[accessd]

What changed

• Preserve each done pane's pending reset marker until that pane receives focus.
• Extend the focus reset test with two done panes in the same window.

Why

Focusing one done pane cleared PENDING_RESET for every done pane in the window while resetting only the focused pane's background. A sibling pane could remain green with no state marker left to clear it on later focus.

The regression appeared after pane styling moved from select-pane -P to pane-scoped set-option -p. The old focus side effect happened to recreate each pane's pending reset marker after the window-wide cleanup.

Impact

Each done pane now keeps its deferred background until it receives focus, then resets to the default background.

Validation

• ./tests/run-all.sh
• bash -n agent-indicator.tmux scripts/*.sh install.sh setup.sh
• shellcheck scripts/pane-focus-in.sh tests/test-focus-reset-done.sh
• git diff --check