Add mobile demo capture controls

What's Changed

• Added a leading-browser control API and mtcli helpers so automation can explicitly claim the browser that drives session terminal scaling.
• Added mobile dense terminal mode settings and scaling support for narrow MidTerm sessions without changing host binaries.
• Added repeatable mobile vertical marketing capture scripts, seeded demo sessions, phone-DPI export, and audit documentation for smartphone-style demo videos.
• Updated marketing feature documentation and OpenAPI/types for the new browser and mobile-capture capabilities.

Stack mobile sidebar actions

What's Changed

• Move mobile sidebar session context actions onto their own touch row so titles and subtitles remain readable.

Fix mobile sidebar drawer

What's Changed

• Make the responsive sidebar drawer opaque under UI transparency.
  Keep mobile sidebar session context actions visible as 44px touch targets.

Show mobile emulation toggle state

What's Changed

• Make the Dev Browser mobile emulation control read as a clear toggle with a visible active state.
  Update the button label and tooltip between enabled and disabled mobile emulation states.

Dev Browser mobile emulation

What's Changed

• Add an active-tab mobile browser emulation toggle to the Dev Browser URL bar.
  Forward mobile User-Agent and client hints through the preview proxy while stripping internal flags before upstream requests.
  Make the Dev Browser soft-keyboard tester reserve viewport space instead of overlaying the website.

Center Dev Browser toolbar glyphs

What's Changed

• Wrap Dev Browser text glyph toolbar icons in an explicit centering layer; Keep screenshot busy-state glyph aligned; Add wiring coverage for the centered glyph structure

Move Dev Browser utilities into overflow

What's Changed

• Keep Dev Browser tabs as pure tabs; Move active-tab screenshot capture to the URL bar; Put keyboard, cookie jar, and clear-state actions into an overflow menu; Keep URL-bar action icons aligned with Command Bay styling

Refine Dev Browser tabs

What's Changed

• Restore real Dev Browser tab shape; Move screenshot capture into each preview tab instead of a global dock action; Enlarge Dev Browser text icons and use the Command Bay send icon for navigation

Compact Dev Browser chrome

What's Changed

• Remove the separate Dev Browser title chrome row so the preview panel starts with the tab strip instead of wasting vertical space.
• Move agent hint, screenshot, detach, and close controls into the preview tab strip and restyle preview buttons with Command Bay control tokens for a tighter, consistent feel.

Fix Blazor web previews

What's Changed

• Proxy Blazor Server previews with a MidTerm-scoped base href so routed pages such as /login render the real application instead of the preview path falling into the app's 404 route.
• Keep relative assets, Blazor initializers, SignalR negotiation, and form posts inside the web preview proxy so admin sites remain visible and interactive from the Dev Browser.