justfile: standardise test recipes to lint-php/lint-css/lint-js/test + add fix recipe

- Removed ambiguous aliases: phpstan, cs-check (both pointed to lint-php which
  also ran php-cs-fixer, making the names misleading)
- Removed syntax (php -l) — redundant, phpstan already catches parse errors
- Split lint-biome into lint-css and lint-js with correct paths
- Added lint meta-recipe that runs all three linters
- Added fix recipe: biome check --write (CSS/JS format+lint) + php-cs-fixer fix (PHP)
- Updated build-lint to delegate to lint-css + lint-js

justfile

@@ -76,7 +76,8 @@ build-install:
 
 [group('build')]
 build-lint:
-    @npx biome lint app/public/assets/css/ app/public/assets/js/app/ scripts/
+    @just lint-css
+    @just lint-js
 
 [group('build')]
 build-check:
@@ -443,31 +444,35 @@ test-coverage:
     # Generate HTML coverage report in coverage/
     @vendor/bin/phpunit --coverage-html coverage/ tests/phpunit/
 
-[group('test')]
-lint-biome:
-    @biome lint app/public/assets/js/
-
 [group('test')]
 lint-php:
-    # Static analysis + coding standards check
+    # Static analysis (phpstan) + coding standards (php-cs-fixer)
     @vendor/bin/phpstan analyse --memory-limit=512M
     @vendor/bin/php-cs-fixer check --no-interaction
 
 [group('test')]
-cs-fix:
+lint-css:
+    # Lint CSS with biome
+    @npx biome lint app/public/assets/css/
+
+[group('test')]
+lint-js:
+    # Lint JS/build scripts with biome
+    @npx biome lint app/public/assets/js/app/ scripts/
+
+[group('test')]
+lint:
+    # Run all linters
+    @just lint-php
+    @just lint-css
+    @just lint-js
+
+[group('test')]
+fix:
+    # Auto-fix: biome (JS/CSS formatting + lint) + php-cs-fixer (PHP coding standards)
+    @npx biome check --write app/public/assets/css/ app/public/assets/js/app/ scripts/
     @vendor/bin/php-cs-fixer fix --no-interaction
 
-[group('test')]
-phpstan: lint-php
-
-[group('test')]
-cs-check: lint-php
-
-[group('test')]
-syntax:
-    @find app/ -name '*.php' -exec php -l {} \; 2>/dev/null | grep -v 'No syntax errors' || true
-    @echo '✅ Syntax OK'
-
 # ============================================================================
 # Database
 # ============================================================================