* refactor(ui): add Web Awesome foundation
* refactor(ui): migrate shared menus and chat controls
* refactor(ui): migrate page controls to Web Awesome
* refactor(ui): migrate workboard controls to Web Awesome
* fix(ui): harden Web Awesome interactions
* test(ui): type Web Awesome dropdown state
* fix(ui): preserve menu focus and selection
* fix(ui): restore agent picker focus
* fix(ui): track keyboard menu dismissal
* fix(ui): ignore stale session menu closes
* fix(ui): complete Web Awesome keyboard migration
* fix(ui): repair Web Awesome lockfile graph
* docs(ui): keep release note in PR body
* fix(ui): satisfy Web Awesome migration gates
* perf(ui): keep Web Awesome theme in startup stylesheet
* fix(ui): replace reopened Web Awesome session menus
* fix(ui): keep replacement session menus open
