Pages fall away downward, the pickup comes back, and a real icon set

── Navigation ──

Pages arrived from the right and left to the right. Right is the direction
the system back gesture drags, so a page leaving under a button press read as
a swipe nobody made — and every push in this app is a layer over the one
before it, which arrives from below. The axis is vertical now: the incoming
page rises and covers, the page underneath stays put and dims, and back drops
the top page off the bottom. Full travel rather than the old 14% nudge, which
is what makes the direction nameable. test/page_transition_test.dart holds it.

── Home ──

The pickup pill is back under the greeting. It was cut on the argument that
the form below already carried the pickup; the form is four hundred points
down the screen, and a location you can only see by scrolling to a form is a
location you do not trust. It shows the locality while the form keeps the
door, so the screen answers one question once, and it now has a resolving
state — it used to print the last place you were, confidently, while the fix
was still in flight.

The sphere's caption was falling off the screen. Adding the pill pushed it out
of the scroll viewport, silently, with no overflow warning — the fourth time
Home growing has clipped something under the sphere. DmBookOrb.field is no
longer a constant: the glow gives way to whatever is left, the sphere never
does.

── 74 points of dead canvas, on every root ──

Home, Orders and Account each cleared the floating tab bar by
`MediaQuery.paddingOf(context).bottom + 74`, on the reasoning that the inset is
the home indicator and 74 is the bar above it. Scaffold with extendBody
replaces the body's bottom padding with the bar's whole laid-out height —
measured, a 34pt inset and this bar hand the body 106. They were clearing the
bar, then clearing it again. One helper now, dmTabBarClear().

── One journey, one vocabulary ──

Review said ORIGIN/DESTINATION; Home's form and tracking say PICKUP/DROP.
Three screens a customer walks in order. The tracking card had already written
down the argument; the booking screen hadn't followed.

The rail's first milestone read "Booking created" directly above "Order
created" — down the rail: created, created, in transit. It is "Pickup booked",
which is what JourneyStage.milestoneLabel has called that stage all along on
Orders and on Home's live row.

── The launcher icon ──

tool/icons.py renders all twenty-eight files from one master, because the
failure mode of exporting by hand is nineteen replaced and nine left on the
old mark, at the density nobody checks.

The master is a bare mark on a field, so it cannot be dropped into Android's
adaptive canvas whole: crimson is the background, the white mark is the
foreground, and it is sized by its reach from the canvas centre so a round
mask cannot take the arrow tip. Measured on the built file: 63.7dp against a
66dp safe zone. A real monochrome layer replaces the colour foreground that
was standing in for one — the system tints by alpha, so that themed as a blob.
ic_launcher_round.png exists at last; minSdk is 24 and android:roundIcon had
nothing to resolve to below API 26.

The artwork is flattened (the source vignettes over ten values of red) and its
horizontal offset is placed deliberately rather than inherited — geometric
centring made the mark lean, because the arrow carries the bounding box right
while contributing almost none of the ink.

── Bundle ──

pubspec declared assets/images/ as a folder, which shipped the 974 KB icon
master to every customer for a file no code opens. Named explicitly now.

lib/ui/widgets/book_orb.dart

@@ -63,8 +63,20 @@ class DmBookOrb extends StatefulWidget {
     this.label = 'ONE TOUCH',
     this.caption,
     this.held = false,
+    this.field = maxField,
   });
 
+  /// The sphere itself. Fixed — it is the one object on the screen and it does
+  /// not negotiate its size with the furniture around it.
+  static const disc = 204.0;
+
+  /// The room the pulses are given when the screen can spare it.
+  static const maxField = disc + 116;
+
+  /// The floor. The comet orbits at `disc / 2 + 16`, so anything under this
+  /// clips the one detail that stops the sphere looking switched off.
+  static const minField = disc + 44;
+
   final VoidCallback onTap;
   final String label;
 
@@ -80,6 +92,26 @@ class DmBookOrb extends StatefulWidget {
   /// second use of this widget elsewhere is not forced to repeat itself.
   final String? caption;
 
+  /// The square the sphere floats in, pulses and all.
+  ///
+  /// ── Why this is not a constant any more ──
+  ///
+  /// It was [maxField], always, and the caption under it was therefore the
+  /// first thing off the screen whenever Home grew. That has now happened
+  /// four separate times, most recently when the pickup pill came back under
+  /// the greeting and took 52 points with it: the sphere still drew, the
+  /// caption still existed, and the scroll viewport simply clipped it. Nothing
+  /// failed and nothing said so.
+  ///
+  /// The glow is the part that can afford to give. [_RadarPainter] is already
+  /// parametric — a pulse is born at the sphere's edge and dies at the field's,
+  /// so a smaller field is a shorter pulse rather than a broken one. The
+  /// sphere is [disc] at every size.
+  ///
+  /// The caller passes what it can spare; this clamps it to something the
+  /// comet still fits inside.
+  final double field;
+
   @override
   State<DmBookOrb> createState() => _DmBookOrbState();
 }
@@ -132,8 +164,8 @@ class _DmBookOrbState extends State<DmBookOrb> with TickerProviderStateMixin {
 
   @override
   Widget build(BuildContext context) {
-    const disc = 204.0;
-    const field = disc + 116;
+    const disc = DmBookOrb.disc;
+    final field = widget.field.clamp(DmBookOrb.minField, DmBookOrb.maxField);
 
     return Semantics(
       button: true,
@@ -170,7 +202,7 @@ class _DmBookOrbState extends State<DmBookOrb> with TickerProviderStateMixin {
                     child: AnimatedBuilder(
                       animation: _radar,
                       builder: (_, _) => CustomPaint(
-                        size: const Size.square(field),
+                        size: Size.square(field),
                         painter: _RadarPainter(_radar.value, disc / 2),
                       ),
                     ),