fix(pwa): emit legacy service-worker2.js and unregister old registrations

[hsingh23]

Motivation

• The PWA was not reliably updating because the running service worker registrations pointed at a different filename than the new Vite PWA output.
• Legacy registrations (older script names) can block activation of new builds and must be cleaned up before registering the current worker.
• Keep a manual hook to trigger updates programmatically and trigger checks on visibility/online events.

Description

• Configure VitePWA to emit the legacy filename by setting filename: "service-worker2.js" in vite.config.js.
• Add unregisterLegacyServiceWorkers in src/index.jsx to find and unregister registrations whose scriptURL does not end with service-worker2.js.
• Add registerServiceWorker which calls the cleanup and then captures the updateSW helper from registerSW, and call it from bootstrap before app render.
• Expose a manual update hook as window.requestServiceWorkerUpdate and trigger it on visibilitychange (when visible) and online events, with informative console logs in lifecycle callbacks.

Testing

• Ran bun run validate (which runs tsc --noEmit && bun run lint && bun run test) and it failed due to missing dependencies and type declarations in the environment.
• No other automated tests were executed in this environment because the type/module resolution errors prevented the full validation pipeline from completing.

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Codex Task

[hsingh23]

@codex fix merge conflict

[chatgpt-codex-connector]

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[hsingh23]

@codex resolve conflict

[chatgpt-codex-connector]

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[hsingh23]

@codex fix merge conflict

…

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[chatgpt-codex-connector]

Summary

• No merge conflicts found in the working tree; repository is clean after restoring unintended local lockfile changes.
• Attempted the required superpowers bootstrap command, but the executable was not present in this environment.

Testing

• ❌ bun run validate (failed: missing dependencies/type declarations in the environment)

Notes

• Superpowers bootstrap failed: /root/.codex/superpowers/.codex/superpowers-codex not found.

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