PHD2 Log upload now supports .txt

frontend/src/components/phd2/PHD2UploadZone.tsx

@@ -104,7 +104,7 @@ export default function PHD2UploadZone({ onUploaded }: Props) {
       <input
         ref={inputRef}
         type="file"
-        accept=".log,.csv"
+        accept=".txt,.log,.csv"
         multiple
         style={{ display: 'none' }}
         onChange={e => handleFiles(e.target.files)}

frontend/src/pages/Stats.tsx

@@ -84,7 +84,7 @@ function PHD2Section() {
         >
           {uploading ? 'Parsing…' : '↑ Upload .log'}
         </div>
-        <input ref={inputRef} type="file" accept=".log,.csv" style={{ display: 'none' }}
+        <input ref={inputRef} type="file" accept=".txt,.log,.csv" style={{ display: 'none' }}
           onChange={e => e.target.files?.[0] && handleFile(e.target.files[0])} />
       </div>
       {uploadResult && (