Reorganize Settings sections + add LLM model/prompt configs (#116)

* Reshuffle/organize settings UI
* Settings: AI prompt display/minor touch-ups
* API key settings tests
* Moved import/export together
* Collapsible LLM prompt DIVs
* Add export tests

app/controllers/settings/ai_prompts_controller.rb

@@ -0,0 +1,12 @@
+class Settings::AiPromptsController < ApplicationController
+  layout "settings"
+
+  def show
+    @breadcrumbs = [
+      [ "Home", root_path ],
+      [ "AI Prompts", nil ]
+    ]
+    @family = Current.family
+    @assistant_config = Assistant.config_for(OpenStruct.new(user: Current.user))
+  end
+end

app/controllers/settings/api_keys_controller.rb

@@ -8,7 +8,7 @@ class Settings::ApiKeysController < ApplicationController
   def show
     @breadcrumbs = [
       [ "Home", root_path ],
-      [ "API Keys", nil ]
+      [ "API Key", nil ]
     ]
     @current_api_key = @api_key
   end

app/controllers/settings/guides_controller.rb

@@ -0,0 +1,18 @@
+class Settings::GuidesController < ApplicationController
+  layout "settings"
+
+  def show
+    @breadcrumbs = [
+      [ "Home", root_path ],
+      [ "Guides", nil ]
+    ]
+    markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML,
+      autolink: true,
+      tables: true,
+      fenced_code_blocks: true,
+      strikethrough: true,
+      superscript: true
+    )
+    @guide_content = markdown.render(File.read(Rails.root.join("docs/onboarding/guide.md")))
+  end
+end

app/controllers/settings/profiles_controller.rb

@@ -5,6 +5,10 @@ class Settings::ProfilesController < ApplicationController
     @user = Current.user
     @users = Current.family.users.order(:created_at)
     @pending_invitations = Current.family.invitations.pending
+    @breadcrumbs = [
+      [ "Home", root_path ],
+      [ "Profile Info", nil ]
+    ]
   end
 
   def destroy