✨ feat(web): integrate embedded web server, REST/SSE APIs and modernize configuration

- Add embedded KLALBWebServer with REST API, SSE streaming (200ms) and SPA hosting
- Introduce enableTUN configuration flag with fallback and non-admin execution support
- Refactor LineTable and ConnectLineTable to openConnections and autoConnections
- Rename denyLineTableQuery/Broadcast to denyConnectionQuery/Broadcast with backwards compatibility
- Support runtime config hot-reloading and automatic persistence to klalb-config.json
- Update default Web API port to 4665 and update dashboard submodule reference

skills-lock.json

@@ -0,0 +1,11 @@
+{
+  "version": 1,
+  "skills": {
+    "shadcn": {
+      "source": "shadcn/ui",
+      "sourceType": "github",
+      "skillPath": "skills/shadcn/SKILL.md",
+      "computedHash": "c1a68ee06a668aced9ab2b5fbdea5f989864123794eb2e056b339a072dbb7f10"
+    }
+  }
+}