feat(cli): invert context window display to show usage (#20071)

Co-authored-by: jacob314 <jacob314@gmail.com>

packages/cli/src/config/settingsSchema.ts

@@ -117,6 +117,10 @@ export interface SettingDefinition {
    * For map-like objects without explicit `properties`, describes the shape of the values.
    */
   additionalProperties?: SettingCollectionDefinition;
+  /**
+   * Optional unit to display after the value (e.g. '%').
+   */
+  unit?: string;
   /**
    * Optional reference identifier for generators that emit a `$ref`.
    */
@@ -595,7 +599,7 @@ const SETTINGS_SCHEMA = {
             category: 'UI',
             requiresRestart: false,
             default: true,
-            description: 'Hides the context window remaining percentage.',
+            description: 'Hides the context window usage percentage.',
             showInDialog: true,
           },
         },
@@ -913,13 +917,14 @@ const SETTINGS_SCHEMA = {
       },
       compressionThreshold: {
         type: 'number',
-        label: 'Compression Threshold',
+        label: 'Context Compression Threshold',
         category: 'Model',
         requiresRestart: true,
         default: 0.5 as number,
         description:
           'The fraction of context usage at which to trigger context compression (e.g. 0.2, 0.3).',
         showInDialog: true,
+        unit: '%',
       },
       disableLoopDetection: {
         type: 'boolean',