Add SSE response summary helpers (#466)

Co-authored-by: Gregory Schier <gschier1990@gmail.com>

apps/yaak-client/lib/responseBody.ts

@@ -1,7 +1,8 @@
 import { readFile } from "@tauri-apps/plugin-fs";
 import type { HttpResponse } from "@yaakapp-internal/models";
 import type { FilterResponse } from "@yaakapp-internal/plugins";
-import type { ServerSentEvent } from "@yaakapp-internal/sse";
+import type { ServerSentEvent, SseSummary } from "@yaakapp-internal/sse";
+import { candidateJsonPayloadsFromSseText, computeSseSummary } from "@yaakapp-internal/sse";
 import { invokeCmd } from "./tauri";
 
 export async function getResponseBodyText({
@@ -27,9 +28,36 @@ export async function getResponseBodyEventSource(
   response: HttpResponse,
 ): Promise<ServerSentEvent[]> {
   if (!response.bodyPath) return [];
-  return invokeCmd<ServerSentEvent[]>("cmd_get_sse_events", {
-    filePath: response.bodyPath,
-  });
+  try {
+    const events = await invokeCmd<ServerSentEvent[]>("cmd_get_sse_events", {
+      filePath: response.bodyPath,
+    });
+    if (events.length > 0) {
+      return events;
+    }
+  } catch {
+    // Fall back to raw JSON frame parsing for non-standard SSE-like responses.
+  }
+
+  const bytes = await readFile(response.bodyPath);
+  const text = new TextDecoder("utf-8").decode(bytes);
+  return candidateJsonPayloadsFromSseText(text).map((data, index) => ({
+    data,
+    eventType: "",
+    id: String(index),
+    retry: null,
+  }));
+}
+
+export async function getResponseBodySseSummary(
+  response: HttpResponse,
+  resultKeyPath: string,
+): Promise<SseSummary> {
+  if (!response.bodyPath) return { fragmentCount: 0, summary: "" };
+
+  const bytes = await readFile(response.bodyPath);
+  const text = new TextDecoder("utf-8").decode(bytes);
+  return computeSseSummary(text, resultKeyPath);
 }
 
 export async function getResponseBodyBytes(