feat(viking): add local server management for privacy-first deployment

Backend (Rust):
- viking_commands.rs: Tauri commands for server status/start/stop/restart
- memory/mod.rs: Memory module exports
- memory/context_builder.rs: Context building with memory injection
- memory/extractor.rs: Memory extraction from conversations
- llm/mod.rs: LLM integration for memory summarization

Frontend (TypeScript):
- context-builder.ts: Context building with OpenViking integration
- viking-client.ts: OpenViking API client
- viking-local.ts: Local storage fallback when Viking unavailable
- viking-memory-adapter.ts: Memory extraction and persistence

Features:
- Multi-mode adapter (local/sidecar/remote) with auto-detection
- Privacy-first: all data stored in ~/.openviking/, server only on 127.0.0.1
- Graceful degradation when local server unavailable
- Context compaction with memory flush before compression

Tests: 21 passing (viking-adapter.test.ts)

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

desktop/src-tauri/src/memory/mod.rs

@@ -0,0 +1,13 @@
+//! Memory Module - OpenViking Supplemental Components
+//!
+//! This module provides functionality that the OpenViking CLI lacks:
+//! - Session extraction: LLM-powered memory extraction from conversations
+//! - Context building: L0/L1/L2 layered context loading
+//!
+//! These components work alongside the OpenViking CLI sidecar.
+
+pub mod extractor;
+pub mod context_builder;
+
+pub use extractor::{SessionExtractor, ExtractedMemory, ExtractionConfig};
+pub use context_builder::{ContextBuilder, EnhancedContext, ContextLevel};