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

phpstan-baseline.neon

@@ -6,6 +6,18 @@ parameters:
 			count: 1
 			path: app/src/Controllers/SearchController.php
 
+		-
+			message: '#^Offset ''duration_minutes'' on array\{\}\|array\{license_id\: int\|null, access_type_id\: int\|null, context_note\: string, contact_visible\: int\|null\} on left side of \?\? does not exist\.$#'
+			identifier: nullCoalesce.offset
+			count: 1
+			path: app/src/Controllers/ThesisEditController.php
+
+		-
+			message: '#^Offset ''duration_pages'' on array\{\}\|array\{license_id\: int\|null, access_type_id\: int\|null, context_note\: string, contact_visible\: int\|null\} on left side of \?\? does not exist\.$#'
+			identifier: nullCoalesce.offset
+			count: 1
+			path: app/src/Controllers/ThesisEditController.php
+
 		-
 			message: '#^Property Dispatcher\:\:\$queryParams is never read, only written\.$#'
 			identifier: property.onlyWritten