Add loadOnFocus to initSearchPicker; asset search shows recent by default

initSearchPicker's input handler has always short-circuited on an empty
term -- correct for every existing picker, none of which want results
appearing before anything's typed. The asset picker does want exactly
that (show the last few uploaded images without requiring a search
first), so this adds an opt-in loadOnFocus option instead of changing
the shared default: it fires once when the input gains focus with no
term yet, reusing the same request/render path a real search uses
rather than a separate code path. The AJAX call itself was pulled out
into a named runSearch function so both triggers could share it without
duplicating the success/render logic.

RelatedAssetsController#search now treats a blank term as "show the
most recently created, unattached images" (limit 5) rather than
returning nothing, matching the new client behavior. A real search
term still returns up to 10 name-matched results, unchanged.

1 files changed, 8 insertions, 10 deletions

diff --git a/app/controllers/related_assets_controller.rb b/app/controllers/related_assets_controller.rb
index 906c02c..ae37d2f 100644
--- a/app/controllers/related_assets_controller.rb
+++ b/app/controllers/related_assets_controller.rb
@@ -3,17 +3,15 @@ class RelatedAssetsController < ApplicationController
   before_action :find_node
 
   def search
-    term = params[:q].to_s.strip
-    if term.blank?
-      render json: []
-      return
-    end
-
+    term = params[:search_term].to_s.strip
     attached_ids = @node.editable_page.related_assets.pluck(:asset_id)
-    results = Asset.images
-      .where("name ILIKE ?", "%#{term}%")
-      .where.not(id: attached_ids)
-      .limit(10)
+    scope = Asset.images.where.not(id: attached_ids)
+
+    results = if term.present?
+      scope.where("name ILIKE ?", "%#{term}%").limit(10)
+    else
+      scope.order(created_at: :desc).limit(5)
+    end
 
     render json: results.map { |a|
       { id: a.id, name: a.name, thumb_url: a.upload.url(:thumb) }