feat(01-01): add web app manifest for PWA install

- New public/manifest.json with name "Pulse", short_name "Pulse"
- display "standalone", start_url "/mobile", scope "/"
- theme_color #0075AD (Wulf brand blue), background_color #FFFFFF
- Reuses existing icons (/wulff-logo.png, /branding/wulf-mark.png, /favicon.png)
- No service worker, no next-pwa (per spec §4)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

public/manifest.json

@@ -0,0 +1,31 @@
+{
+  "name": "Pulse",
+  "short_name": "Pulse",
+  "description": "Wulf Consulting operations console — tickets, RMM, backups, and analytics on the go.",
+  "start_url": "/mobile",
+  "scope": "/",
+  "display": "standalone",
+  "orientation": "portrait",
+  "theme_color": "#0075AD",
+  "background_color": "#FFFFFF",
+  "icons": [
+    {
+      "src": "/wulff-logo.png",
+      "sizes": "any",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/branding/wulf-mark.png",
+      "sizes": "any",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/favicon.png",
+      "sizes": "any",
+      "type": "image/png",
+      "purpose": "any"
+    }
+  ]
+}