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

- Removed ambiguous aliases: phpstan, cs-check, syntax
- Split lint-biome into lint-css and lint-js with correct paths
- Added lint meta-recipe and fix recipe (biome --unsafe + php-cs-fixer)
- Fixed FormBootstrap dead null check, CSS shorthand override bug
- Updated phpstan baseline, suppressed noDescendingSpecificity/noInnerDeclarations
- Applied ~74 biome auto-fixes across CSS/JS

app/public/assets/css/components/links.css

@@ -4,12 +4,12 @@
    ============================================================ */
 
 a {
-  color: inherit;
-  text-decoration: none;
-  font-weight: 400;
+	color: inherit;
+	text-decoration: none;
+	font-weight: 400;
 }
 
 a:hover {
-  color: var(--accent-primary);
-  text-decoration: none;
+	color: var(--accent-primary);
+	text-decoration: none;
 }