Harden Postbox protocol and recovery flows

[dasomji]

Summary

• unify Android HTTP/protocol gating and allow saved-server workflows to start offline
• restore stamped Question Chat transport events and classify stale revisions as refreshable conflicts
• persist queue-aware Answer auto-wake state and parse extension config fields independently
• reconcile resolved Android notifications and badges offline, including process restarts and duplicate pushes
• derive Android contract inputs from protocol/server sources of truth and enforce fixture version discipline
• synchronize package version 0.2.14, protocol 0.1.10, and Android 0.4.7 (build 11)

Verification

• npm test — 621 passed
• npm run check -w @pi-postbox/web
• npm run typecheck
• npm run build
• npm run smoke
• npm run check:android-protocol-contract
• node scripts/check-protocol-discipline.mjs main
• ./gradlew testDebugUnitTest lintDebug assembleDebug
• fresh checkout-scoped server: 0.2.14+sha256.0e1370a2a0ab7488, protocol 0.1.10
• Standards and Spec reviews completed with no remaining findings

Closes #97
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Closes #104