chore: cleanup dead code + format with Pint

- Remove unused FeaturesController (empty stubs, no routes)
- Remove ConvertSpatialFile CLI command (unused; service used in LayerManager)
- Remove MigrateGeojsonToFeatures CLI command (one-shot migration, not referenced)
- Remove .claude/worktrees/ (11 old agent worktrees from June)
- Apply Laravel Pint formatting across 219 files (style only, no functional changes)

Tests: 101 passing (319 assertions)
API routes: unchanged (8 routes intact)

app/Http/Middleware/SetLocale.php

@@ -27,7 +27,7 @@ class SetLocale
         }
 
         // 2. From session
-        if (!$locale && Session::has('locale')) {
+        if (! $locale && Session::has('locale')) {
             $sessionLocale = Session::get('locale');
             if (in_array($sessionLocale, $allowedLocales)) {
                 $locale = $sessionLocale;
@@ -35,7 +35,7 @@ class SetLocale
         }
 
         // 3. From browser Accept-Language
-        if (!$locale) {
+        if (! $locale) {
             $browserLang = substr($request->server('HTTP_ACCEPT_LANGUAGE', 'en'), 0, 2);
             if (in_array($browserLang, $allowedLocales)) {
                 $locale = $browserLang;
@@ -43,7 +43,7 @@ class SetLocale
         }
 
         // 4. Default to app locale
-        if (!$locale) {
+        if (! $locale) {
             $locale = config('app.locale', 'en');
         }
 
@@ -52,4 +52,4 @@ class SetLocale
 
         return $next($request);
     }
-}
+}