summary Harden subgraph test coverage: remove low-value change-detector tests, consolidate fixtures, add behavioral coverage, and fix test infrastructure issues. Includes minor production code corrections discovered during test hardening. ## Changes - **What**: Comprehensive subgraph test suite overhaul across 6 phases - Removed change-detector tests and redundant assertions - Consolidated fixture helpers into `subgraphHelpers.ts` / `subgraphFixtures.ts` - Added Pinia initialization and fixture reset to all test files - Fixed barrel import violations (circular dependency prevention) - Added behavioral coverage for slot connections, events, edge cases - Added E2E helper and smoke test for subgraph promotion - Exported `SubgraphSlotBase` from litegraph barrel for test access - **Production code changes** (minor correctness fixes found during testing): - `resolveSubgraphInputLink.ts`: iterate forward (first-connected-wins) to match `_resolveLinkedPromotionBySubgraphInput` - `promotionSchema.ts`: return `[]` instead of throwing on invalid `proxyWidgets`; console.warn always (not DEV-only) - `LGraph.ts`: disconnect-after-veto ordering fix - `litegraph.ts`: barrel export swap for `SubgraphSlotBase` - **Stats**: 349 tests passing, 0 skipped across 26 test files ## Review Focus - Tests that merely asserted default property values were deleted (change detectors) - Fixture state is now reset via `resetSubgraphFixtureState()` in `beforeEach` - All imports use `@/lib/litegraph/src/litegraph` barrel to avoid circular deps - Production changes are small and directly motivated by test findings --------- Co-authored-by: Amp <amp@ampcode.com> Co-authored-by: bymyself <cbyrne@comfy.org>