v2.1.0

Names the companion plugins that are not running and hands over the command that installs the ones genuinely absent — with installed, not running kept distinct from not installed, and state unknown instead of a guess when the profile's package list cannot be read. A ✕ dismisses it by writing the panel's existing hidden set, so the rows stay registered and come back from the ◉ visibility mode.

The Workbench tab now carries its own glyph (sliders) instead of a second lightning bolt, so the tab row reads as one system and the ⚡ stays the product mark.

Fixed: a collapsed tab header lost its bottom edge — a React style diff, not CSS. border was byte-identical across the two style objects so React skipped it, while borderBottom: 'none' vanished and React wrote '', clearing the longhands the shorthand had set. Measured in headless Chrome at 2x: fresh collapsed top=1px bottom=1px, open→collapsed top=1px bottom=0px.

Narrative and reasoning in CHANGELOG.md.