feat: add server settings (toggle on/off, port selection, start on system start) to Settings UI and backend

apps/web/src/store/settings.ts

@@ -263,6 +263,10 @@ export interface AppSettings {
   activeModel: string;
   aiAgents: AIAgentConfig[];
   activeAgentId: string;
+  // Local / Self-Hosted Server & Startup Settings
+  serverEnabled: boolean;
+  serverPort: number;
+  serverStartOnBoot: boolean;
 }
 
 export const DEFAULT_SETTINGS: AppSettings = {
@@ -292,6 +296,10 @@ export const DEFAULT_SETTINGS: AppSettings = {
   activeModel: DEFAULT_AI_PROVIDERS[0]!.defaultModel,
   aiAgents: DEFAULT_AI_AGENTS,
   activeAgentId: DEFAULT_AI_AGENTS[0]!.id,
+  // Local / Self-Hosted Server & Startup Settings
+  serverEnabled: true,
+  serverPort: 8081,
+  serverStartOnBoot: false,
 };
 
 const STORAGE_KEY = "pubscript.settings.v1";