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

scripts/build-css.mjs

@@ -1,4 +1,5 @@
 #!/usr/bin/env node
+
 /**
  * Build CSS bundles with Lightning CSS.
  *
@@ -13,10 +14,10 @@
  * Output: app/public/assets/dist/
  */
 
-import { bundleAsync } from "lightningcss";
-import { readFileSync, writeFileSync, mkdirSync } from "node:fs";
-import { resolve, dirname, basename } from "node:path";
+import { mkdirSync, readFileSync, writeFileSync } from "node:fs";
+import { dirname, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
+import { bundleAsync } from "lightningcss";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 const root = resolve(__dirname, "..");