One actions_menu helper now builds the three-dot toggle and dropdown for
seeds, harvests, crops, gardens, posts, photos, activities and comments,
replacing the text "Actions" toggle. Every item carries a green line icon
(menu_icon), and delete uses a darker red ($danger-text, 5.6:1 on white)
so it stays readable; it is still last, under a divider, with its own icon.
The React menus draw the same icons. DESIGN.md now says menu items have icons.
Also fixes the posts menu delete, which confirmed but never sent DELETE.
Closes#4939Closes#4940Closes#4942Closes#4943Closes#4944Closes#4945Closes#4946
Part of #4933
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
