feat(intelligence): add self-evolution UI for identity change proposals

P1.1: Identity Change Proposal UI
- Create IdentityChangeProposal.tsx with diff view for SOUL.md changes
- Add approve/reject buttons with visual feedback
- Show evolution history timeline with restore capability

P1.2: Connect Reflection Engine to Identity Proposals
- Update ReflectionLog.tsx to convert reflection proposals to identity proposals
- Add ReflectionIdentityProposal type for non-persisted proposals
- Auto-create identity proposals when reflection detects personality changes

P1.3: Evolution History and Rollback
- Display identity snapshots with timestamps
- One-click restore to previous personality versions
- Visual diff between current and proposed content

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/lib/intelligence-backend.ts

@@ -146,10 +146,19 @@ export interface ImprovementSuggestion {
   priority: 'high' | 'medium' | 'low';
 }
 
+// Reflection identity proposal (from reflection engine, not yet persisted)
+export interface ReflectionIdentityProposal {
+  agent_id: string;
+  field: string;
+  current_value: string;
+  proposed_value: string;
+  reason: string;
+}
+
 export interface ReflectionResult {
   patterns: PatternObservation[];
   improvements: ImprovementSuggestion[];
-  identity_proposals: IdentityChangeProposal[];
+  identity_proposals: ReflectionIdentityProposal[];
   new_memories: number;
   timestamp: string;
 }

desktop/src/lib/intelligence-client.ts

@@ -118,6 +118,7 @@ export type {
   ReflectionResult,
   ReflectionState,
   ReflectionConfig,
+  ReflectionIdentityProposal,
   IdentityFiles,
   IdentityChangeProposal,
   IdentitySnapshot,