feat: Add SIM file introspection journal and enhanced file-type specific UI

- Create introspect_sim.py NX journal to extract solutions, BCs from SIM files
- Update introspect_sim_file() to optionally call NX journal for full introspection
- Add FEM mesh section (nodes, elements, materials, properties) to IntrospectionPanel
- Add SIM solutions and boundary conditions sections to IntrospectionPanel
- Show introspection method and NX errors in panel

atomizer-dashboard/frontend/src/components/canvas/panels/IntrospectionPanel.tsx

@@ -23,6 +23,10 @@ import {
   File,
   Database,
   CheckCircle2,
+  Layers,
+  Grid3x3,
+  Target,
+  Zap,
 } from 'lucide-react';
 import { useCanvasStore } from '../../../hooks/useCanvasStore';
 
@@ -82,6 +86,45 @@ interface ExpressionsResult {
   user_count: number;
 }
 
+// FEM file introspection result (from PyNastran)
+interface FemIntrospection {
+  node_count?: number;
+  element_count?: number;
+  element_types?: Record<string, number>;
+  materials?: Array<{ id: number; type: string; name?: string }>;
+  properties?: Array<{ id: number; type: string; material_id?: number }>;
+  coordinate_systems?: Array<{ id: number; type: string }>;
+  load_sets?: number[];
+  spc_sets?: number[];
+}
+
+// SIM file introspection result (from NX journal)
+interface SimIntrospection {
+  solutions?: Array<{
+    name: string;
+    type?: string;
+    properties?: Record<string, unknown>;
+  }>;
+  boundary_conditions?: {
+    constraints?: Array<{ name: string; type: string }>;
+    loads?: Array<{ name: string; type: string }>;
+    total_count?: number;
+  };
+  tree_structure?: {
+    simulation_objects?: Array<{ pattern: string; type: string; found: boolean }>;
+    found_types?: string[];
+  };
+  loaded_parts?: Array<{ name: string; type: string; leaf?: string }>;
+  part_info?: {
+    name?: string;
+    is_assembly?: boolean;
+    component_count?: number;
+    components?: Array<{ name: string; type: string }>;
+  };
+  introspection_method?: string;
+  nx_error?: string;
+}
+
 interface IntrospectionResult {
   part_file?: string;
   part_path?: string;
@@ -95,7 +138,7 @@ interface IntrospectionResult {
   dependent_files?: DependentFile[];
   extractors_available?: Extractor[];
   warnings?: string[];
-  // Additional fields from NX introspection
+  // Additional fields from NX introspection (PRT files)
   mass_properties?: Record<string, unknown>;
   materials?: Record<string, unknown>;
   bodies?: Record<string, unknown>;
@@ -119,6 +162,18 @@ interface IntrospectionResult {
       op2: string[];
     };
   };
+  // FEM file introspection (from PyNastran)
+  fem?: FemIntrospection;
+  // SIM file introspection (from NX journal)
+  sim?: SimIntrospection;
+  // Additional SIM fields that may be at top level
+  solutions?: SimIntrospection['solutions'];
+  boundary_conditions?: SimIntrospection['boundary_conditions'];
+  tree_structure?: SimIntrospection['tree_structure'];
+  loaded_parts?: SimIntrospection['loaded_parts'];
+  part_info?: SimIntrospection['part_info'];
+  introspection_method?: string;
+  nx_error?: string;
 }
 
 // Baseline run result interface
@@ -165,7 +220,7 @@ export function IntrospectionPanel({ filePath, studyId, onClose }: Introspection
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
   const [expandedSections, setExpandedSections] = useState<Set<string>>(
-    new Set(['expressions', 'extractors', 'file_deps', 'fea_results'])
+    new Set(['expressions', 'extractors', 'file_deps', 'fea_results', 'fem_mesh', 'sim_solutions', 'sim_bcs'])
   );
   const [searchTerm, setSearchTerm] = useState('');
   
@@ -804,6 +859,219 @@ export function IntrospectionPanel({ filePath, studyId, onClose }: Introspection
               </div>
             )}
 
