znetsixe ab0d4ed285 Editor: pin outlet, add zone labels + volume to the diagram ...

Three user-facing fixes:

1. Outlet was getting pushed below the tank floor by the top-down
   nudge because its ideal y is already near the bottom. Now
   outflowLevel is PINNED at its proportional y (like basinHeight
   is pinned at the rim) and a second bottom-up pass pushes
   non-pinned items upward from the outlet anchor. Result: outlet
   stays near the tank floor, dryRunLevel sits right above it, the
   rest of the stack stays readable. Two anchors, two passes.

2. Zone labels mirrored from the wiki basin-model drawio:
   - "Spare volume before spilling"  (overflowLevel ↔ maxLevel)
   - "Sewage + tank buffer"          (maxLevel      ↔ startLevel)
   - "Tank buffer"                    (startLevel    ↔ minLevel)
   - "Tank buffer"                    (minLevel      ↔ dryRunLevel)
   - "Dead volume"                    (outflowLevel  ↔ floor)
   Each sits at the midpoint of its pair of nudged thresholds and
   hides when the gap between them is too small to read (< 14 px).

3. basinVolume moved into the SVG as a pinned input above the tank
   rim (alongside basinHeight), replacing the separate form row.
   One editor, one diagram — the total volume belongs with the
   geometry.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-23 13:19:58 +02:00

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