Let reviews be stopped, and fail stuck reviewers automatically

web/src/api.gen.ts

@@ -664,6 +664,25 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    "/api/reviews/{reviewId}/stop": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                reviewId: string;
+            };
+            cookie?: never;
+        };
+        get?: never;
+        put?: never;
+        /** @description Ends a running review's reviewer and records the review as failed. Refused unless the review is running. */
+        post: operations["stopReview"];
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
     "/api/tasks/{taskId}/snapshots/{n}/fork": {
         parameters: {
             query?: never;
@@ -2549,6 +2568,30 @@ export interface operations {
             404: components["responses"]["Error"];
         };
     };
+    stopReview: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path: {
+                reviewId: string;
+            };
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description The review. */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["Review"];
+                };
+            };
+            404: components["responses"]["Error"];
+            409: components["responses"]["Error"];
+        };
+    };
     forkSnapshot: {
         parameters: {
             query?: never;

web/src/reviews.ts

@@ -62,12 +62,27 @@ export function reviewCard(r: Review, taskId: string | undefined): HTMLElement {
       h("span", { class: "review-snapshot" }, `snapshot #${r.snapshot_n}`),
       h("span", { class: `review-state ${r.state}` }, stateText(r)),
       h("time", { dateTime: r.created_at, title: r.created_at }, ago(r.created_at)),
+      r.state === "running" ? stopButton(r) : null,
     ),
     r.state === "failed" ? h("p", { class: "error-text" }, r.error) : null,
     r.state === "done" ? reviewResult(r, taskId) : null,
   );
 }
 
+function stopButton(r: Review): HTMLElement {
+  const b = h("button", { type: "button", class: "danger review-stop", title: "End the reviewer and record this review as failed" }, "Stop");
+  b.onclick = async () => {
+    b.disabled = true;
+    try {
+      await post("/api/reviews/{reviewId}/stop", { path: { reviewId: r.id } });
+    } catch (err) {
+      b.disabled = false;
+      void showAlert(errorText(err));
+    }
+  };
+  return b;
+}
+
 function reviewResult(r: Review, taskId: string | undefined): HTMLElement {
   const res = (r.result ?? {}) as Record<string, unknown>;
   const findings = findingsOf(r);