feat: show per-account quotas and Dock access

[AaAndrew233]

Summary

• Show VibeToken as a regular macOS Dock app while retaining the menu bar entry point.
• Display verified per-account 5h and 7d remaining quotas with stale, unobserved, low, and exhausted states.
• Prioritize Pro accounts in relay capacity configuration without changing account-ID based persistence.
• Keep English and Simplified Chinese documentation and UI copy aligned.

Test Coverage

• XCTest covers remaining-percent conversion, clamping, stale data, unobserved data, explicit limits, and stable Pro-first ordering.
• Real macOS UI verification covers current/stale/unobserved rows, long account names, low and zero quota colors, and the Pro multiplier picker.
• AI-assessed path coverage: 85%. Remaining gaps are automated SwiftUI screenshot coverage and automated Dock-click behavior.

Pre-Landing Review

No blocking or informational issues found.

Design Review

Native macOS visual verification passed. The 444-point sheet stays within the 500-point popover and all four columns remain scannable.

Eval Results

No prompt-related files changed. Evals skipped.

Plan Completion

No plan file detected. No deferred plan items.

Verification Results

• swift test: 132 passed, 3 local probes skipped, 0 failed
• ./scripts/build-app.sh
• Strict codesign verification
• git diff --check

Documentation

README.md and README.zh-CN.md describe per-account relay quotas and menu bar/Dock access.

Test plan

• Verify Pro accounts are listed before Plus accounts
• Verify 5h/7d remaining quota values and exceptional states
• Verify long account names do not overlap quota or multiplier columns
• Verify Pro multiplier menu remains interactive
• Verify the built app runs as one signed macOS process