New PWA icons: slate/blue weather icon, distinct dashboard icon, safe-zone maskable

- Redrawn sun-and-cloud icon in the current palette; artwork sits inside the maskable safe zone
  (the old one was clipped by round/squircle masks and used the old warm colours)
- Separate 'any' and 'maskable' manifest entries; opaque iOS touch icons
- Station Dashboard gets its own chart icon so both installed apps are distinguishable
- Vector favicon + PNG fallback; icons verified served by both manifests

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/public/manifest.json

@@ -5,11 +5,17 @@
   "start_url": "/",
   "scope": "/",
   "display": "standalone",
-  "display_override": ["window-controls-overlay", "standalone"],
+  "display_override": [
+    "window-controls-overlay",
+    "standalone"
+  ],
   "background_color": "#070c14",
   "theme_color": "#070c14",
   "orientation": "portrait-primary",
-  "categories": ["weather", "utilities"],
+  "categories": [
+    "weather",
+    "utilities"
+  ],
   "icons": [
     {
       "src": "/icons/icon-192.png",
@@ -21,7 +27,13 @@
       "src": "/icons/icon-512.png",
       "sizes": "512x512",
       "type": "image/png",
-      "purpose": "any maskable"
+      "purpose": "any"
+    },
+    {
+      "src": "/icons/icon-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
     },
     {
       "src": "/icons/icon.svg",
@@ -33,7 +45,11 @@
   "share_target": {
     "action": "/?share",
     "method": "GET",
-    "params": { "title": "title", "text": "text", "url": "url" }
+    "params": {
+      "title": "title",
+      "text": "text",
+      "url": "url"
+    }
   },
   "shortcuts": [
     {
@@ -41,28 +57,48 @@
       "short_name": "Now",
       "description": "View current weather and forecast",
       "url": "/?tab=conditions",
-      "icons": [{ "src": "/icons/icon-192.png", "sizes": "192x192" }]
+      "icons": [
+        {
+          "src": "/icons/icon-192.png",
+          "sizes": "192x192"
+        }
+      ]
     },
     {
       "name": "My Station",
       "short_name": "Station",
       "description": "Live readings from your weather station",
       "url": "/?tab=station",
-      "icons": [{ "src": "/icons/icon-192.png", "sizes": "192x192" }]
+      "icons": [
+        {
+          "src": "/icons/icon-192.png",
+          "sizes": "192x192"
+        }
+      ]
     },
     {
       "name": "Radar Map",
       "short_name": "Map",
       "description": "Live radar and weather map",
       "url": "/?tab=unified-map",
-      "icons": [{ "src": "/icons/icon-192.png", "sizes": "192x192" }]
+      "icons": [
+        {
+          "src": "/icons/icon-192.png",
+          "sizes": "192x192"
+        }
+      ]
     },
     {
       "name": "Active Alerts",
       "short_name": "Alerts",
       "description": "Weather warnings and alerts",
       "url": "/?tab=alerts",
-      "icons": [{ "src": "/icons/icon-192.png", "sizes": "192x192" }]
+      "icons": [
+        {
+          "src": "/icons/icon-192.png",
+          "sizes": "192x192"
+        }
+      ]
     }
   ]
 }