fix(federation): mobile map readability — fill the space, taller 3D, toggle bottom-centre

- Compact containers (<480px) shrink the fit margins so the scene fills the
  phone screen instead of floating in padding.
- 3D mode steepens its tilt on portrait (-0.95 vs -0.5) so the orbit reads
  as a tall ellipse with depth, not a squashed horizontal band; projection
  params are resolved per-aspect via modeParams() and re-resolve on resize.
- The 2D/3D toggle moves to bottom-centre on mobile (thumb reach, frees the
  top edge); the hint line tucks above it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/components/federation/NetworkMap3D.vue

@@ -132,13 +132,15 @@ const cam = {
            // idle-orbit (nodes hold position so the map stays readable)
 }
 
-/** The two projections the top-right toggle tweens between: '2d' is the
- *  original flat radial map (top-down, orthographic); '3d' is the depth view. */
-const MODES = {
-  '2d': { tilt: -1.45, persp: 18 },
-  '3d': { tilt: -0.5, persp: 3.2 },
-} as const
-type MapMode = keyof typeof MODES
+/** The two projections the toggle tweens between: '2d' is the original flat
+ *  radial map (top-down, orthographic); '3d' is the depth view. Resolved via
+ *  modeParams() — the 3D tilt steepens on portrait containers so the orbit
+ *  reads as a tall ellipse instead of a squashed horizontal band. */
+type MapMode = '2d' | '3d'
+function modeParams(mode: MapMode): { tilt: number; persp: number } {
+  if (mode === '2d') return { tilt: -1.45, persp: 18 }
+  return { tilt: height > width ? -0.95 : -0.5, persp: 3.2 }
+}
 
 /** One dot on a node's point-cloud sphere, in unit-sphere local coords. */
 interface GlobeDot {
@@ -1076,9 +1078,12 @@ function computeFit(tilt: number, perspVal: number): { unit: number; centerY: nu
       yMax = Math.max(yMax, y2 * s)
     }
   }
-  const marginX = 46 // node radius + label half-width clearance
-  const marginTop = 54 // legend / toggle chips
-  const marginBottom = 66 // hint line + node label below the front edge
+  // Compact containers (phones/companion) trade breathing room for scene
+  // size — the map must fill the screen to stay readable.
+  const compact = width < 480 || height < 480
+  const marginX = compact ? 22 : 46 // node radius + label half-width clearance
+  const marginTop = compact ? 42 : 54 // legend / toggle chips
+  const marginBottom = compact ? 58 : 66 // hint + bottom-centre toggle (mobile)
   const bandH = Math.max(80, height - marginTop - marginBottom)
   const unitX = (width / 2 - marginX) / maxAbsX
   const unitY = bandH / Math.max(yMax - yMin, 0.001)
@@ -1091,7 +1096,7 @@ function computeFit(tilt: number, perspVal: number): { unit: number; centerY: nu
  *  Tweens once the scene is live so the reframe glides instead of jumping. */
 function refit() {
   if (!modeInitialized) return
-  const m = MODES[viewMode.value]
+  const m = modeParams(viewMode.value)
   const target = computeFit(m.tilt, m.persp)
   if (Math.abs(target.unit - fit.unit) < 0.5 && Math.abs(target.centerY - fit.centerY) < 0.5) return
   gsap.killTweensOf(fit)
@@ -1105,7 +1110,7 @@ function refit() {
 
 /** Snap (or tween, via setMode) the camera + fit to the given mode. */
 function applyMode(mode: MapMode, animate: boolean) {
-  const target = MODES[mode]
+  const target = modeParams(mode)
   const targetFit = computeFit(target.tilt, target.persp)
   for (const t of modeTween) t.kill()
   modeTween = []
@@ -1459,6 +1464,19 @@ onActivated(() => { if (built && !staticMode) attachTicker() })
     padding: 5px 10px;
     gap: 8px;
   }
+  /* Toggle drops to bottom-centre on mobile — thumb reach, and it frees the
+     top edge so the scene can climb higher */
+  .node-map-mode-toggle {
+    top: auto;
+    right: auto;
+    bottom: 10px;
+    left: 50%;
+    transform: translateX(-50%);
+  }
+  .node-map-hint {
+    bottom: 44px;
+    font-size: 10px;
+  }
 }
 </style>