+            {/* FEM Mesh Info Section (for .fem/.afm files) */}
+            {result.fem && (
+              <div className="border border-dark-700 rounded-lg overflow-hidden">
+                <button
+                  onClick={() => toggleSection('fem_mesh')}
+                  className="w-full flex items-center justify-between px-3 py-2 bg-dark-800 hover:bg-dark-750 transition-colors"
+                >
+                  <div className="flex items-center gap-2">
+                    <Grid3x3 size={14} className="text-teal-400" />
+                    <span className="text-sm font-medium text-white">
+                      FEM Mesh ({result.fem.node_count?.toLocaleString() || 0} nodes)
+                    </span>
+                  </div>
+                  {expandedSections.has('fem_mesh') ? (
+                    <ChevronDown size={14} className="text-dark-400" />
+                  ) : (
+                    <ChevronRight size={14} className="text-dark-400" />
+                  )}
+                </button>
+
+                {expandedSections.has('fem_mesh') && (
+                  <div className="p-2 space-y-1">
+                    <div className="flex justify-between p-2 bg-dark-850 rounded text-xs">
+                      <span className="text-dark-400">Nodes</span>
+                      <span className="text-white font-mono">{result.fem.node_count?.toLocaleString() || 0}</span>
+                    </div>
+                    <div className="flex justify-between p-2 bg-dark-850 rounded text-xs">
+                      <span className="text-dark-400">Elements</span>
+                      <span className="text-white font-mono">{result.fem.element_count?.toLocaleString() || 0}</span>
+                    </div>
+                    
+                    {/* Element types breakdown */}
+                    {result.fem.element_types && Object.keys(result.fem.element_types).length > 0 && (
+                      <div className="mt-2">
+                        <p className="text-xs text-dark-500 mb-1">Element Types:</p>
+                        {Object.entries(result.fem.element_types).map(([type, count]) => (
+                          <div key={type} className="flex justify-between p-1.5 bg-dark-800 rounded text-xs mb-0.5">
+                            <span className="text-teal-400 font-mono">{type}</span>
+                            <span className="text-white">{count}</span>
+                          </div>
+                        ))}
+                      </div>
+                    )}
+                    
+                    {/* Materials */}
+                    {result.fem.materials && result.fem.materials.length > 0 && (
+                      <div className="mt-2">
+                        <p className="text-xs text-dark-500 mb-1">Materials ({result.fem.materials.length}):</p>
+                        {result.fem.materials.slice(0, 5).map((mat) => (
+                          <div key={mat.id} className="flex justify-between p-1.5 bg-dark-800 rounded text-xs mb-0.5">
+                            <span className="text-blue-400">ID {mat.id}</span>
+                            <span className="text-white font-mono">{mat.type}</span>
+                          </div>
+                        ))}
+                        {result.fem.materials.length > 5 && (
+                          <p className="text-xs text-dark-500 text-center">+{result.fem.materials.length - 5} more</p>
+                        )}
+                      </div>
+                    )}
+                    
+                    {/* Properties */}
+                    {result.fem.properties && result.fem.properties.length > 0 && (
+                      <div className="mt-2">
+                        <p className="text-xs text-dark-500 mb-1">Properties ({result.fem.properties.length}):</p>
+                        {result.fem.properties.slice(0, 5).map((prop) => (
+                          <div key={prop.id} className="flex justify-between p-1.5 bg-dark-800 rounded text-xs mb-0.5">
+                            <span className="text-amber-400">ID {prop.id}</span>
+                            <span className="text-white font-mono">{prop.type}</span>
+                          </div>
+                        ))}
+                        {result.fem.properties.length > 5 && (
+                          <p className="text-xs text-dark-500 text-center">+{result.fem.properties.length - 5} more</p>
+                        )}
+                      </div>
+                    )}
+                    
+                    {/* Load/SPC sets */}
+                    {(result.fem.load_sets?.length || result.fem.spc_sets?.length) && (
+                      <div className="mt-2 flex gap-2">
+                        {result.fem.load_sets && result.fem.load_sets.length > 0 && (
+                          <div className="flex-1 p-1.5 bg-dark-800 rounded text-xs">
+                            <span className="text-dark-400">Load Sets: </span>
+                            <span className="text-green-400">{result.fem.load_sets.join(', ')}</span>
+                          </div>
+                        )}
+                        {result.fem.spc_sets && result.fem.spc_sets.length > 0 && (
+                          <div className="flex-1 p-1.5 bg-dark-800 rounded text-xs">
+                            <span className="text-dark-400">SPC Sets: </span>
+                            <span className="text-red-400">{result.fem.spc_sets.join(', ')}</span>
+                          </div>
+                        )}
+                      </div>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+
+            {/* SIM Solutions Section (for .sim files) */}
+            {(result.solutions || result.sim?.solutions) && (
+              <div className="border border-dark-700 rounded-lg overflow-hidden">
+                <button
