feat: 支持标准 URL 格式

src/main/java/org/jcnc/snow/compiler/lexer/core/LexerEngine.java

@@ -37,7 +37,7 @@ public class LexerEngine {
      * @param sourceName 文件名（诊断用）
      */
     public LexerEngine(String source, String sourceName) {
-        this.absPath = new File(sourceName).getAbsolutePath();
+        this.absPath = new File(sourceName).getAbsolutePath().replace('\\', '/');
         this.context = new LexerContext(source);
         this.scanners = List.of(
                 new WhitespaceTokenScanner(),

src/main/java/org/jcnc/snow/compiler/lexer/core/LexicalError.java

@@ -50,6 +50,6 @@ public class LexicalError {
      */
     @Override
     public String toString() {
-        return file + ":" + line + ":" + column + ": " + message;
+        return "file:///" + file + ":" + line + ":" + column + ": " + message;
     }
 }

src/main/java/org/jcnc/snow/compiler/parser/context/ParseError.java

@@ -40,6 +40,6 @@ public class ParseError {
      */
     @Override
     public String toString() {
-        return file + ":" + line + ":" + column + ": " + message;
+        return "file:///" + file + ":" + line + ":" + column + ": " + message;
     }
 }

src/main/java/org/jcnc/snow/compiler/parser/context/ParserContext.java

@@ -39,7 +39,7 @@ public class ParserContext {
      */
     public ParserContext(List<Token> tokens, String sourceName) {
         this.tokens = new TokenStream(tokens);
-        this.sourceName = Paths.get(sourceName).toAbsolutePath().toString();
+        this.sourceName = Paths.get(sourceName).toAbsolutePath().toString().replace('\\', '/');
     }
 
 

src/main/java/org/jcnc/snow/compiler/semantic/error/SemanticError.java

@@ -48,7 +48,7 @@ public record SemanticError(Node node, String message) {
         }
 
 
-        StringBuilder sb = new StringBuilder();
+        StringBuilder sb = new StringBuilder("file:///");
         if (file != null && !file.isBlank()) sb.append(file).append(":");
         sb.append((line >= 0 && col >= 0) ? line + ":" + col : "未知位置");
         sb.append(": ").append(message);