Fix: real-hardware bring-up issues found at 1920x1080 on the Pi

After testing the V09 redesign live on the Pi at onefinity.local
(1920x1080, Chrome fullscreen) several real bugs surfaced. This
commit fixes all of them.

Layout fits at 1920x1080
- Cap .app-shell at 100vh height with overflow:hidden so child
  flex containers actually constrain to one screen.
- Make .control-page / .program-page / .console-page use
  flex 1 1 auto + min-height 0 + overflow hidden so the page total
  no longer grows to ~36 000 px when the gcode-viewer is mounted.
- Override clusterize.css default max-height: 200px on the
  .clusterize-scroll element with max-height: none + flex 1 1 0 +
  height 100% so the gcode listing fills the available column.

E-Stop in the header
- The legacy estop.pug SVG had width=130 height=130 but no
  viewBox, so CSS-only sizing did nothing and the SVG content
  spilled ~26 px off the right edge of the screen and ~70 px
  below the header. Add viewBox="0 0 130 130" plus
  preserveAspectRatio so CSS sizing actually shrinks the inner
  geometry. Drop the octagonal clip-path (the SVG already
  carries its own yellow safety ring + EMERGENCY/STOP text).

3D toolpath preview (path-viewer)
- The legacy .path-viewer.small CSS clamped the canvas to
  340 x 150 floated into the corner. In the new program-body
  grid we want it to fill the 600 px right column. Override
  with width 100%, height auto, float none, !important.
- Make orbit.js wheel/touchstart/touchmove listeners
  {passive: false} so OrbitControls.preventDefault() actually
  works and the page no longer scrolls while panning the 3D
  view on a touch screen.

Vue 1 template + reactivity bugs exposed by the live data
- Replace v-else-if (Vue 1 has no v-else-if) in
  control-view.pug with three sibling v-if templates that
  mutually exclude on w.enabled and state['2an'] == 3.
- axis-vars._get_motor_id: guard motor.axis.toLowerCase()
  against undefined motors (initial config is [{}, {}, ...]).
- axis-vars._check_is_enabled: prefer config.motors[i].axis
  when present, fall back to state[N + 'an'] only for
  recognised axes (x/y/z/a) so undefined == undefined
  doesn't mistakenly enable b/c rows.
- program-mixin: tolerate state.files / state.gcode_list
  being undefined right after connect.

App-shell race conditions
- Skip the early parse_hash() in app.js ready() when the
  initial hash is in the settings family. Those Svelte
  components read settings.units / settings.probing-prompts /
  motion.* etc. and crash on first paint with the empty
  placeholder config. Stay on loading-view until update()
  completes and routes us in itself.

Misc
- src/static/js/ui.js: null-guard the legacy burger menu code
  (#menuLink no longer exists). Was throwing 'Cannot set
  properties of null (setting onclick)'.
- src/static/css/Audiowide.css: switch the gstatic font URL
  from http:// to https:// so it isn't blocked as mixed
  content under the home.muehe.org HTTPS proxy.
- Macro buttons: drop the default 6 px yellow border-left.
  The stripe now only appears via .has-color when
  state.macros[i].color is actually configured. Removes the
  asymmetric/lopsided look from the screenshot.

Tested live on http://10.1.10.55/ and via the HTTPS proxy at
https://onefinity.home.muehe.org/.

src/stylus/style.styl

@@ -74,7 +74,9 @@ tt
 .app-shell
   display flex
   flex-direction column
-  min-height 100vh
+  height 100vh   // cap at viewport so children that ask for 1fr/flex:1
+  width 100%
+  overflow hidden
   background $body-bg
 
 .app-body
@@ -83,9 +85,10 @@ tt
   display flex
   flex-direction column
   padding 18px
+  overflow auto  // settings/motor pages can scroll inside the body
 
