Tests fixes, audit progress, UI completions

src/AirGap/__Tests/StellaOps.AirGap.Importer.Tests/AGENTS.md

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+# AirGap Importer Tests Guild Charter
+
+## Working Directory
+- `src/AirGap/__Tests/StellaOps.AirGap.Importer.Tests`
+
+## Scope
+- Unit and integration tests for AirGap Importer validation, quarantine, versioning, and reconciliation flows.
+- Deterministic fixtures for DSSE, TUF, SBOM parsing, and evidence graph outputs.
+- Offline-only inputs (no network, no external services).
+
+## Required Reading
+- `docs/README.md`
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/platform/architecture-overview.md`
+- `docs/airgap/importer-scaffold.md`
+- `docs/airgap/airgap-mode.md`
+
+## Working Agreements
+- Update task status in the sprint tracker and local `TASKS.md` for this directory.
+- Keep tests deterministic (fixed time, fixed IDs, stable ordering).
+- Prefer shared temp directory helpers and ensure cleanup.
+- Do not silently skip fixture-based tests; mark explicit skip when fixtures are missing.
+
+## Testing Rules
+- Use `Unit` vs `Integration` trait categories consistently.
+- Use WebApplicationFactory only when exercising HTTP endpoints.
+- Keep fixtures and golden files under this directory; no downloads.