v0.3.1 — fix pane accumulation

agent-report-viewer 0.1.1 / loop-dash 0.1.1 (bug fix)

Fixes mado panes piling up. When the recorded pane was still open but mado -remote open could not reach its mado — typically after a herdr restart restored the pane without the MADO_SOCKET env, so it listened on a different socket — both plugins dropped the record and opened a new pane while leaving the old one on screen.

They now close the orphaned pane before reopening, so there is always exactly one report / dashboard pane per workspace. Normal reuse (tabs added to the live pane) and clean reopen (pane already gone) are unchanged.

Covered by a new test in both suites and reproduced live. See PR #4.