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/src/core/routes/codexlens/semantic-handlers.ts

@@ -1187,6 +1187,7 @@ except Exception as e:
         path: projectPath,
         mode = 'fusion',
         fusion_strategy = 'rrf',
+        staged_stage2_mode,
         vector_weight = 0.5,
         structural_weight = 0.3,
         keyword_weight = 0.2,
@@ -1198,6 +1199,7 @@ except Exception as e:
         path?: unknown;
         mode?: unknown;
         fusion_strategy?: unknown;
+        staged_stage2_mode?: unknown;
         vector_weight?: unknown;
         structural_weight?: unknown;
         keyword_weight?: unknown;
@@ -1215,6 +1217,23 @@ except Exception as e:
       const resolvedMode = typeof mode === 'string' && ['fusion', 'vector', 'structural'].includes(mode) ? mode : 'fusion';
       const resolvedStrategy = typeof fusion_strategy === 'string' &&
         ['rrf', 'staged', 'binary', 'hybrid', 'dense_rerank'].includes(fusion_strategy) ? fusion_strategy : 'rrf';
+      let resolvedStage2Mode: 'precomputed' | 'realtime' | 'static_global_graph' | undefined;
+      if (resolvedStrategy === 'staged' && typeof staged_stage2_mode === 'string') {
+        const stage2 = staged_stage2_mode.trim().toLowerCase();
+        if (stage2.length > 0) {
+          if (stage2 === 'live') {
+            resolvedStage2Mode = 'realtime';
+          } else if (stage2 === 'precomputed' || stage2 === 'realtime' || stage2 === 'static_global_graph') {
+            resolvedStage2Mode = stage2;
+          } else {
+            return {
+              success: false,
+              error: `Invalid staged_stage2_mode: ${stage2}. Must be one of: precomputed, realtime, static_global_graph`,
+              status: 400,
+            };
+          }
+        }
+      }
       const resolvedVectorWeight = typeof vector_weight === 'number' ? vector_weight : 0.5;
       const resolvedStructuralWeight = typeof structural_weight === 'number' ? structural_weight : 0.3;
       const resolvedKeywordWeight = typeof keyword_weight === 'number' ? keyword_weight : 0.2;
@@ -1234,6 +1253,10 @@ except Exception as e:
         include_match_reason: resolvedIncludeReason,
       };
 
+      if (resolvedStage2Mode) {
+        apiArgs.staged_stage2_mode = resolvedStage2Mode;
+      }
+
       if (Array.isArray(kind_filter) && kind_filter.length > 0) {
         apiArgs.kind_filter = kind_filter;
       }