refactor(js): move icons-page.js to dev_tools module

icons-page.js is a dev tool for browsing available icons, so it
belongs in dev_tools alongside testing-*.js and code-quality-*.js.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/dev_tools/static/admin/js/icons-page.js

@@ -1,4 +1,4 @@
-// static/admin/js/icons-page.js
+// app/modules/dev_tools/static/admin/js/icons-page.js
 
 // ✅ Use centralized logger - ONE LINE!
 // Create custom logger since icons page is not pre-configured

app/templates/admin/icons.html

@@ -318,5 +318,5 @@
 
 {% block extra_scripts %}
 {# ✅ CRITICAL: Load JavaScript file #}
-<script src="{{ url_for('static', path='admin/js/icons-page.js') }}"></script>
+<script src="{{ url_for('dev_tools_static', path='admin/js/icons-page.js') }}"></script>
 {% endblock %}

docs/architecture/frontend-structure.md

@@ -337,7 +337,7 @@ app.mount("/static/modules/orders", StaticFiles(directory="app/modules/orders/st
 | **messaging** | messages.js, notifications.js, email-templates.js | messages.js, notifications.js, email-templates.js | - |
 | **marketplace** | marketplace*.js, letzshop*.js | letzshop.js, marketplace.js, onboarding.js | - |
 | **monitoring** | monitoring.js, background-tasks.js, imports.js, logs.js | - | - |
-| **dev_tools** | testing-*.js, code-quality-*.js | - | - |
+| **dev_tools** | testing-*.js, code-quality-*.js, icons-page.js | - | - |
 | **cms** | content-pages.js, content-page-edit.js | content-pages.js, content-page-edit.js | - |
 | **analytics** | - | analytics.js | - |
 
@@ -354,7 +354,7 @@ These files remain in `static/` because they're platform-level, not module-speci
 - `companies.js`, `company-*.js` - Company management (3 files)
 - `admin-users.js`, `admin-user-*.js` - Admin user management (3 files)
 - `users.js`, `user-*.js` - Platform user management (4 files)
-- `settings.js`, `components.js`, `icons-page.js` - Platform utilities
+- `settings.js`, `components.js` - Platform utilities
 
 **Vendor Core (`static/vendor/js/`):**
 - `init-alpine.js` - Vendor layout initialization