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@@ -50,8 +50,17 @@ this is the working manual.
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## Layout & frame algorithm (ui.html)
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- Geometry anchors are hard-coded in **three places that must stay in
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- sync**: `tgPos` (rows y=74/386), `tgCablePath` (cable targets 210/266/290),
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+ sync**: `tgPos` (rows y=74/386), `tgCablePath` (cable targets 210/266/290;
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+ row-1 fabric = S-curve in the 346..386 corridor so the port approach is
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+ vertical; `swSvg` ib ports 4+4 across top/bottom edges),
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`swSvg`/`fanSvg` (boxes 210/290, fan cy=318), legend 526, `TG_H` 540.
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+ **Cable mode** (legend toggle `data-topobus`, `state.topoBus`, persisted
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+ `sm121-topobus`, folded into the rebuild sig): *direct* = bezier runs;
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+ *bus + bridges* = `tgCablePathBus` — row-1 Manhattan runs (200g lane
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+ y=366, 10g lane y=278; 10g detours around the fabric box via x=350/710)
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+ with `bridgesSvg` hop arcs (semicircle over the 200g lane) where a 10g
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+ vertical strictly crosses it — detour devices turn on the lane (a T), so
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+ no hop. Row 0 and DAC are unchanged in both modes.
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- Frames: clusters with **identical node sets merge into one rect** with
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side-by-side chips (kills doubled frames + mutual-containment depth
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inflation). Pads grow with region rank Δ = regionMaxDepth − depth:
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