The "Rādīt stacijas" panel is the only way to fix a value today, and it
opens all 13 fields at once even when only one or two need a tweak. Since
most values are already correct, that's the wrong default interaction for
the common case.
Click a temperature badge directly on the map to edit it inline instead.
Scoped strictly to mode==="faktiska" (Kartes/Ūdens/Brīdinājumi share the
same MapView component and are unaffected). Mirrors Brīdinājumi's existing
canvas-coordinate pattern exactly (getBoundingClientRect scaling via
canvasPoint) rather than inventing a new one, hit-testing against
Faktiskā's already-fixed per-resolution marker positions (faktiskaTemplates)
-- no dragging or calibration needed, just a box test against 13 known
points. The floating input is a plain DOM element positioned over the
canvas, not drawn onto it, so it's preview-only like Brīdinājumi's drag
handles and never reaches the exported PNG.
Reuses the existing updateValue function via a new onEditValue callback
prop, so overrides/reset/the "Manuāli" badge in the stations panel all stay
in sync automatically -- no parallel state to maintain. Added a hover
cursor and a one-line hint ("Klikšķini uz temperatūras kartē, lai to
mainītu") for discoverability, since the whole point was fixing an
undiscoverable interaction, not trading it for another one.
Verified end-to-end: hover shows a pointer cursor over a badge; clicking
shows a correctly positioned input prefilled with the real current value;
Enter commits and the canvas redraws immediately; the change is reflected
in the "Rādīt stacijas" panel as a manual override; Escape cancels without
committing; works correctly at both 1920x1080 and 3840x1440 (different
badge size and marker positions per template); no console errors; Kartes
(a different MapView mode) is unaffected.
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