[0.3] fix(types): unblock websocket.test.ts type errors

[h4yfans]

Summary

Adds a TypeScript type assertion to the require('events') call inside vi.hoisted() in apps/desktop/src/main/sync/websocket.test.ts so the returned module namespace is typed correctly without enabling esModuleInterop project-wide.

The CJS require('events') returned any, which flowed through the destructured EventEmitter and into class MockWS extends EE, cascading into ~45 downstream type errors in that file when checked against tests/tsconfig.json.

Fix applied

// before
const { EventEmitter: EE } = require('events')

// after
const { EventEmitter: EE } = require('events') as typeof import('events')

This was option (b) from the task spec — cast the require result to the proper ES module namespace type. No tsconfig changes needed; avoids the broader blast radius of turning on esModuleInterop / allowSyntheticDefaultImports.

Before / after

• Before (baseline on main): ~45 type errors in apps/desktop/src/main/sync/websocket.test.ts when typechecked via tests/tsconfig.json.
• After (this branch): 0 type errors in websocket.test.ts. Confirmed via pnpm exec tsc --noEmit -p tests/tsconfig.json — remaining errors are in unrelated test files (calendar, inbox, ipc handlers) and outside this unit's scope.
• pnpm --filter @memry/desktop typecheck:node — passes cleanly (test files already excluded by production tsconfig; no regressions).
• pnpm --filter @memry/desktop exec vitest run src/main/sync/websocket.test.ts — 28/28 tests pass.

Test plan

• websocket.test.ts typechecks clean via tests/tsconfig.json
• websocket.test.ts runtime — all 28 tests pass
• typecheck:node still green (test files excluded there)
• CI lint / typecheck / test pipeline green