Epic: New web experience on phones

[puemos]

• feat(today): add a phone tab bar behind today-rail-nav #111194
• feat(today): add a back header to phone pages #111195
• feat(today): move the context panel button to the phone header #111200
• fix(today): tighten the today home and report in narrow scenes #111209
• feat(today): open search as a full screen on phones #111214
• feat(today): size phone pane rows and text fields for touch #111217
• fix(today): wrap scene title actions in narrow scenes #111197
• fix(today): show the today home on narrow windows #111192
• fix(today): make the briefing highlight readable in dark mode #111212
• feat(today): make the task page and typing feel native on phones #111221