[Enhancement] Forums (re-run): Forum 'Topic templates' textareas in settings have no AI wand

Area: Forums (re-run) (audit p2r) · Surface: /forums/{slug}/settings — templates tab (ForumSettingsController@show) · Dimension: Law 8 — AI wand coverage · Severity: enhancement

The topic-template editor asks moderators to hand-write starter scaffolds for question/announcement/showcase posts. This is exactly the kind of content-generation config where the established `✦ AI` wand fits — generate a sensible starter template from the forum's purpose. Every other forum content surface (titles, category descriptions, rules seed) already has AI assistance.

Evidence

platform/templates/forums/settings.php:201-213 renders three content-generation textareas (template_question, template_announcement, template_showcase) with a char counter but no AI affordance. By contrast create-thread.php:89-99 already ships `✦ AI title` wands (`data-ai-feature="ai_forum_title_polish"`), and AdminAIController already exposes forum content generation (`forumCategoryDesc`, `forumRulesSeed` at AdminAIController.php:26,44). The wand pattern is established for forums but absent here.

Suggested fix. Add a gated `✦ AI` wand next to each topic-template textarea that drafts a starter template, reusing the `data-ai-feature` wand pattern from create-thread.php and a new gated feature key registered at /admin/ai.

Filed by the automated tenant-app audit and adversarially evidence-verified. Status: verified. Open — not yet actioned.