fix IDEs tab bug (#59365)

Author: sunbrye

content/copilot/reference/copilot-feature-matrix.md

@@ -26,10 +26,20 @@ topics:
 
 The following table shows supported {% data variables.product.prodname_copilot_short %} features in the latest version of each IDE.
 
+{%- comment %}
+This loop generates the "Features by IDE" comparison table:
+- Outer loop: Iterates through each feature from VS Code's feature list (using VS Code as the canonical source)
+- Inner loop: For each feature, iterates through all IDEs to check support in their latest version
+  - Gets the latest version using ideEntry[1].versions | first
+  - Looks up the support level for that feature in that version
+  - Outputs ✓ (supported), P (preview), or ✗ (not supported)
+Example row: | Agent mode | ✓ | ✓ | P | ✗ | ... |
+{%- endcomment %}
+
 | Feature{%- for entry in tables.copilot.copilot-matrix.ides %} | {{ entry[0] }}{%- endfor %} |
 |:----{%- for entry in tables.copilot.copilot-matrix.ides %}|:----:{%- endfor %}|
 {%- for featureEntry in tables.copilot.copilot-matrix.ides["VS Code"].features %}
-| {{ featureEntry[0] }}{%- for ideEntry in tables.copilot.copilot-matrix.ides %}{%- assign latestVersion = ideEntry[1].versions | last %}{%- assign supportLevel = ideEntry[1].features[featureEntry[0]][latestVersion] %} | {%- case supportLevel -%}{%- when "supported" %}✓{%- when "preview" %}P{%- else %}✗{%- endcase -%}{%- endfor %} |
+| {{ featureEntry[0] }}{%- for ideEntry in tables.copilot.copilot-matrix.ides %}{%- assign latestVersion = ideEntry[1].versions | first %}{%- assign supportLevel = ideEntry[1].features[featureEntry[0]][latestVersion] %} | {%- case supportLevel -%}{%- when "supported" %}✓{%- when "preview" %}P{%- else %}✗{%- endcase -%}{%- endfor %} |
 {%- endfor %}
 
 {% endides %}