chore(deps-dev): upgrade electron from 24.3.1 to 35.7.5

[jjeff]

Summary

• Upgrade Electron from 24.3.1 to 35.7.5 (major version upgrade)
• Fix TypeScript compatibility issues introduced by the new Electron types
• Update playground example to use the same Electron version

Changes

• package.json: Update electron to ^35.7.5
• examples/playground/package.json: Update electron to ^35.7.5
• src/ProgressWindow/preload.ts:
  • Use Electron's native IpcRendererEvent type instead of custom interface
  • Simplify removeListener call by removing unnecessary casts
• examples/playground/tsconfig.json: Add skipLibCheck: true to resolve type conflicts between @types/node and Electron's bundled types

Why these changes were needed

The Electron 35 types changed the IpcRendererEvent interface. The previous custom interface required a senderId property that doesn't exist on the renderer-side event. Using Electron's own exported type ensures forward compatibility.

Test plan

• TypeScript build passes (npm run build)
• Unit tests pass (npm test)
• E2E tests pass (npm run test:e2e) - CI will verify

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR upgrades Electron from version 24.3.1 to 35.7.5, a major version jump spanning 11 major releases. The upgrade requires TypeScript compatibility fixes to address breaking changes in Electron's type definitions, particularly around IPC event handling.

Changes:

• Upgrade Electron dependency from ^24.3.1 to ^35.7.5 in both main package and playground example
• Replace custom IpcRendererEvent interface with Electron's native type
• Simplify removeListener implementation to use a cleaner type cast instead of casting the entire ipcRenderer object
• Add skipLibCheck to playground tsconfig.json to resolve type conflicts between @types/node and Electron's bundled types

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Updates Electron dev dependency to ^35.7.5
src/ProgressWindow/preload.ts	Adopts Electron's native IpcRendererEvent type and simplifies removeListener with cleaner type casting
examples/playground/package.json	Updates Electron dev dependency to match main package version
examples/playground/tsconfig.json	Adds skipLibCheck to handle type conflicts in example code
examples/playground/package-lock.json	Updates dependency tree for Electron 35.7.5, including @types/node upgrade to v22 and lockfile format v3

Files not reviewed (1)

• examples/playground/package-lock.json: Language not supported

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