fix: Crisis safety improvements based on audit

- Fix manifest.json external icon dependency (use inline SVG data URIs)
- Add PWA shortcuts for Safety Plan and 988
- Expand crisis keywords (35+ keywords vs original 12)
- Add explicit phrase detection for imminent action
- Add Safety Plan button to crisis panel
- Add 'Are you safe right now?' to crisis panel text
- Support URL param (?safetyplan=true) for PWA shortcut
- Enhanced Service Worker with offline crisis page
- Add CRISIS_SAFETY_AUDIT.md comprehensive report

Addresses gaps identified in post-PR#9 safety audit:
- Self-harm keywords (cutting, self-harm, etc.)
- Passive suicidal ideation detection
- Offline crisis resource page
- Crisis panel quick-access improvements

manifest.json

@@ -1,21 +1,37 @@
 {
   "name": "The Door",
   "short_name": "The Door",
-  "description": "Crisis intervention and support from Timmy.",
+  "description": "Crisis intervention and support from Timmy. Call or text 988 for immediate help.",
   "start_url": "/",
   "display": "standalone",
   "background_color": "#0d1117",
   "theme_color": "#0d1117",
+  "orientation": "portrait",
+  "categories": ["health", "medical"],
   "icons": [
     {
-      "src": "https://picsum.photos/seed/door/192/192",
+      "src": "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 192 192'%3E%3Crect fill='%230d1117' width='192' height='192' rx='24'/%3E%3Ctext x='96' y='120' font-size='80' text-anchor='middle' fill='%23ff6b6b'%3E🚪%3C/text%3E%3C/svg%3E",
       "sizes": "192x192",
-      "type": "image/png"
+      "type": "image/svg+xml"
     },
     {
-      "src": "https://picsum.photos/seed/door/512/512",
+      "src": "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Crect fill='%230d1117' width='512' height='512' rx='48'/%3E%3Ctext x='256' y='320' font-size='220' text-anchor='middle' fill='%23ff6b6b'%3E🚪%3C/text%3E%3C/svg%3E",
       "sizes": "512x512",
-      "type": "image/png"
+      "type": "image/svg+xml"
+    }
+  ],
+  "shortcuts": [
+    {
+      "name": "My Safety Plan",
+      "short_name": "Safety Plan",
+      "description": "Access your personal crisis safety plan",
+      "url": "/?safetyplan=true"
+    },
+    {
+      "name": "Call 988 Now",
+      "short_name": "Call 988",
+      "description": "Immediate connection to Suicide & Crisis Lifeline",
+      "url": "tel:988"
     }
   ]
 }