test: Phase 99 extend next_non_ws to 3 cases (VM+LLVM)

3ケース固定:
- 既存: "  hi" → 2, " \t" → -1
- 新規: "\n\r\tX" → 3 (mixed newline/CR/tab)

VM+LLVM EXE parity完全対応

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/tests/phase96_json_loader_next_non_ws_min.hako

@@ -24,8 +24,9 @@ static box Main {
 
     main() {
         // Input mirrors MiniJsonLoader.next_non_ws
-        print(next_non_ws(" " + " " + "hi")) // expect 2
-        print(next_non_ws(" " + "\t"))       // expect -1
+        print(next_non_ws(" " + " " + "hi"))          // expect 2
+        print(next_non_ws(" " + "\t"))                // expect -1
+        print(next_non_ws("\n" + "\r" + "\t" + "X"))  // expect 3 (mixed newline/CR/tab)
         return "OK"
     }
 }