feat: Add Studio UI, intake system, and extractor improvements

Dashboard:
- Add Studio page with drag-drop model upload and Claude chat
- Add intake system for study creation workflow
- Improve session manager and context builder
- Add intake API routes and frontend components

Optimization Engine:
- Add CLI module for command-line operations
- Add intake module for study preprocessing
- Add validation module with gate checks
- Improve Zernike extractor documentation
- Update spec models with better validation
- Enhance solve_simulation robustness

Documentation:
- Add ATOMIZER_STUDIO.md planning doc
- Add ATOMIZER_UX_SYSTEM.md for UX patterns
- Update extractor library docs
- Add study-readme-generator skill

Tools:
- Add test scripts for extraction validation
- Add Zernike recentering test

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

optimization_engine/validation/__init__.py

@@ -0,0 +1,31 @@
+"""
+Atomizer Validation System
+==========================
+
+Validates study configuration before optimization starts.
+
+Components:
+- ValidationGate: Main orchestrator for validation
+- SpecChecker: Validates atomizer_spec.json
+- TestTrialRunner: Runs 2-3 test trials to verify setup
+
+Usage:
+    from optimization_engine.validation import ValidationGate
+
+    gate = ValidationGate(study_dir)
+    result = gate.validate(run_test_trials=True)
+
+    if result.passed:
+        gate.approve()  # Start optimization
+"""
+
+from .gate import ValidationGate, ValidationResult, TestTrialResult
+from .checker import SpecChecker, ValidationIssue
+
+__all__ = [
+    "ValidationGate",
+    "ValidationResult",
+    "TestTrialResult",
+    "SpecChecker",
+    "ValidationIssue",
+]