Settings rail: add W Axis entry; deploy scripts (local/hardware/prod)

UX
- The V09 redesign already exposed the W axis in the Control jog grid
  (row 4 when w.enabled) and as a row in the DRO table. The Settings
  shell now also surfaces a dedicated 'W Axis' rail entry that smooth-
  scrolls to the W Axis (auxcnc) section of the main settings page.
  The rail item is marked active only while the user is on Display &
  Units AND the W Axis link was the most recent click.
- The W Axis section in src/svelte-components/src/components/Settings
  View.svelte gets an id="w-axis" anchor so the scroll lands cleanly.

Tested live against onefinity.local. Aux status reports
{enabled: true, present: true, pos_mm: 43.96, homed: false}; the W
axis row appears in the DRO with the right purple styling, and the
jog row 4 shows W- / Home W / W+ / Probe.

Deploy scripts
- deploy.sh dispatches to scripts/deploy/{local,hardware,prod}.sh
  with shorthand wrappers (deploy-local.sh / deploy-hardware.sh /
  deploy-prod.sh).
- local: builds the UI bundle and serves build/http/ via
  python3 -m http.server 8770 in a tmux session 'onefin-local'.
  Useful for visual iteration on macOS — chrome only, no controller.
- hardware: rsyncs the freshly built build/http/ tree onto the Pi at
  onefinity.local and restarts bbctrl. Stages to /tmp on the Pi and
  uses sudo to install into the running egg's bbctrl/http directory,
  so iteration time is ~5 seconds.
- prod: requires a clean working tree, then runs 'make pkg' followed
  by 'make update HOST=onefinity.local PASSWORD=onefinity'.

Defaults can be overridden with environment variables (HOST, PASSWORD,
REMOTE_USER for the hardware path).

src/js/settings-shell-view.js

@@ -47,6 +47,10 @@ module.exports = {
         { sub: "motor", motor: 1, href: "#motor:1", icon: "fa-arrows-up-down-left-right", label: "Motor 1" },
         { sub: "motor", motor: 2, href: "#motor:2", icon: "fa-arrows-up-down-left-right", label: "Motor 2" },
         { sub: "motor", motor: 3, href: "#motor:3", icon: "fa-arrows-up-down-left-right", label: "Motor 3" },
+        // W axis is auxiliary (auxcnc ESP32). Its config lives inside
+        // the main Settings page; we route to #settings and scroll to
+        // the #w-axis anchor on click.
+        { sub: "w-axis", href: "#settings", anchor: "w-axis", icon: "fa-arrows-up-down", label: "W Axis" },
         { section: " " },
         { sub: "macros",         href: "#macros",         icon: "fa-keyboard",     label: "Macros" },
         { sub: "cheat-sheet",    href: "#cheat-sheet",    icon: "fa-book",         label: "G-code Cheat Sheet" },
@@ -95,6 +99,12 @@ module.exports = {
 
     is_active: function (item) {
       if (!item || item.section) return false;
+      // The W Axis rail item is a soft-link into #settings; we mark
+      // it active only when the user is on Display & Units AND the
+      // last clicked rail item was W Axis.
+      if (item.sub === "w-axis") {
+        return this.sub === "settings" && this._w_axis_focus === true;
+      }
       if (item.sub !== this.sub) return false;
       if (item.sub === "motor") {
         return "" + item.motor === "" + this.ridx;
@@ -102,6 +112,23 @@ module.exports = {
       return true;
     },
 
+    on_rail_click: function (item, ev) {
+      // Soft-link rail items use an anchor and a scrollIntoView call.
+      if (item && item.anchor) {
+        ev.preventDefault();
+        // Navigate to settings if not already there, then scroll.
+        if (location.hash !== item.href) location.hash = item.href;
+        this._w_axis_focus = (item.sub === "w-axis");
+        // Defer the scroll so Vue mounts the inner Svelte page first.
+        setTimeout(() => {
+          const el = document.getElementById(item.anchor);
+          if (el) el.scrollIntoView({ behavior: "smooth", block: "start" });
+        }, 250);
+      } else {
+        this._w_axis_focus = false;
+      }
+    },
+
     showShutdownDialog: function () {
       SvelteComponents.showDialog("Shutdown");
     },

src/pug/templates/settings-shell.pug

@@ -9,7 +9,7 @@ script#settings-shell-view-template(type="text/x-template")
       template(v-for="item in rail_items")
         .set-section(v-if="item.section") {{item.section}}
         a.set-item(v-if="!item.section", :class="{active: is_active(item)}",
-          :href="item.href")
+          :href="item.href", @click="on_rail_click(item, $event)")
           .fa(:class="item.icon")
           |  {{item.label}}
       .set-rail-foot

src/svelte-components/src/components/SettingsView.svelte

@@ -95,7 +95,7 @@
             {/each}
         </fieldset>
 
-        <h2>W Axis (auxcnc)</h2>
+        <h2 id="w-axis">W Axis (auxcnc)</h2>
         <fieldset>
             <WAxisSettings />
         </fieldset>