i18n(ar): mirror the layout right to left

- The title, style indicator and both rails swap sides in RTL through logical
  properties (inset-inline-*, margin-inline-*, border-inline-start); LTR
  computes the same values. The Display/Context rail keeps its physical
  `right` for the credit-clearance model and swaps in rtl.css above 720px.
- rtl.css: no letter-spacing on Arabic (it tears joined letters apart);
  Noto Sans Arabic leads the Arabic font stacks so words are not set in a
  fixed-pitch fallback; the intel HUD and cockpit instruments stay a
  left-to-right instrument overlay; media transport and the radio dial stay
  left to right; feed headlines and station names take their own direction;
  the moved rail's arrows flip.
- isolate(): a quantity in RTL text (2.7 كم, -18.0°) is wrapped in
  first-strong isolates so its digits do not join a neighbouring Latin run.

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

src/ui/cyberTheme.test.mjs

@@ -550,7 +550,7 @@ test('Cyber side panels share one width and one framed surface material', () =>
   );
   assert.match(
     cyberStyles,
-    /#right-context-rail\s+:is\(\s*\.cctv-panel-inner,\s*\.weather-panel-inner,\s*\.recent-imagery-panel-inner,\s*\.street-level-panel-inner,\s*\.global-context-panel-inner\s*\) \{\s*padding-right: 8px;/,
+    /#right-context-rail\s+:is\(\s*\.cctv-panel-inner,\s*\.weather-panel-inner,\s*\.recent-imagery-panel-inner,\s*\.street-level-panel-inner,\s*\.global-context-panel-inner\s*\) \{\s*padding-inline-end: 8px;/,
   );
   assert.match(
     cyberStyles,
@@ -765,7 +765,7 @@ test('the Display selector, voice schema and final stylesheet expose Cyber', ()
   assert.match(cyberStyles, /mask-image: linear-gradient\(/);
   assert.match(cyberStyles, /flex: 1 1 auto;/);
   assert.match(cyberStyles, /#left-panel-stack:has/);
-  assert.match(cyberStyles, /left: 54px;/);
+  assert.match(cyberStyles, /inset-inline-start: 54px;/);
   assert.match(cyberStyles, /right: 62px;/);
   assert.match(cyberStyles, /bottom: calc\(2vh \+ 13rem\);/);
   assert.doesNotMatch(cyberStyles, /NAV 01  \/\/  COMMAND BUS  \/\/  VIS 03/);