feat: add MCP and LSP tooling support

Add global MCP/LSP settings, per-session Activity toggles, sidecar runtime integration, tests, and documentation updates.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/shared/domain/workspace.ts

@@ -2,12 +2,14 @@ import type { PatternDefinition } from '@shared/domain/pattern';
 import { createBuiltinPatterns } from '@shared/domain/pattern';
 import type { ProjectRecord } from '@shared/domain/project';
 import type { SessionRecord } from '@shared/domain/session';
+import { createWorkspaceSettings, type WorkspaceSettings } from '@shared/domain/tooling';
 import { nowIso } from '@shared/utils/ids';
 
 export interface WorkspaceState {
   projects: ProjectRecord[];
   patterns: PatternDefinition[];
   sessions: SessionRecord[];
+  settings: WorkspaceSettings;
   selectedProjectId?: string;
   selectedPatternId?: string;
   selectedSessionId?: string;
@@ -20,6 +22,7 @@ export function createWorkspaceSeed(): WorkspaceState {
     projects: [],
     patterns: createBuiltinPatterns(timestamp),
     sessions: [],
+    settings: createWorkspaceSettings(),
     lastUpdatedAt: timestamp,
   };
 }