Adjust IDE label truncation in Code Suggestions acceptance by IDE chart

What does this MR do and why?

Reduces y-axis label truncation from 10 to 9 characters to prevent horizontal cutoff.

References

#550064 (comment 2945610310)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Apply the following diff:

diff --git a/ee/app/assets/javascripts/analytics/analytics_dashboards/data_sources/code_suggestions_acceptance_by_ide.js b/ee/app/assets/javascripts/analytics/analytics_dashboards/data_sources/code_suggestions_acceptance_by_ide.js
index e279f1990b72..bdbdb2049604 100644
--- a/ee/app/assets/javascripts/analytics/analytics_dashboards/data_sources/code_suggestions_acceptance_by_ide.js
+++ b/ee/app/assets/javascripts/analytics/analytics_dashboards/data_sources/code_suggestions_acceptance_by_ide.js
@@ -16,6 +16,23 @@ const extractAiMetricsResponse = (result) =>
     resultKey: 'aiMetrics',
   });
 
+/* eslint-disable @gitlab/require-i18n-strings */
+// Mock data for testing long IDE names
+const MOCK_CHART_DATA = [
+  [45, 'Neovim with Language Server Protocol'],
+  [90, 'RubyMine'],
+  [120, 'JetBrains IntelliJ IDEA'],
+  [150, 'Visual Studio Code'],
+];
+
+const MOCK_CONTEXTUAL_DATA = {
+  'Visual Studio Code': { acceptanceRate: 0.75, shownCount: 200 },
+  'JetBrains IntelliJ IDEA': { acceptanceRate: 0.67, shownCount: 180 },
+  RubyMine: { acceptanceRate: 0.64, shownCount: 140 },
+  'Neovim with Language Server Protocol': { acceptanceRate: 0.45, shownCount: 100 },
+};
+/* eslint-enable @gitlab/require-i18n-strings */
+
 const fetchAllCodeSuggestionsIdeMetrics = async (variables) => {
   const rawAiMetricsQueryResult = await defaultClient.query({
     query: AiMetricsQuery,
@@ -123,7 +140,7 @@ export default async function fetch({
 
   const { chartData, contextualData } = extractAcceptanceMetricsByIde(successful);
 
-  if (!chartData.some(([value]) => value)) return {};
+  // if (!chartData.some(([value]) => value)) return {};
 
   setVisualizationOverrides({
     visualizationOptionOverrides: {
@@ -136,7 +153,7 @@ export default async function fetch({
   });
 
   return {
-    [__('Suggestions accepted')]: chartData,
-    contextualData,
+    [__('Suggestions accepted')]: MOCK_CHART_DATA,
+    contextualData: MOCK_CONTEXTUAL_DATA,
   };
 }

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Related to #550064 (closed)