feat(recipe-studio): enforce run name validation for full runs and refine validation UI

studio/frontend/src/features/recipe-studio/dialogs/preview-dialog.tsx

@@ -254,6 +254,8 @@ export function RunDialog({
 }: RunDialogProps): ReactElement {
   const [advancedOpen, setAdvancedOpen] = useState(false);
   const kindLabel = kind === "preview" ? "Preview" : "Full run";
+  const normalizedFullRunName = fullRunName.trim();
+  const isFullRunNameMissing = kind === "full" && normalizedFullRunName.length === 0;
   const rowHint =
     kind === "preview"
       ? "How many sample rows to generate for a quick check."
@@ -376,7 +378,13 @@ export function RunDialog({
               value={fullRunName}
               onChange={(event) => onFullRunNameChange(event.target.value)}
               placeholder="Sprint dataset v2"
+              aria-invalid={isFullRunNameMissing}
             />
+            {isFullRunNameMissing ? (
+              <p className="text-xs text-destructive">
+                Run name is required before starting a full run.
+              </p>
+            ) : null}
           </div>
         )}
 
@@ -657,7 +665,12 @@ export function RunDialog({
             <HugeiconsIcon icon={TestTube01Icon} className="size-3.5" />
             {validateLoading ? "Validating..." : "Validate recipe"}
           </Button>
-          <Button type="button" onClick={onRun} disabled={loading} className="corner-squircle">
+          <Button
+            type="button"
+            onClick={onRun}
+            disabled={loading || isFullRunNameMissing}
+            className="corner-squircle"
+          >
             <HugeiconsIcon icon={CookBookIcon} className="size-3.5" />
             {loading ? "Starting..." : `Start ${kindLabel.toLowerCase()}`}
           </Button>

studio/frontend/src/features/recipe-studio/hooks/use-recipe-executions.ts

@@ -324,19 +324,26 @@ export function useRecipeExecutions({
       rows: number,
       runName: string | null,
     ): Promise<boolean> => {
+      const trimmedRunName = typeof runName === "string" ? runName.trim() : "";
+      if (kind === "full" && !trimmedRunName) {
+        const message = "Run name required for full runs.";
+        setRunErrors([message]);
+        toastError("Run name required", message);
+        return false;
+      }
+
       const payload = readExecutablePayload();
       if (!payload) {
         return false;
       }
 
       const normalizedRows = sanitizeExecutionRows(rows, kind);
-      const normalizedRunName = kind === "full" ? normalizeRunName(runName) : null;
       const executionPayload = buildExecutionPayload({
         payload,
         kind,
         rows: normalizedRows,
         settings: runSettings,
-        runName: normalizedRunName,
+        runName,
       });
 
       try {
@@ -361,7 +368,7 @@ export function useRecipeExecutions({
         payload,
         rows: normalizedRows,
         settings: runSettings,
-        runName: normalizedRunName,
+        runName,
       });
     },
     [readExecutablePayload, runExecution, runSettings, setRunErrors],

studio/frontend/src/features/studio/sections/dataset-section.tsx

@@ -604,21 +604,13 @@ export function DatasetSection() {
                     Local dataset metadata
                   </p>
                   <p className="text-[10px] text-muted-foreground/80">
-                    Data Recipe output. Eval split unavailable for local datasets.
+                    Data Recipe output.
                   </p>
                 </div>
               </div>
 
               {uploadedFile ? (
                 <div className="flex flex-col gap-3">
-                  <div className="rounded-md bg-background/60 px-2.5 py-2">
-                    <p className="mb-1 text-[10px] uppercase tracking-[0.12em] text-muted-foreground">
-                      Path
-                    </p>
-                    <p className="truncate font-mono text-[11px] text-foreground" title={uploadedFile}>
-                      {uploadedFile}
-                    </p>
-                  </div>
                   <div className="grid grid-cols-2 gap-x-4 gap-y-2 text-xs">
                     <MetadataRow
                       label="Rows"