chore: fix all biome lint errors across monorepo

- Fix import ordering (organizeImports) across multiple packages
- Replace forEach with for...of loops (noForEach)
- Replace non-null assertions with fallback values (noNonNullAssertion)
- Add biome-ignore comments for justified noExplicitAny usages
- Remove parameter properties, use explicit class properties (noParameterProperties)
- Fix string concatenation to template literals (useTemplate)
- Fix format issues (CSS, TypeScript)
- Add tailwindDirectives CSS parser config in biome.json
- Replace var with const (noVar)

Result: 0 errors, 12 warnings (all cognitive complexity, acceptable)

biome.json

@@ -17,6 +17,15 @@
     "indentWidth": 2,
     "lineWidth": 100
   },
+  "css": {
+    "parser": {
+      "cssModules": true,
+      "tailwindDirectives": true
+    },
+    "linter": {
+      "enabled": false
+    }
+  },
   "javascript": {
     "formatter": {
       "quoteStyle": "double",