FE-1302: Promote the corrected Nullwire graph

[kostandinang]

Why

The reusable Nullwire and Wisp seeds predated graph corrections accepted while exercising and reviewing their retained specifications.

Nullwire exposed an unpinned test-runner failure and a deterministic integration race between two epics that both appended to README.md. Wisp's acceptance criteria had almost no executable oracle machinery, and its shared secure-terminal shell lacked a design anchor.

What

• Re-exports the reviewed Nullwire graph at LSN 5: 61 nodes / 143 edges.
  • Pins Vitest as the directly invoked verification runner.
  • Retains the successor execution harness used by all six scopes.
  • Serializes room lifecycle after the cryptographic envelope to prevent the observed shared-file integration conflict.
• Exports the reviewed Wisp refinement through LSN 8: 88 nodes / 210 edges.
  • Adds the injectable clock, dual request-capture surfaces, real-Web-Crypto suite, API/sentinel/accessibility/clipboard/state-contract methods, and executable checks for every acceptance criterion.
  • Adds the shared secure-terminal shell and interaction-state contract to the design plane.
  • Preserves superseded decisions while normalizing accepted graph items to the fixture loader's required explicit basis.
• Updates both fixture READMEs and records no package release impact.

How to test

1. npx tsx src/graph/validate-fixture.ts wisp-secure-drop/base
2. npx tsx src/graph/validate-fixture.ts nullwire/base
3. npx vitest --run src/graph/__tests__/export-fixtures.test.ts src/graph/__tests__/seed-fixtures.test.ts src/dev/__tests__/dev-cli.test.ts
4. npx changeset status --since=origin/next

Follow-up to #392 and FE-1302.

[kostandinang]

• FE-1302: Promote the corrected Nullwire graph #394 👈 (View in Graphite)
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