+                  onClick={() => toggleSection('sim_solutions')}
+                  className="w-full flex items-center justify-between px-3 py-2 bg-dark-800 hover:bg-dark-750 transition-colors"
+                >
+                  <div className="flex items-center gap-2">
+                    <Target size={14} className="text-violet-400" />
+                    <span className="text-sm font-medium text-white">
+                      Solutions ({(result.solutions || result.sim?.solutions)?.length || 0})
+                    </span>
+                  </div>
+                  {expandedSections.has('sim_solutions') ? (
+                    <ChevronDown size={14} className="text-dark-400" />
+                  ) : (
+                    <ChevronRight size={14} className="text-dark-400" />
+                  )}
+                </button>
+
+                {expandedSections.has('sim_solutions') && (
+                  <div className="p-2 space-y-1">
+                    {((result.solutions || result.sim?.solutions) || []).map((sol, idx) => (
+                      <div key={idx} className="p-2 bg-dark-850 rounded">
+                        <div className="flex items-center gap-2">
+                          <Zap size={12} className="text-violet-400" />
+                          <span className="text-sm text-white">{sol.name}</span>
+                        </div>
+                        {sol.type && (
+                          <p className="text-xs text-dark-400 mt-1">Type: {sol.type}</p>
+                        )}
+                      </div>
+                    ))}
+                    {(result.solutions || result.sim?.solutions)?.length === 0 && (
+                      <p className="text-xs text-dark-500 text-center py-2">No solutions found</p>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+
+            {/* SIM Boundary Conditions Section */}
+            {(result.boundary_conditions || result.sim?.boundary_conditions) && (
+              <div className="border border-dark-700 rounded-lg overflow-hidden">
+                <button
+                  onClick={() => toggleSection('sim_bcs')}
+                  className="w-full flex items-center justify-between px-3 py-2 bg-dark-800 hover:bg-dark-750 transition-colors"
+                >
+                  <div className="flex items-center gap-2">
+                    <Layers size={14} className="text-rose-400" />
+                    <span className="text-sm font-medium text-white">
+                      Boundary Conditions ({(result.boundary_conditions || result.sim?.boundary_conditions)?.total_count || 0})
+                    </span>
+                  </div>
+                  {expandedSections.has('sim_bcs') ? (
+                    <ChevronDown size={14} className="text-dark-400" />
+                  ) : (
+                    <ChevronRight size={14} className="text-dark-400" />
+                  )}
+                </button>
+
+                {expandedSections.has('sim_bcs') && (
+                  <div className="p-2 space-y-2">
+                    {/* Constraints */}
+                    {(result.boundary_conditions || result.sim?.boundary_conditions)?.constraints && 
+                     (result.boundary_conditions || result.sim?.boundary_conditions)!.constraints!.length > 0 && (
+                      <div>
+                        <p className="text-xs text-dark-500 mb-1">Constraints:</p>
+                        {(result.boundary_conditions || result.sim?.boundary_conditions)!.constraints!.map((bc, idx) => (
+                          <div key={idx} className="flex justify-between p-1.5 bg-dark-800 rounded text-xs mb-0.5">
+                            <span className="text-rose-400">{bc.name}</span>
+                            <span className="text-dark-400">{bc.type}</span>
+                          </div>
+                        ))}
+                      </div>
+                    )}
+                    
+                    {/* Loads */}
+                    {(result.boundary_conditions || result.sim?.boundary_conditions)?.loads && 
+                     (result.boundary_conditions || result.sim?.boundary_conditions)!.loads!.length > 0 && (
+                      <div>
+                        <p className="text-xs text-dark-500 mb-1">Loads:</p>
+                        {(result.boundary_conditions || result.sim?.boundary_conditions)!.loads!.map((load, idx) => (
+                          <div key={idx} className="flex justify-between p-1.5 bg-dark-800 rounded text-xs mb-0.5">
+                            <span className="text-green-400">{load.name}</span>
+                            <span className="text-dark-400">{load.type}</span>
+                          </div>
+                        ))}
+                      </div>
+                    )}
+                    
+                    {(result.boundary_conditions || result.sim?.boundary_conditions)?.total_count === 0 && (
+                      <p className="text-xs text-dark-500 text-center py-2">No boundary conditions found</p>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+
+            {/* SIM Introspection Method Info */}
+            {(result.introspection_method || result.nx_error) && (
+              <div className="p-2 bg-dark-800 rounded-lg text-xs">
+                {result.introspection_method && (
+                  <p className="text-dark-400">
+                    Method: <span className="text-white">{result.introspection_method}</span>
+                  </p>
+                )}
+                {result.nx_error && (
+                  <p className="text-amber-400 mt-1">
+                    NX Error: {result.nx_error}
+                  </p>
+                )}
+              </div>
+            )}
+
             {/* File Dependencies Section (NX file chain) */}
             {result.file_dependencies && (
               <div className="border border-dark-700 rounded-lg overflow-hidden">