fix: reconcile live auth and improve release UX

[joonshakya]

Summary

• Require the stored account and live auth.json credentials to resolve to the same ChatGPT account ID before synchronizing tokens.
• Preserve legacy accounts by deriving their account ID from the stored ID token when possible.
• Reconcile the active account with Codex's live credentials before fetching usage.
• Allow usage limits and account metadata to load while Codex/ChatGPT is running without rotating its active refresh token.
• Add a required release note to the release helper and store it in the annotated Git tag.
• Pass the release note to the GitHub release body so it appears in the updater prompt.
• Move the Warm Up All action from the overflow menu to an icon-only amber button in the navigation bar.

Why

PRs #128 and #134 fixed stale refresh-token restoration and expired ID tokens during account switching.

This follow-up addresses two remaining problems:

1. Live credentials could be copied into a stored profile when the stored account identity was unknown.

2. Refreshing usage for the active account failed while Codex was running with:

   Cannot refresh the active account while Codex/ChatGPT is running

The active account now uses credentials already refreshed by the running Codex app. Codex Switcher does not attempt to rotate that account's refresh token.

Validation

• cargo test --manifest-path src-tauri/Cargo.toml — 47 passed
• cargo clippy --manifest-path src-tauri/Cargo.toml --all-targets — completed with 11 pre-existing warnings
• pnpm build
• Workflow YAML validation
• git diff --check
• Manually refresh usage while Codex is running
• Manually trigger Warm Up All from the navigation bar
• Verify a test release displays the supplied release note

Related

• Follow-up to fix: preserve rotated auth tokens when switching accounts #128
• Follow-up to fix: refresh expired ID tokens before account switch #134
• Related to Codex App shows sign in screen frequently and only works after remove and re-add the account in Codex Switcher. #129