Merge pr/panel-resize into pr/mapillary-layer

Bring in portable, resizable rail panels. The Street Level rail rules get
the same :not(.panel-floating) guard as CCTV's so the panel can float too.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

scripts/format-scope.json

@@ -26,6 +26,8 @@
   "src/main.js",
   "docs/APPLICATION.md",
   "scripts/qa-application.mjs",
+  "scripts/qa-panel-resize.mjs",
+  "src/tooling/panelResizeQa.test.mjs",
   "src/app/application.js",
   "src/app/application.test.mjs",
   "src/app/mapLifecycle.test.mjs",
@@ -152,6 +154,7 @@
   "src/ui/panelRails.js",
   "src/ui/leftPanelRail.js",
   "src/ui/rightPanelRail.js",
+  "src/ui/panelResize.test.mjs",
   "src/ui/panelMeasurement.js",
   "src/ui/panelRailGeometry.js",
   "src/ui/panelRails.test.mjs",