chore: establish clean v0.2 baseline

Include only the working reconstruction prototype with Ollama integration:
- double-wrapping fix (lib/llm/provider.js)
- explicit v0.2 JSON output schema (prompts/reconstruct-v0.2.md)
- Zod validation layer (lib/reconstruction/schema.js)
- shared core analysis path (lib/analysis.js)
- prompt versioning infrastructure (lib/reconstruction/prompt.js)
- provider abstraction
- functioning Ollama provider path
- updated API route with centralized analysis
- UI components displaying v0.2 data and validation errors
- .gitignore rules for generated evaluation artifacts

Exclude: evaluator experiments, diagnostic tests, debug scripts,
generated artifacts, comparison findings, test data tied to evaluator.

components/diagnostics-view.jsx

@@ -10,17 +10,40 @@ const ValidationIndicator = ({ status }) => {
     invalid: "❌ Validation failed",
   };
   return (
-    <div className={`flex items-center gap-2 ${styles[status] || "text-gray-500"}`}>
+    <div
+      className={`flex items-center gap-2 ${styles[status] || "text-gray-500"}`}
+    >
       <span className="font-medium">{labels[status] || status}</span>
     </div>
   );
 };
 
+const validationIcons = {
+  valid: "✅",
+  partial: "⚠️",
+  invalid: "❌",
+};
+
 export default function DiagnosticsView({ result }) {
+  if (!result) return null;
+
   const metrics = [
     { label: "Model", value: result.modelName || "?" },
-    { label: "Duration", value: result.responseDurationMs != null ? `${result.responseDurationMs}ms` : "?" },
-    { label: "Validation", value: <ValidationIndicator status={result.validationStatus || "invalid"} /> },
+    { label: "Provider", value: "Ollama" },
+    { label: "Prompt version", value: result.promptVersion || "?" },
+    {
+      label: "Duration",
+      value:
+        result.responseDurationMs != null
+          ? `${result.responseDurationMs}ms`
+          : "?",
+    },
+    {
+      label: "Validation",
+      value: (
+        <ValidationIndicator status={result.validationStatus || "invalid"} />
+      ),
+    },
   ];
 
   return (
@@ -35,16 +58,32 @@ export default function DiagnosticsView({ result }) {
         ))}
       </dl>
 
+      {/* Collapsed raw output for debugging */}
       {result.rawResponse && (
         <details className="mt-4">
           <summary className="cursor-pointer text-xs text-gray-500 underline hover:text-gray-700">
-            View raw model response
+            View raw model response (
+            {(result.rawResponse?.length || 0).toLocaleString()} chars)
           </summary>
           <pre className="mt-2 max-h-60 overflow-auto rounded bg-gray-900 px-3 py-2 text-xs leading-relaxed text-green-400">
             {result.rawResponse}
           </pre>
         </details>
       )}
+
+      {/* Errors if present */}
+      {result.errors && result.errors.length > 0 && (
+        <details className="mt-3">
+          <summary className="cursor-pointer text-xs text-red-500 underline hover:text-red-700">
+            Validation errors ({result.errors.length})
+          </summary>
+          <ul className="mt-1 space-y-0.5 text-xs text-red-600">
+            {result.errors.map((err, i) => (
+              <li key={i}>{err}</li>
+            ))}
+          </ul>
+        </details>
+      )}
     </div>
   );
 }