refactor: introduce dedicated identifier types for improved clarity and type safety

frontend/src/desktop/pointer/pointerUtils.ts

@@ -1,4 +1,5 @@
 import { safeInvoke } from '../events';
+import type { DocumentId } from '../../types/identifiers';
 
 export const CLICK_ACTIONS = {
   selectSingle: 'selectSingle',
@@ -25,9 +26,9 @@ export const LONG_PRESS_DURATION_MS = 450;
 export const withinThreshold = (dx: number, dy: number, thresholdSquared: number): boolean => (dx * dx + dy * dy) <= thresholdSquared;
 
 interface PointerIntentArgs {
-  doc: { id: string | number };
+  doc: { id: string };
   entryDescriptor: unknown;
-  selectedDocumentIds: Array<string | number>;
+  selectedDocumentIds: Array<string>;
   metaKey: boolean;
   pointerButton?: number;
   pointerType?: string;
@@ -35,7 +36,7 @@ interface PointerIntentArgs {
 }
 
 export interface PointerIntent {
-  docId: string | number;
+  docId: DocumentId;
   entryDescriptor: unknown;
   pointerType?: string;
   pointerButton?: number;