Address code review feedback - improve comments and code quality

Fixed several issues identified in automated code review:

1. Fixed comment numbering: Changed "6) Build delta-encoded data" to "7)" as it's the 7th step
2. Improved comment accuracy for SemanticTokenTypes.Type - clarified it's for type names (identifiers of types)
3. Updated comment for SemanticTokenTypes.Class - clarified it's for metadata object names (e.g., Контрагенты, Валюты), not metadata types
4. Improved ambiguous identifier comment in visitColumn - explained single identifiers are intentionally treated as variables because distinguishing requires symbol resolution not performed in visitor
5. Clarified newline handling comment in test - explained that merged multiline token length is sum of lines without newlines
6. Better explained emptyRef variable name - matches grammar field 'emptyFer' (typo in grammar for 'emptyRef')

Note: Did NOT remove SemanticTokenTypes.Type from legend as it may be used by future extensions
Note: Did NOT extract duplicate SDBL token collection code as contexts differ (collection vs processing)
Note: Did NOT change multi-line range handling as SDBL contexts are always single-line
Note: Did NOT change middle identifier handling as SDBL doesn't support 3-part column references

All changes improve code documentation and clarity without changing functionality.
All 27 tests passing.

Co-authored-by: nixel2007 <[email protected]>

Author: Copilot

src/main/java/com/github/_1c_syntax/bsl/languageserver/providers/SemanticTokensProvider.java

@@ -241,7 +241,7 @@ public SemanticTokens getSemanticTokensFull(DocumentContext documentContext, @Su
     // 6) Add SDBL tokens and split string parts
     addSdblTokens(documentContext, entries, stringsToSkip);
 
-    // 6) Build delta-encoded data
+    // 7) Build delta-encoded data
     List<Integer> data = toDeltaEncoded(entries);
     return new SemanticTokens(data);
   }
@@ -1131,8 +1131,10 @@ public Void visitColumn(SDBLParser.ColumnContext ctx) {
       var identifiers = ctx.identifier();
       if (identifiers != null && !identifiers.isEmpty()) {
         if (identifiers.size() == 1) {
-          // Single identifier - could be alias or field
-          // Context-dependent, treat as variable for now
+          // Single identifier: in SDBL it may represent either a table alias or a field name.
+          // We intentionally highlight such ambiguous identifiers as "variable" for now,
+          // because distinguishing alias vs. field here would require deeper symbol resolution
+          // that is not performed in this visitor.
           provider.addSdblTokenRange(entries, identifiers.get(0).getStart(), SemanticTokenTypes.Variable);
         } else if (identifiers.size() >= 2) {
           // First identifier → Variable (table alias)
@@ -1175,7 +1177,7 @@ public Void visitValueFunction(SDBLParser.ValueFunctionContext ctx) {
       var type = ctx.type;
       var mdoName = ctx.mdoName;
       var predefinedName = ctx.predefinedName;
-      var emptyRef = ctx.emptyFer; // Note: grammar has typo "emptyFer" instead of "emptyRef"
+      var emptyRef = ctx.emptyFer; // Note: variable name matches grammar field 'emptyFer' (typo in grammar for 'emptyRef')
       var systemName = ctx.systemName;
 
       if (type != null && mdoName != null) {

src/main/java/com/github/_1c_syntax/bsl/languageserver/semantictokens/SemanticTokensLegendConfiguration.java

@@ -59,9 +59,9 @@ public SemanticTokensLegend semanticTokensLegend() {
       SemanticTokenTypes.Decorator,
       SemanticTokenTypes.Operator,
       SemanticTokenTypes.Namespace,
-      SemanticTokenTypes.Type,  // Added for general type references
+      SemanticTokenTypes.Type,  // Standard LSP token type for type names (identifiers of types)
       SemanticTokenTypes.Property,  // Added for SDBL field names
-      SemanticTokenTypes.Class,  // Added for SDBL metadata types (Справочник, РегистрСведений, etc.)
+      SemanticTokenTypes.Class,  // Added for SDBL metadata object names (e.g. Справочник.Контрагенты, РегистрСведений.КурсыВалют)
       SemanticTokenTypes.Enum,  // Added for SDBL enum types (Перечисление.Пол)
       SemanticTokenTypes.EnumMember  // Added for predefined elements and enum values
     );

src/test/java/com/github/_1c_syntax/bsl/languageserver/providers/SemanticTokensProviderTest.java

@@ -437,10 +437,11 @@ void multilineDocumentation_mergedWhenSupported() {
 
     // When multiline support is enabled, documentation comments should be merged into one token
     // The merged token starts on line 0 and spans across lines
-    // Both lines "// Первая строка описания" (26 chars) + "// Вторая строка описания" (25 chars) = 51 chars total
+    // Both lines "// Первая строка описания" (26 chars) + "// Вторая строка описания" (25 chars) = 51 chars total,
+    // i.e. the sum of the characters of both lines; the newline between them is not included in the length.
     // Body comment on line 3 should NOT have Documentation modifier
     var expected = List.of(
-      // Merged documentation comment (starts at line 0, length is sum of both lines)
+      // Merged documentation comment (starts at line 0, length is sum of both lines without the newline)
       new ExpectedToken(0, 0, 51, SemanticTokenTypes.Comment, SemanticTokenModifiers.Documentation, "// Первая+Вторая строка описания"),
       // Body comment without documentation modifier
       new ExpectedToken(3, 2, 18, SemanticTokenTypes.Comment, "// не документация")