- pkg/calc: DriveForSpeed treats restMass==0 as a valid ceiling-only
case (every positive drive solves it), so locking the displayed
speed of a D=1, W=A=S=C=0 ship is no longer a phantom "infeasible".
- ship-design-area: drive/weapons/shields/cargo inputs use a JS-driven
smart step on ArrowUp/ArrowDown (0↔1 jump, otherwise ±0.1) and hide
the native spinner so it cannot produce invalid (0, 1) values;
armament keeps its native step 1.
- Tech and planet MAT cells follow the same lock idiom as goal-seek
locks: open padlock (🔓) over the inherited value → click to open
an input with a closed padlock (🔒). The padlock slot is always
reserved, so the column width is stable.
- Tech overrides (design area and modernization target) are floored
at the player's current tech on this turn — a lower value is
flagged as invalid.
- custom load capped at cargo capacity (error when exceeded); full load shows the cargo capacity; zero cargo pins load to empty and disables the toggle
- per-input red border + tooltip for every invalid value (blocks, techs, load, MAT, modernization target); no value may be negative; locking a speed is disabled when drive is zero
- display every computed number (results + goal-seek back-solved input) rounded up to 3 decimals via a shared pkg/calc Ceil3 bridged to wasm; engine keeps its own round-to-nearest util.Fixed*
- modernization total upgrade cost spans two columns (single line)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Fuse the standalone ship-class designer (Phases 17/18) into a sidebar calculator: live mass/speed/attack/defence/bombing results, a planet build-rate readout, single-target goal-seek, a modernization-cost mode, and auto reach circles on the map for the selected planet.
pkg/calc becomes the single source for the new math (no mirroring): extract BombingPower from the engine model and the per-turn ship-production loop from controller.ProduceShip into pkg/calc (engine now delegates), and add inverse goal-seek solvers in pkg/calc/solve.go. Thin-bridge the combat, planet-build, and solver functions through ui/core/calc + ui/wasm and rebuild core.wasm.
Remove the standalone designer view/route; the ship-classes table and the view/bottom menus open the calculator via a shared request store.
Docs: rewrite ui/PLAN.md Phase 30, adjust Phase 34 (realistic forecast + CAP/COL ownership), add ui/docs/calculator-ux.md, extend calc-bridge.md, fix navigation.md; remove ui/CALCULATOR.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Ilia Denisov