feat(core): implement tool preselection to reduce context size

- Created ToolPreselectionService using the classifier model to select only relevant tools for a given prompt.
- Integrated pre-selection into LocalAgentExecutor and GeminiClient to automatically filter the tool registry.
- Added `general.toolPreselection` toggle in configuration (enabled by default).
- Added comprehensive unit tests and an E2E scenario confirming accurate tool reduction without loss of function.
- Fixes #17113

packages/cli/src/config/settingsSchema.ts

@@ -286,6 +286,16 @@ const SETTINGS_SCHEMA = {
           'Retry on "exception TypeError: fetch failed sending request" errors.',
         showInDialog: false,
       },
+      toolPreselection: {
+        type: 'boolean',
+        label: 'Tool Preselection',
+        category: 'General',
+        requiresRestart: false,
+        default: true,
+        description:
+          'Exclude unneeded tools from context to save tokens and improve performance.',
+        showInDialog: true,
+      },
       debugKeystrokeLogging: {
         type: 'boolean',
         label: 'Debug Keystroke Logging',

packages/cli/src/ui/components/__snapshots__/InputPrompt.test.tsx.snap

@@ -78,6 +78,13 @@ exports[`InputPrompt > mouse interaction > should toggle paste expansion on doub
 "
 `;
 
+exports[`InputPrompt > mouse interaction > should toggle paste expansion on double-click 4`] = `
+"▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
+ > [Pasted Text: 10 lines]
+▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
+"
+`;
+
 exports[`InputPrompt > snapshots > should not show inverted cursor when shell is focused 1`] = `
 "▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
  >   Type your message or @path/to/file