control: home W last in 'Home All'

Previously XYZ and W homing dispatched in parallel. Wait for the
main AVR homing cycle to return to idle before kicking off the W
auxcnc home so they never run simultaneously.

src/js/control-view.js

@@ -255,19 +255,32 @@ module.exports = {
       });
     },
 
-    // Home every enabled axis at once (legacy Onefinity behavior).
-    // The XYZ home is fired first via the standard /api/home endpoint,
-    // then the W axis is homed if it is enabled. The two cycles run
-    // in parallel — W is on the auxcnc ESP and doesn't share motors
-    // with the AVR — so the user sees one click homing everything.
-    home_all: function () {
+    // Home every enabled axis (legacy Onefinity "Home All"). Sequence:
+    //   1. Z, X, Y (and A/B/C if enabled)  via /api/home on the AVR
+    //   2. W axis                          via /api/aux/home on the ESP
+    // The two cycles are dispatched serially: we wait for the main
+    // homing cycle to drop back to idle before kicking off W so the
+    // gantry never moves while the W spindle is also homing.
+    home_all: async function () {
       this.ask_home = false;
-      api.put("home");
-      if (this.w && this.w.enabled) {
-        api.put("aux/home").catch(function (err) {
-          console.error("W home failed:", err);
-        });
+      try {
+        await api.put("home");
+      } catch (e) {
+        console.error("Home all (XYZ) failed:", e);
+        return;
       }
+      if (!this.w || !this.w.enabled) return;
+      // Poll state.cycle until the main homing cycle finishes. The
+      // homing cycle leaves state.cycle as 'homing' until done, then
+      // returns to 'idle'.
+      const start = Date.now();
+      while (Date.now() - start < 120000) {
+        if (this.state && this.state.cycle == "idle") break;
+        await new Promise(r => setTimeout(r, 200));
+      }
+      api.put("aux/home").catch(function (err) {
+        console.error("W home failed:", err);
+      });
     },
 
     aux_jog: function (delta_mm) {