Mobile: always-on context-window usage indicator (could reuse the 'Create PR' action area, no extra real estate)

What
On the Claude Code mobile app (Remote Control), add an always-visible indicator of context-window usage during a session (tokens used vs. total window).

Current state
Context is on-demand only on mobile: /context returns a text readout when you ask for it. There is no persistent meter, unlike the terminal/desktop CLI which keeps one in the footer status line. On longer mobile sessions this means repeatedly typing /context to gauge how close you are to the limit.

The real-estate objection, addressed
The usual reason to omit a persistent meter on mobile is screen space. That is avoidable here: the indicator could sit next to the existing 'Create PR' control (or wherever the session action affordances already live), reusing chrome that is already on screen rather than adding a new status bar. A compact percentage or small meter would fit alongside the existing actions.

Nice-to-have
Tap the indicator to expand into the full /context breakdown.