test: delete tests of dead eval code (A)

- A1: the retired Eng lexical oracle (evaluateEngSeedCoverage,
  isEngSeedDecisionAUQ), the completion-handoff detector and the retained
  corpus had no paid caller since v1.87.6; delete their 26 replay files,
  ~2.6k helper LOC and fixtures, and the dead blocks in 8 mixed files
  (live hasNativePlanTerminal / batching assertions stay).
- A2: dead viewport approvers in autoplan-artifact-permission and their 11
  replay files + fixtures; recorder/launcher cases stay.
- A3: never-wired oracles and seeders (autoplan-phase-order,
  eng-finding-fixture, ceo-paired-fixture, design-ui-scope,
  plan-skill-completion, pty-current-screen, required-reads,
  transcript-section-logger); plan-seed-submission now decodes through the
  production createPtyScreen; section manifests name their actual guard.
- A4: zero-reference helper exports, plus execGit and invokeAndObserve
  found by the reachability pass.
- 52 fixtures orphaned by the deletions; touchfile and selection-table
  entries for every deleted path.

test/autoplan-phase-handoff.test.ts

@@ -8,7 +8,6 @@ import { initializePlan, prepareMethodology, createSnapshot, amendImplementation
 import { autoplanPhaseCompletions } from './helpers/autoplan-phase-observer';
 import { auditAutoplanMethodReads, loadAutoplanMethodologyBinding } from './helpers/autoplan-method-read-audit';
 import { readPlanCountTranscript, type NativePublicToolEvent } from './helpers/plan-count-transcript';
-import { readPlanSkillCompletion } from './helpers/plan-skill-completion';
 import captured from './fixtures/autoplan-phase-handoff-6714.json';
 
 const ROOT = resolve(import.meta.dir, '..');
@@ -197,7 +196,6 @@ test('captured parent text and a following tool can share a response without end
   expect(result.hits.map(hit => hit.phase)).toEqual(phases);
   expect(result.tools).toHaveLength(4);
   expect(result.hits.every((hit, index) => hit.ts < Date.parse(result.tools[index]!.timestamp))).toBe(true);
-  expect(readPlanSkillCompletion(root, textEnvelope!.sessionId, 'Phase 3 complete.')).toBeNull();
   // Tool arguments, tool results and sidechain text are not parent announcements.
   expect(read([{ ...rows[1], message: { ...rows[1]!.message, content: [{ type: 'tool_use', id: 'source',
     name: 'Bash', input: { command: 'echo "Phase 1 complete."' } }] } }]).hits).toEqual([]);