fix: scope mobile share install to dashboard path (#223)

frontend/index.html

@@ -3067,7 +3067,7 @@ textarea { resize: vertical; min-height: 120px; }
     if (workSession.active()) workSession.reconcile();
   });
   if ('serviceWorker' in navigator) {
-    navigator.serviceWorker.register('/service-worker.js').catch(error =>
+    navigator.serviceWorker.register('service-worker.js').catch(error =>
       console.warn('Stackchain install support unavailable', error)
     );
   }

frontend/manifest.webmanifest

@@ -2,18 +2,18 @@
   "name": "Stackchain Dashboard",
   "short_name": "Stackchain",
   "description": "Capture, plan, and complete Gitea work from mobile.",
-  "id": "/",
-  "start_url": "/",
-  "scope": "/",
+  "id": "./",
+  "start_url": "./",
+  "scope": "./",
   "display": "standalone",
   "background_color": "#07111f",
   "theme_color": "#0b1220",
   "icons": [
-    {"src": "/static/icons/stackchain-192.png", "sizes": "192x192", "type": "image/png"},
-    {"src": "/static/icons/stackchain-512.png", "sizes": "512x512", "type": "image/png"}
+    {"src": "static/icons/stackchain-192.png", "sizes": "192x192", "type": "image/png"},
+    {"src": "static/icons/stackchain-512.png", "sizes": "512x512", "type": "image/png"}
   ],
   "share_target": {
-    "action": "/",
+    "action": "./",
     "method": "GET",
     "enctype": "application/x-www-form-urlencoded",
     "params": {"title": "title", "text": "text", "url": "url"}

frontend/service-worker.js

@@ -1,5 +1,10 @@
 const CACHE = 'stackchain-shell-v1';
-const SHELL = ['/manifest.webmanifest', '/static/icons/stackchain-192.png', '/static/icons/stackchain-512.png'];
+const BASE = new URL('./', self.location.href).pathname;
+const SHELL = [
+  BASE + 'manifest.webmanifest',
+  BASE + 'static/icons/stackchain-192.png',
+  BASE + 'static/icons/stackchain-512.png',
+];
 
 self.addEventListener('install', event => {
   event.waitUntil(caches.open(CACHE).then(cache => cache.addAll(SHELL)).then(() => self.skipWaiting()));