feat: Add indexing group to CodexLens environment variable schema

- Introduced a new `indexing` group in the environment variable schema with fields for AST grep usage, static graph enablement, and relationship types.
- Updated the CodexLens configuration to support new indexing features.

feat: Enhance DashboardToolbar with session and fullscreen controls

- Added props for session sidebar visibility and fullscreen mode to the DashboardToolbar component.
- Implemented handlers for toggling session sidebar and fullscreen mode.
- Updated the toolbar layout to include session sidebar toggle and fullscreen button.

refactor: Improve TerminalGrid and TerminalPane components

- Refactored GridGroupRenderer to handle pane size changes directly via store.
- Enhanced TerminalPane to remove unused file browser logic and improve layout handling.
- Updated key generation for child panes to ensure stability.

feat: Extend CodexLens API for staged Stage-2 expansion modes

- Added support for `staged_stage2_mode` in the CodexLens API, allowing for different expansion strategies.
- Updated semantic search handlers to process new stage-2 mode parameter.
- Implemented validation and handling for new stage-2 modes in the backend.

test: Add benchmarks for staged Stage-2 modes comparison

- Created a benchmark script to compare performance and results of different staged Stage-2 modes.
- Included metrics for latency, overlap, and diversity across modes.

ccw/frontend/src/components/codexlens/envVarSchema.ts

@@ -2,7 +2,7 @@
 // CodexLens Environment Variable Schema
 // ========================================
 // TypeScript port of ENV_VAR_GROUPS from codexlens-manager.js
-// Defines the 5 structured groups: embedding, reranker, concurrency, cascade, chunking
+// Defines structured groups for CodexLens configuration
 
 import type { EnvVarGroupsSchema } from '@/types/codexlens';
 
@@ -306,6 +306,36 @@ export const envVarGroupsSchema: EnvVarGroupsSchema = {
       },
     },
   },
+  indexing: {
+    id: 'indexing',
+    labelKey: 'codexlens.envGroup.indexing',
+    icon: 'git-branch',
+    vars: {
+      CODEXLENS_USE_ASTGREP: {
+        key: 'CODEXLENS_USE_ASTGREP',
+        labelKey: 'codexlens.envField.useAstGrep',
+        type: 'checkbox',
+        default: 'false',
+        settingsPath: 'parsing.use_astgrep',
+      },
+      CODEXLENS_STATIC_GRAPH_ENABLED: {
+        key: 'CODEXLENS_STATIC_GRAPH_ENABLED',
+        labelKey: 'codexlens.envField.staticGraphEnabled',
+        type: 'checkbox',
+        default: 'false',
+        settingsPath: 'indexing.static_graph_enabled',
+      },
+      CODEXLENS_STATIC_GRAPH_RELATIONSHIP_TYPES: {
+        key: 'CODEXLENS_STATIC_GRAPH_RELATIONSHIP_TYPES',
+        labelKey: 'codexlens.envField.staticGraphRelationshipTypes',
+        type: 'text',
+        placeholder: 'imports,inherits,calls',
+        default: 'imports,inherits',
+        settingsPath: 'indexing.static_graph_relationship_types',
+        showWhen: (env) => env['CODEXLENS_STATIC_GRAPH_ENABLED'] === 'true',
+      },
+    },
+  },
   chunking: {
     id: 'chunking',
     labelKey: 'codexlens.envGroup.chunking',