Add SpoolBuddy AMS slot config, external slots, and dashboard redesign

- AMS page: external spool slots (Ext/Ext-L/Ext-R), click-to-configure
  modal on all slots, temperature/humidity threshold-colored indicators,
  nozzle L/R badges for dual-nozzle printers, compact AMS-HT layout
- Dashboard: two-column layout with device status + printers list (left)
  and current spool card (right), state-colored scale/NFC icons, dashed
  border card styling
- Daemon: suppress redundant scale reports (±2g threshold + stability
  state change detection) to prevent weight display bouncing
- TopBar: auto-select online printers only, SpoolBuddy logo

static/index.html

@@ -23,8 +23,8 @@
 
     <!-- Splash screens for iOS -->
     <link rel="apple-touch-startup-image" href="/img/android-chrome-512x512.png" />
-    <script type="module" crossorigin src="/assets/index-CxFtC4Kb.js"></script>
-    <link rel="stylesheet" crossorigin href="/assets/index-DJjXosw8.css">
+    <script type="module" crossorigin src="/assets/index-C7NPsWbv.js"></script>
+    <link rel="stylesheet" crossorigin href="/assets/index-DAOWLKX-.css">
   </head>
   <body>
     <div id="root"></div>