make Haven resilant to feeds that have items missing links

note: also revert github actions build to ubuntu-22.04 to resolve gcc segfaults for native exensions on arm64
see example failure here: https://github.com/havenweb/haven/actions/runs/13115117753/job/36587454025

.github/workflows/docker-image.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4

Gemfile.lock

@@ -161,7 +161,7 @@ GEM
     mini_magick (4.13.2)
     mini_mime (1.1.5)
     minitest (5.25.1)
-    msgpack (1.7.2)
+    msgpack (1.7.5)
     net-imap (0.4.17)
       date
       net-protocol

app/views/feeds/read.html.erb

@@ -54,7 +54,7 @@ end
       <source src="<%= entry.audio %>" type="audio/mpeg">
     </audio> 
   <% end %>
-  <% if entry.link.start_with? "https://www.youtube.com/watch?v=" 
+  <% if !entry.link.nil? && entry.link.start_with?("https://www.youtube.com/watch?v=")
        video_id = entry.link.split("?v=").last.split("&").first
        video_img = "https://img.youtube.com/vi/#{video_id}/0.jpg"
      %>

lib/haven_feed_entry.rb

@@ -10,6 +10,7 @@ def initialize(feed, item)
       @feed_title = feed.channel.title
       @title = item.title
       @link = item.link
+      @link = "" if @link.nil?  ## prevent missing links from pulling nils into the DB
       @date = parse_time(item.date)
       @content = item.description
       @content = item.content_encoded if item.content_encoded