Ground Bean Bro in displayed temperatures, stream replies, and add activity calendar

public/js/api.js

@@ -33,3 +33,51 @@ export async function api(url, options = {}) {
 	}
 	return body;
 }
+
+// Fetch-based SSE keeps the existing cookie authentication and CSRF protection.
+export async function streamPlanChat(body, onText) {
+	const response = await protectedFetch("/api/plan-chat", {
+		method: "POST",
+		headers: { "content-type": "application/json", accept: "text/event-stream" },
+		body: JSON.stringify(body),
+	});
+	if (!response.ok) {
+		const data = await response.json().catch(() => ({}));
+		const error = new Error(data.error || data.code || "Request failed");
+		error.code = data.code;
+		if (response.status === 401 && data.code === "unauthorized") location.assign("/login");
+		throw error;
+	}
+	// Supports an older server during rolling deployment.
+	if (!response.headers.get("content-type")?.includes("text/event-stream"))
+		return response.json();
+	const reader = response.body.getReader();
+	const decoder = new TextDecoder();
+	let buffer = "";
+	try {
+		while (true) {
+			const { value, done } = await reader.read();
+			buffer += decoder.decode(value, { stream: !done });
+			let end;
+			while ((end = buffer.indexOf("\n\n")) !== -1) {
+				const frame = buffer.slice(0, end);
+				buffer = buffer.slice(end + 2);
+				const event = frame.match(/^event: (.+)$/m)?.[1];
+				const raw = frame.match(/^data: (.+)$/m)?.[1];
+				if (!raw) continue;
+				const data = JSON.parse(raw);
+				if (event === "reply") onText(data.text);
+				if (event === "done") return data;
+				if (event === "error") {
+					const error = new Error(data.error || "Reply interrupted");
+					error.code = data.code;
+					throw error;
+				}
+			}
+			if (done) throw new Error("Connection interrupted before Bean Bro finished. Please retry.");
+		}
+	} finally {
+		await reader.cancel().catch(() => {});
+		reader.releaseLock();
+	}
+}