Fix code quality violations for publish

Remove unused blade settings pages not linked from UI
Convert remaining frontend pages to SPA actions
Convert settings user_settings and general to SPA actions
Convert settings profile pages to SPA actions
Convert contacts and projects add/edit pages to SPA actions
Convert clients add/edit page to SPA action with loading pattern
Refactor component scoped IDs from $id to $sid
Fix jqhtml comment syntax and implement universal error component system
Update all application code to use new unified error system
Remove all backwards compatibility - unified error system complete
Phase 5: Remove old response classes
Phase 3-4: Ajax response handler sends new format, old helpers deprecated
Phase 2: Add client-side unified error foundation
Phase 1: Add server-side unified error foundation
Add unified Ajax error response system with constants

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

storage-broken/rsx-tmp/babel_cache/17cd00a20e52d42b6030ff5db40df1eb_modern.js

@@ -3,7 +3,7 @@
 class Bulk_Action_Bar extends Component {
   on_ready() {
     // Clear selection on close
-    this.$id('close_btn').on('click', () => {
+    this.$sid('close_btn').on('click', () => {
       this.$.hide();
       // Uncheck all boxes
       const $table = this.$.closest('.card').find('table');