Make color recognition more specific (#8824)

Fixes #7184

To manually test, check that the sample code with a non-color does not
generate a color box:

<img width="236" height="268" alt="Screenshot 2026-02-24 at 9 29 04 AM"
src="https://github.com/user-attachments/assets/5f678813-b07c-4846-be35-ff5b72dc86ce"
/>

(`TestEnum.blue` has no color box, but `Colors.blue` does)

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Phil Quitslund <pq@users.noreply.github.com>

Author: 3 people

src/io/flutter/editor/FlutterColorProvider.java

@@ -45,6 +45,9 @@ public Color getColorFrom(@NotNull PsiElement element) {
 
     if (parent.getNode().getElementType() == DartTokenTypes.ARRAY_ACCESS_EXPRESSION) {
       // Colors.blue[200]
+      if (!refExpr.getFirstChild().getText().equals("Colors") && !refExpr.getFirstChild().getText().equals("CupertinoColors")) {
+        return null;
+      }
       if (name.equals(refExpr.getFirstChild().getText()) && refExpr.getChildren().length > 1) {
         // Avoid duplicate resolves.
         return null;
@@ -116,7 +119,7 @@ else if (parent.getNode().getElementType() == DartTokenTypes.SIMPLE_TYPE) {
       // name.equals(refExpr.getFirstChild().getText()) -> Colors.blue
       final PsiElement idNode = refExpr.getFirstChild();
       if (idNode == null) return null;
-      if (name.equals(idNode.getText())) {
+      if ((name.equals("Colors") || name.equals("CupertinoColors")) && name.equals(idNode.getText())) {
         final PsiElement selectorNode = refExpr.getLastChild();
         if (selectorNode == null) return null;
         final String code = AstBufferUtil.getTextSkippingWhitespaceComments(selectorNode.getNode());