refactor: rename swift → cortex in code and documentation

Complete rename of "swift" terminology to "cortex" across the codebase:

Code Changes:
- Rename directories: lib/swift → lib/cortex, components/swift → components/cortex
- Rename API routes: /api/swift/* → /api/cortex/*
- Rename page routes: /epd/swift → /epd/cortex
- Rename store: swift-store.ts → cortex-store.ts

Type Renames:
- SwiftIntent → CortexIntent
- SwiftStore → CortexStore
- useSwiftStore → useCortexStore
- SwiftContext → CortexContext
- useSwiftVoice → useCortexVoice

Documentation Updates (docs/intent/):
- Safety Net → Nudge (Layer 3 rename)
- SafetySuggestion → NudgeSuggestion
- evaluateSafetyNet → evaluateNudge
- SWIFT_* feature flags → CORTEX_*
- All path references updated to match new structure

Files affected: 47 files, ~700 lines changed

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

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

docs/intent/intent-architecture-v2-proposal.md

@@ -36,7 +36,7 @@ We vervangen de simpele `Classifier` door een slimmere `Cortex`.
 *   **Nieuwe capability: Entity Disambiguation.**
     *   Snap dat "Jan" verwijst naar de patiënt die ik *vandaaag* in mijn agenda heb.
 
-### Layer 3: The Safety Net (Contextual Logic)
+### Layer 3: The Nudge (Contextual Logic)
 *   **Wat:** Een business logic laag die *na* de intent draait.
 *   **Functie:** Proactive Suggestions.
     *   *Trigger:* Intent `CreateWoundCareNote` 'completed'.
@@ -81,6 +81,6 @@ graph TD
     Plan --> Action1["Action A"]
     Plan --> Action2["Action B"]
     
-    Action1 --> Safety["Layer 3: Safety Net"]
+    Action1 --> Safety["Layer 3: Nudge"]
     Safety -->|Trigger Found| Suggestion["Suggest Follow-up"]
 ```