feat: Add optimization execution and live results overlay to canvas

Phase 2 - Execution Bridge:
- Update /start endpoint to fallback to generic runner when no study script exists
- Auto-detect model files (.prt, .sim) from 1_setup/model/ directory
- Pass atomizer_spec.json path to generic runner

Phase 3 - Live Monitoring & Results Overlay:
- Add ResultBadge component for displaying values on canvas nodes
- Extend schema with resultValue and isFeasible fields
- Update DesignVarNode, ObjectiveNode, ConstraintNode, ExtractorNode to show results
- Add Run/Stop buttons and Results toggle to SpecRenderer
- Poll /status endpoint every 3s and map best_trial values to nodes
- Show green/red badges for constraint feasibility

atomizer-dashboard/backend/api/routes/optimization.py

@@ -2114,17 +2114,51 @@ async def start_optimization(study_id: str, request: StartOptimizationRequest =
         run_script = study_dir / "run_sat_optimization.py"
         if not run_script.exists():
             run_script = study_dir / "run_optimization.py"
+
+        # Fallback to generic runner if no study script found but spec exists
+        is_generic_runner = False
+        if not run_script.exists() and (study_dir / "atomizer_spec.json").exists():
+            generic_runner = (
+                Path(__file__).parent.parent.parent.parent.parent
+                / "optimization_engine"
+                / "run_optimization.py"
+            )
+            if generic_runner.exists():
+                run_script = generic_runner
+                is_generic_runner = True
+
         if not run_script.exists():
             raise HTTPException(
                 status_code=404, detail=f"No optimization script found for study {study_id}"
             )
 
         # Detect script type and build appropriate command
-        script_type = _detect_script_type(run_script)
+        script_type = (
+            _detect_script_type(run_script) if not is_generic_runner else "generic_universal"
+        )
         python_exe = sys.executable
         cmd = [python_exe, str(run_script)]
 
-        if request:
+        if is_generic_runner:
+            # Configure generic runner arguments
+            cmd.extend(["--config", str(study_dir / "atomizer_spec.json")])
+
+            # Auto-detect PRT and SIM files
+            model_dir = study_dir / "1_setup" / "model"
+            if not model_dir.exists():
+                model_dir = study_dir / "model"
+
+            prt_files = list(model_dir.glob("*.prt"))
+            sim_files = list(model_dir.glob("*.sim"))
+
+            if prt_files:
+                cmd.extend(["--prt", str(prt_files[0])])
+            if sim_files:
+                cmd.extend(["--sim", str(sim_files[0])])
+
+            if request and request.trials:
+                cmd.extend(["--trials", str(request.trials)])
+        elif request:
             if script_type == "sat":
                 # SAT scripts use --trials
                 cmd.extend(["--trials", str(request.trials)])