Fix iOS PWA to reuse app instance instead of opening new tabs

[Copilot]

iOS Safari opens a new browser tab each time users tap the home screen icon instead of returning to the existing PWA instance.

Changes

• templates/manifest.json.erb: Set display: "standalone" and start_url: "./"

  • standalone mode signals iOS to treat this as an app, not browser content
  • Relative path ./ enables iOS to properly identify and reuse the running instance

• test/render_test.rb: Added test_manifest_pwa_settings to validate manifest generation

Before/After

 {
   "name": "News Firehose",
-  "start_url": "index.html",
-  "display": "minimal-ui",
+  "start_url": "./",
+  "display": "standalone",
 }

The minimal-ui display mode doesn't provide sufficient isolation for iOS to maintain a single app instance.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• example.com
  • Triggering command: /usr/bin/ruby ruby render.rb (dns block)
• www.nevadacountyca.gov
  • Triggering command: /usr/bin/ruby ruby render.rb (dns block)
  • Triggering command: /usr/bin/ruby ruby test/render_test.rb (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Possible to make the home screen installed app / manifest not open a new tab every time the icon is clicked - iOS has this behavior in particular

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