feat: Add meta descriptions to pages

Adds a meta description tag to the landing, crops, plantings, harvests, seeds, and comments pages.

Also creates a new index page for comments.

app/views/comments/index.html.haml

@@ -0,0 +1,13 @@
+- content_for :title, "Comments"
+- content_for :meta_description, "Browse and search for comments."
+- content_for :breadcrumbs do
+  %li.breadcrumb-item.active= link_to "Comments", comments_path
+
+%h1 Comments
+
+= will_paginate @comments
+
+- @comments.each do |comment|
+  = render 'single', comment: comment
+
+= will_paginate @comments

app/views/crops/index.html.haml

@@ -1,4 +1,5 @@
 - content_for :title, t('.title')
+- content_for :meta_description, "Browse and search for crops."
 
 - content_for :buttonbar do
   - if can? :wrangle, Crop

app/views/harvests/index.html.haml

@@ -1,5 +1,6 @@
 - content_for(:title) do
   = title('harvests', @owner, @crop, @planting)
+- content_for :meta_description, "Browse and search for harvests."
 - content_for :breadcrumbs do
   - if @owner
     %li.breadcrumb-item= link_to 'Harvests', harvests_path

app/views/home/index.html.haml

@@ -1,5 +1,7 @@
 - content_for :title do
   = ENV['GROWSTUFF_SITE_NAME']
+- content_for :meta_description do
+  Growstuff is a community of food gardeners. Let's learn to grow food together.
 
 - if member_signed_in?
   .row

app/views/layouts/_head.html.haml

@@ -27,6 +27,10 @@
 
   %title
     = content_for?(:title) ? yield(:title) + " - #{ENV['GROWSTUFF_SITE_NAME']} " : ENV['GROWSTUFF_SITE_NAME']
+  - if content_for?(:meta_description)
+    %meta{name: "description", content: yield(:meta_description)}
+  - else
+    %meta{name: "description", content: "Growstuff is a community of food gardeners. Let's learn to grow food together."}
   = csrf_meta_tags
   = stylesheet_link_tag "application", media: "all"
 

app/views/plantings/index.html.haml

@@ -1,4 +1,5 @@
 - content_for :title, title('plantings', @owner, @crop, @planting)
+- content_for :meta_description, "Browse and search for plantings."
 
 - content_for :breadcrumbs do
   - if @owner

app/views/seeds/index.html.haml

@@ -6,6 +6,7 @@
     %li.breadcrumb-item.active= link_to 'Seeds', seeds_path
 
 - content_for :title, title('seeds', @owner, @crop, @planting)
+- content_for :meta_description, "Browse and search for seeds."
 
 .row
   .col-md-2