feat(editor): F4.5e a router's connections in the device sheet
SheetRun now clicks through Java's JConnectionsDialog with a router, a computer and a switch cabled in the GUIContainer: a click marks a card, the same click unmarks it, another card swaps the cables or moves the one; "+" adds 192.168.0.10/24 up to eight cards, "-" removes the last card with its cable down to none, and a router without a card keeps no gateway. The document adds, removes and swaps a router's cards (the same cables, the same devices), Java's click logic is one function for the test and the page, and the sheet names the address at a cable's far end. The page "Verbindungen verwalten" shows Java's RJ45 buttons in Java's colours with each card's far end below. Not adopted: the last card stays. A card tab or a mark whose card is undone away falls back. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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