fix(code): preserve wheel zoom across resize

[richardsolomou]

Problem

Ctrl+wheel zoom could be overwritten after resize or reload. Failed persistence also left later gestures using a stale baseline.

Changes

Track logical zoom in memory, serialize competing zoom actions, and persist it as a best-effort side effect.

How did you test this?

• pnpm --filter code exec vitest run src/main/zoom.test.ts
• pnpm --filter code typecheck and pre-commit pnpm typecheck
• Real Electron resize and reload testing

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

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[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit df08e60.}

[posthog]

👋 Visual changes detected for this PR.

Review and approve in PostHog Visual Review

If these changes are unexpected, they may be caused by a flaky test or a broken snapshot on master. Don't approve — rerun the job or wait for a fix.

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(code): preserve wheel zoom across re..." | Re-trigger Greptile}