Fix Command Code rolling and monthly usage windows

[derekszen]

Summary

• read Command Code API-key credentials from the CLI auth file or environment
• fetch live 5-hour, weekly, and monthly billing windows through the alpha billing API
• preserve browser-cookie fallback while allowing Linux auto mode to use API-key auth
• expose reset timestamps and correct quota labels in provider output
• add cross-platform and Linux coverage for auth, headers, percentages, and reset dates

Verification

• make test
• ./Scripts/lint.sh lint-linux
• SwiftFormat lint on changed files
• live codexbar usage --provider commandcode --format json --pretty against a Go account

[clawsweeper]

ClawSweeper status: review started.

I am starting a fresh review of this pull request: Fix Command Code rolling and monthly usage windows This is item 1/1 in the current shard. Shard 0/1.

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Keep monthly depletion stabilization on the tertiary lane

When the optional subscription request fails after a paid snapshot, commandCodeSnapshotResolvingDepletionOnEnrichmentFailure still reads and replaces primary, but this change makes primary the live five-hour window and moves monthly usage to tertiary. Consequently, a transient enrichment failure can falsely replace valid five-hour usage with 100%, while a snapshot without a rolling window no longer preserves the depleted monthly lane at all; update that stabilization path and its Command Code quota-transition tests to operate on tertiary.

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