feat(ui): F8-12 — owner feedback round 2 (#55)

* Bug fix: theme flip no longer leaves planets oversized. The
  camera-preserving remount now calls a new
  `RendererHandle.refreshCameraDerivedDraws` explicitly after the
  manual moveCenter/setZoom pair so the post-mount geometry tracks
  `viewport.scaled` even if pixi-viewport's `'zoomed'` listener
  races the next Ticker tick.
* Doc #3: clicks on a planet label route through the same hit-test
  path as a click on the disc. The label `Container` now has a
  pointer hit area sized to the text + frame padding; pointertap
  simulates a click at the planet centre, so selection and
  pick-mode resolution behave identically.
* Doc #4: battle X-crosses + cargo arrowhead wings grow
  sub-linearly with zoom (PLANET_SIZE_ZOOM_ALPHA). New
  `Style.softLengthAnchor` ('center' / 'start') makes the renderer
  treat the recorded endpoints as the geometry "at the reference
  scale" and rescale around the midpoint (X-cross) or the start
  endpoint (arrow wings). Arrowhead base length is halved from 6
  to 3 world units to match the owner's "in half" request.
* Doc #5: picker overlay loses the anchor ring at the source, the
  cursor line drops to a cargo-route-thin 0.6 px stroke, and the
  hover ring around the destination is replaced by a planet-style
  outline (visible disc + 1 px padding) in the `pickHighlight`
  accent — so candidate destinations read like selection in warm
  yellow.
* Doc #6: regression test pins the in-disc hit zone.
* Perf #1: camera-driven redraws are throttled onto the next
  Ticker tick. A rapid wheel / pinch burst now coalesces into at
  most one `clear() + redraw` pass per painted frame, which keeps
  the 500-planet map responsive on zoom and toggle flips.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/src/lib/active-view/map.svelte

@@ -599,6 +599,14 @@ preference the store already manages.
 				handle.viewport.moveCenter(world.width / 2, world.height / 2);
 				handle.viewport.setZoom(minScale * 1.05, true);
 			}
+			// `viewport.setZoom` emits `zoomed` through the next Ticker
+			// tick, but the handler can race the synchronous setExtras /
+			// label / outline calls that follow — and a theme-flip
+			// remount has been observed to leave primitives drawn at the
+			// boot scale until the user nudges the wheel. Force the
+			// camera-derived redraw explicitly here so the post-mount
+			// state always matches `viewport.scaled`.
+			handle.refreshCameraDerivedDraws();
 			if (mode === "no-wrap") handle.setMode("no-wrap");
 			detachClick = handle.onClick(handleMapClick);
 			pickService?.bindResolver(({ sourcePlanetNumber, reachableIds, onResolve }) => {