Phase 3.3: Multi-objective optimization fix, updated docs & Claude skill

- Fixed drone gimbal optimization to use proper semantic directions
- Changed from ['minimize', 'minimize'] to ['minimize', 'maximize']
- Updated Claude skill (v2.0) with Phase 3.3 integration
- Added centralized extractor library documentation
- Added multi-objective optimization (Protocol 11) section
- Added NX multi-solution protocol documentation
- Added dashboard integration documentation
- Fixed Pareto front degenerate issue with proper NSGA-II configuration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,46 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+### Phase 3.3 - Dashboard & Multi-Solution Support (November 23, 2025)
+
+#### Added
+- **React Dashboard** with comprehensive multi-objective visualization
+  - Parallel Coordinates Plot with research-based design
+    - Light theme with high-visibility colors (white background, dark text)
+    - Interactive trial selection and highlighting
+    - Color-coded axes: Design Variables (blue) → Objectives (green) → Constraints (yellow)
+    - Automatic constraint extraction from trial user_attrs
+    - Support for units display (mm, MPa, Hz, g, etc.)
+  - Pareto Front scatter plot for multi-objective optimization
+  - Real-time WebSocket updates for live monitoring
+  - FastAPI backend (port 8000) with Vite frontend (port 3003)
+  - Optimizer Strategy Panel showing algorithm info and metrics
+  - Comprehensive dashboard documentation: [DASHBOARD.md](docs/DASHBOARD.md)
+
+- **NX Multi-Solution Protocol** documentation
+  - Critical fix for multi-solution workflows documented
+  - Best practices for static + modal, thermal + structural simulations
+  - [NX_MULTI_SOLUTION_PROTOCOL.md](docs/NX_MULTI_SOLUTION_PROTOCOL.md)
+
+- **Centralized Extractor Library**
+  - `optimization_engine/extractors/` with base classes
+  - Eliminates code duplication across studies
+  - Unified error handling and OP2 file processing
+
+#### Changed
+- **CRITICAL FIX**: Multi-solution NX workflows now use `SolveAllSolutions()` API
+  - Ensures all solutions (static + modal, etc.) complete before returning
+  - Uses Foreground mode for reliable multi-solution solves
+  - Prevents stale OP2 files and identical results across trials
+  - Implementation in `optimization_engine/solve_simulation.py` lines 271-295
+
+#### Fixed
+- Multi-solution NX simulations only solving first solution
+- Parallel coordinates plot crashes due to undefined axis labels
+- Dashboard page crashes from missing data validation
+- Identical frequency values across trials in multi-solution studies
+- NaN values in constraint visualization
+
 ### Phase 3.2 - Integration & NX Enhancements (In Progress)
 
 #### Added