TokenStep 0.1.47: auto-detect Agent rank and surface WorkBuddy

[Backtthefuture]

Changes

• migrate Agent Usage Rank visibility to Auto / Show / Hide with safe legacy settings migration
• auto-show only when a valid local Token Rank identity exists; hidden mode reads no identity and makes no rank request
• strengthen the popover rank hierarchy and show whole-board daily Token total
• surface WorkBuddy in the home card daily source metrics
• update build and download metadata for 0.1.47

Verification

• ./script/build_swiftui_and_run.sh --no-launch
• ./script/test_ccswitch_proxy_collector.sh
• ./script/test_codex_cumulative_collector.sh
• ./script/test_usage_recalibration_migration.sh
• localization and language refresh checks
• live popover screenshot with WorkBuddy and rank card data

Local swift test is delegated to CI because this Mac currently has CommandLineTools without the XCTest module.