Tests fixes, audit progress, UI completions

src/__Tests/StellaOps.Audit.ReplayToken.Tests/AGENTS.md

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+# Audit ReplayToken Tests AGENTS
+
+## Purpose & Scope
+- Working directory: `src/__Tests/StellaOps.Audit.ReplayToken.Tests/`.
+- Roles: QA automation, backend engineer.
+- Focus: unit/security coverage for replay token generation, parsing, and expiration logic.
+
+## Required Reading (treat as read before DOING)
+- `docs/README.md`
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/platform/architecture-overview.md`
+- Relevant sprint files.
+
+## Working Agreements
+- Keep tests deterministic (fixed time providers, stable inputs).
+- Use explicit assertions for canonicalization and parsing behavior.
+- Avoid wall-clock dependencies for time-sensitive tests.
+- Update `docs/implplan/SPRINT_*.md` and local `TASKS.md` when starting or completing work.
+
+## Testing
+- Use xUnit + FluentAssertions + TestKit.
+- Include coverage for canonicalization ordering, expiration, and parsing edge cases.