Refine account panel density and pill contrast

[yvette-carlisle]

Summary

• compact account summary/status cards and phase metrics
• tune account names and running issue pills for better visual balance
• add explicit adaptive fill/stroke for shared pill surfaces so light theme contrast is visible

Verification

• swift test --package-path apps/decodex-app
• apps/decodex-app/script/build_and_run.sh --verify
• git diff --check
• light theme screenshot smoke: /tmp/decodex-pill-surface-light.png