Fix S121 missing curly braces in S6775 decorator

Add curly braces to 4 single-statement if blocks in decorator.ts
to comply with S121 (Expected { after 'if' condition). These were
flagged by SonarQube external analysis. No functional changes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Vibe Bot

packages/.sonar-analysis/external-issues.json

@@ -0,0 +1,50 @@
+[
+  {
+    "rule": "typescript:S121",
+    "component": "org.sonarsource.javascript:javascript:packages/jsts/src/rules/S6775/decorator.ts",
+    "line": 263,
+    "message": "Expected { after 'if' condition.",
+    "textRange": {
+      "startLine": 263,
+      "endLine": 263,
+      "startOffset": 50,
+      "endOffset": 59
+    }
+  },
+  {
+    "rule": "typescript:S121",
+    "component": "org.sonarsource.javascript:javascript:packages/jsts/src/rules/S6775/decorator.ts",
+    "line": 284,
+    "message": "Expected { after 'if' condition.",
+    "textRange": {
+      "startLine": 284,
+      "endLine": 284,
+      "startOffset": 21,
+      "endOffset": 38
+    }
+  },
+  {
+    "rule": "typescript:S121",
+    "component": "org.sonarsource.javascript:javascript:packages/jsts/src/rules/S6775/decorator.ts",
+    "line": 363,
+    "message": "Expected { after 'if' condition.",
+    "textRange": {
+      "startLine": 363,
+      "endLine": 363,
+      "startOffset": 19,
+      "endOffset": 36
+    }
+  },
+  {
+    "rule": "typescript:S121",
+    "component": "org.sonarsource.javascript:javascript:packages/jsts/src/rules/S6775/decorator.ts",
+    "line": 376,
+    "message": "Expected { after 'if' condition.",
+    "textRange": {
+      "startLine": 376,
+      "endLine": 376,
+      "startOffset": 19,
+      "endOffset": 36
+    }
+  }
+]

packages/jsts/src/rules/S6775/decorator.ts

@@ -260,7 +260,9 @@ function findExternalPropTypes(
 
   // Search for ComponentName.propTypes = {...}
   for (const statement of program.body) {
-    if (statement.type !== 'ExpressionStatement') continue;
+    if (statement.type !== 'ExpressionStatement') {
+      continue;
+    }
 
     const expr = statement.expression;
     if (
@@ -281,7 +283,9 @@ function findExternalPropTypes(
     const classInfo = extractClassDeclaration(statement);
     if (classInfo && classInfo.id?.name === componentName) {
       const propTypes = findStaticPropTypes(classInfo.body);
-      if (propTypes) return propTypes;
+      if (propTypes) {
+        return propTypes;
+      }
     }
   }
 
@@ -360,7 +364,9 @@ function findPropTypesInStatement(
   /* istanbul ignore next - Factory function pattern rare in practice */
   if (statement.type === 'FunctionDeclaration' && statement.body) {
     const propTypes = findPropTypesInFunctionBody(statement.body, defaultPropsConstantName);
-    if (propTypes) return propTypes;
+    if (propTypes) {
+      return propTypes;
+    }
   }
 
   // Check for exported functions
@@ -373,7 +379,9 @@ function findPropTypesInStatement(
       statement.declaration.body,
       defaultPropsConstantName,
     );
-    if (propTypes) return propTypes;
+    if (propTypes) {
+      return propTypes;
+    }
   }
 
   return null;