   > *
-    flex 1
+    flex 1 1 auto
     min-height 0
 
 .app-head
@@ -496,28 +499,34 @@ span.unit
   50%
     fill #ff9d00
 
-// Octagonal STOP wrapper around the existing <estop> SVG. The SVG
-// rules below (`.button`, `.ring`, etc.) keep working unchanged.
+// E-Stop in the header — wraps the legacy <estop> SVG component.
+// Sized to fit the 96px header with breathing room. The SVG carries
+// its own yellow safety ring and EMERGENCY/STOP text; we only frame
+// it with a soft drop shadow and a hover/active hit target.
 .app-head .estop
-  width 88px
-  height 88px
-  background #dc2626
-  clip-path polygon(30% 0, 70% 0, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0 70%, 0 30%)
-  display flex
+  width 80px
+  height 80px
+  display inline-flex
   align-items center
   justify-content center
-  border 3px solid #fff
-  box-shadow 0 0 0 3px #b91c1c, 0 8px 20px rgba(220, 38, 38, 0.35)
+  border-radius 9999px
   cursor pointer
-  transition transform 0.06s
+  transition transform 0.06s, filter 0.15s
+  flex 0 0 auto
+  // Make sure the SVG's internal coordinate space scales correctly
+  overflow visible
+
+  &:hover
+    filter brightness(1.05)
 
   &:active
     transform scale(0.96)
 
   svg
-    width 56px
-    height 56px
+    width 80px
+    height 80px
     cursor pointer
+    display block
 
     .button:hover
       filter brightness(120%)
@@ -1009,11 +1018,12 @@ tt.save
 // CONTROL page (V09)
 // =====================================================================
 .control-page
-  flex 1
+  flex 1 1 auto
   min-height 0
   display flex
   flex-direction column
   gap 14px
+  overflow hidden
 
 .control-page .control-grid
   display grid
@@ -1362,7 +1372,6 @@ tt.save
   height 84px
   border-radius 14px
   border 1px solid transparent
-  border-left 6px solid $accent
   color #fff
   background $jog-bg
   font-weight 800
@@ -1386,6 +1395,12 @@ tt.save
     opacity 0.45
     cursor not-allowed
 
+  // Per-macro color stripe is opt-in via :class="has-color" set by
+  // the template only when state.macros[i].color is configured.
+  &.has-color
+    border-left-width 6px
+    border-left-style solid
+
   .mnum
     display inline-flex
     align-items center
@@ -1398,16 +1413,12 @@ tt.save
     font-size 0.85rem
     font-weight 900
     text-shadow none
-
-  .micon
-    font-size 1.1rem
-    opacity 0.75
+    flex 0 0 auto
 
   .mname
     white-space nowrap
     overflow hidden
     text-overflow ellipsis
-    max-width 9em
 
 // Override drawer
 .override-drawer
@@ -1487,10 +1498,11 @@ tt.save
 // PROGRAM page (V09)
 // =====================================================================
 .program-page
-  flex 1
+  flex 1 1 auto
   min-height 0
   display flex
   flex-direction column
+  overflow hidden
 
 .program-card
   flex 1
@@ -1609,7 +1621,7 @@ tt.save
     min-width 300px
 
 .program-body
-  flex 1
+  flex 1 1 auto
   display grid
   grid-template-columns 1fr 600px
   min-height 0
@@ -1617,13 +1629,36 @@ tt.save
 
   > .gcode
     border-right 1px solid $line-soft
-    overflow auto
     background #fafafa
     padding 0
     margin 0
+    overflow hidden
+    min-height 0
+    display flex
+    flex-direction column
 
+  // 3D toolpath preview — fill the entire 600px column. Override the
+  // legacy `.path-viewer.small` rule which would clamp the canvas to
+  // 340x150 and float it into the corner.
   > .path-viewer
     overflow hidden
+    min-height 0
+    display flex
+    flex-direction column
+
+    .path-viewer-content
+      flex 1 1 auto
+      width 100% !important
+      height auto !important
+      min-height 0
+      float none !important
+      margin 0 !important
+
+    &.small .path-viewer-content
+      width 100% !important
+      height auto !important
+      float none !important
+      margin 0 !important
 
 .progress-bar
   height 28px
@@ -1645,8 +1680,20 @@ tt.save
   font-size 13px
   line-height 1.55
 
+  .clusterize
+    flex 1 1 0
+    min-height 0
+    overflow hidden
+    display flex
+    flex-direction column
+    height 100%
+
   .clusterize-scroll
-    max-height 100%
+    flex 1 1 0
+    min-height 0
+    height 100%
+    max-height none  // override clusterize.css default of 200px
+    width 100%
     overflow auto
 
   ul
@@ -1675,9 +1722,10 @@ tt.save
 // CONSOLE page (V09)
 // =====================================================================
 .console-page
-  flex 1
+  flex 1 1 auto
   display flex
   min-height 0
+  overflow hidden
 
 .console-card
   flex 1