test(vite-plugin-angular): sweep nested fixtures in the remaining categories

The subdirectory-recursion machinery added for i18n is now applied to
the other six wired categories that also nest fixtures into subfolders:
`r3_view_compiler_bindings`, `_styling`, `_di`, `_directives`,
`r3_view_compiler`, and `r3_compiler_compliance` — 38 nested
TEST_CASES.json files that the flat top-level read was silently
missing.

This surfaces +103 passing conformance checks. It also surfaces 11 new
soft-failures (`value_composition`, `di`, `directives/matching` +
`host_directives`, `template_variables`) — codegen-formatting
differences of the same class as the pre-existing soft-failures, now
tracked rather than invisible. Overall pass rate 91.3%, comfortably
above the 0.75 gate; no hard failures.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: brandonroberts

packages/vite-plugin-angular/src/lib/compiler/conformance.spec.ts

@@ -267,9 +267,17 @@ const CATEGORIES = [
 ];
 
 // Categories whose fixtures are split across subdirectories that the runner
-// descends into. Other wired categories also have nested fixture folders
-// that are not yet swept — wiring those is tracked as separate follow-up.
-const NESTED_CATEGORIES = new Set(['r3_view_compiler_i18n']);
+// descends into. Angular nests related fixtures into subfolders; a flat read
+// of the category's top-level TEST_CASES.json alone would miss them.
+const NESTED_CATEGORIES = new Set([
+  'r3_view_compiler_i18n',
+  'r3_view_compiler_bindings',
+  'r3_view_compiler_styling',
+  'r3_view_compiler_di',
+  'r3_view_compiler_directives',
+  'r3_view_compiler',
+  'r3_compiler_compliance',
+]);
 
 // Categories that only exist (and only compile) on a minimum Angular major.
 // A category gated here still counts as "covered" for the drift detector