Each agent card in the SW4RM tab now has a ⋮ button that reveals a
dropdown with single-agent lifecycle actions: R3ST4RT, ST0P, ST4RT,
R3BU1LD, DESTR0Y, PURG3. Items are state-aware (disabled when action
doesn't apply). The button is CSS-invisible until the row is hovered
or the menu is open — quiet rows stay clean. DESTR0Y and PURG3 are
hidden for the manager container.
Click-outside and Escape close the menu. A tree-rebuild (on any SSE
state update) also closes it to avoid stale DOM references.