feat(cortex): Epic 1 - Reflex Arc (Layer 1) classifier

Implement fast local intent classification with escalation-aware logic.
Target: <20ms processing time for simple commands.

E1.S1 - Pattern Matching
- New reflex-classifier.ts with 7 intent types
- Top-2 match tracking for ambiguity detection
- Confidence thresholds (0.7) and ambiguity threshold (0.1)

E1.S2 - Escalation Triggers
- Multi-intent detection: "en", "daarna", "eerst", "vervolgens"
- Context-dependent pronouns: "hij", "zij", "hem", "haar", "zijn"
- Relative time expressions: "morgen", "overmorgen", "volgende week"

E1.S3 - Ambiguity Detection
- Top-2 score comparison (delta < 0.1 → escalate)
- secondBestIntent and secondBestConfidence tracking
- Low confidence escalation (< 0.7)

E1.S4 - Unit Tests
- 25 tests covering all scenarios
- Performance test: 100 classifications in <1ms
- Test runner: pnpm tsx (no Jest/Vitest setup required)

New files:
- lib/cortex/reflex-classifier.ts
- lib/cortex/__tests__/reflex-classifier.test.ts

Run tests: pnpm tsx lib/cortex/__tests__/reflex-classifier.test.ts

Progress: 14 SP / 48 SP (29%) - E0 + E1 complete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/cortex/index.ts

@@ -6,6 +6,7 @@ export * from './types';
 export * from './use-cortex-voice';
 export * from './intent-classifier';
 export * from './intent-classifier-ai';
+export * from './reflex-classifier';
 export * from './entity-extractor';
 export * from './date-time-parser';
 export * from './logger';