feat(sproutclaw): modularize webui, extensions, and agent config layout

Restructure local extensions into per-feature directories, split WebUI
into backend modules with slash commands and systemd support, and track
prompts/skills under .pi/agent for portable Gitea deployment.

Co-authored-by: Cursor <cursoragent@cursor.com>

.pi/agent/extensions/webui/backend/routes/sessions.ts

@@ -0,0 +1,124 @@
+import type { IncomingMessage, ServerResponse } from "node:http";
+import {
+	appendSessionName,
+	buildSessionListResponse,
+	deleteSessionFile,
+	pinSession,
+	readSessionMessages,
+	readSessionSummary,
+	resolveSessionFile,
+} from "../services/sessions.ts";
+import type { WebUiContext } from "../types/context.ts";
+import { json, readBody } from "../http/request.ts";
+
+export function handleSessionsRoute(
+	req: IncomingMessage,
+	res: ServerResponse,
+	ctx: WebUiContext,
+	pathname: string,
+): boolean {
+	const { paths } = ctx.config;
+	const { sendCmd } = ctx.rpc;
+
+	if (req.method === "POST" && pathname === "/api/new-session") {
+		void sendCmd({ type: "new_session" })
+			.then(async (r: any) => {
+				if (!r.success) return json(res, { error: r.error }, 500);
+				if (r.data?.cancelled) return json(res, r.data);
+				const state = await sendCmd({ type: "get_state" });
+				const sessionFile = state.success ? state.data?.sessionFile : undefined;
+				return json(res, { ...r.data, sessionFile });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "GET" && pathname === "/api/sessions") {
+		json(res, buildSessionListResponse(paths));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/history") {
+		void readBody(req)
+			.then(({ path: sp }) => {
+				const messages = readSessionMessages(sp as string);
+				const summary = readSessionSummary(paths, sp as string);
+				json(res, { messages, session: summary });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/delete") {
+		void readBody(req)
+			.then(({ path: sp }) => {
+				deleteSessionFile(paths, sp as string);
+				json(res, { ok: true });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/pin") {
+		void readBody(req)
+			.then(({ path: sp, pinned }) => {
+				const result = pinSession(paths, sp as string, Boolean(pinned));
+				json(res, { ok: true, ...result });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/load") {
+		void readBody(req)
+			.then(async ({ path: sp }) => {
+				const sw = await sendCmd({ type: "switch_session", sessionPath: sp, cwdOverride: paths.repoRoot });
+				if (!sw.success) throw new Error(sw.error);
+				const mr = await sendCmd({ type: "get_messages" });
+				if (!mr.success) throw new Error(mr.error);
+				const summary = readSessionSummary(paths, sp as string);
+				json(res, { messages: mr.data.messages, session: summary });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/activate") {
+		void readBody(req)
+			.then(async ({ path: sp }) => {
+				const sw = await sendCmd({ type: "switch_session", sessionPath: sp, cwdOverride: paths.repoRoot });
+				if (!sw.success) throw new Error(sw.error);
+				const state = await sendCmd({ type: "get_state" });
+				if (!state.success) throw new Error(state.error);
+				json(res, { ok: true, state: state.data });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "POST" && pathname === "/api/sessions/name") {
+		void readBody(req)
+			.then(async ({ path: sp, name }) => {
+				if (typeof sp !== "string" || !sp.trim()) throw new Error("无效会话路径");
+				const savedName = appendSessionName(paths, sp, typeof name === "string" ? name : "");
+				const sessionPath = resolveSessionFile(paths, sp);
+				const state = await sendCmd({ type: "get_state" });
+				if (state.success && state.data?.sessionFile === sessionPath) {
+					const rename = await sendCmd({ type: "set_session_name", name: savedName });
+					if (!rename.success) throw new Error(rename.error || "同步当前会话名称失败");
+				}
+				json(res, { ok: true, name: savedName });
+			})
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	if (req.method === "GET" && pathname === "/api/session-state") {
+		void sendCmd({ type: "get_state" })
+			.then((r: any) => (r.success ? json(res, r.data) : json(res, { error: r.error }, 500)))
+			.catch((err) => json(res, { error: err.message }, 500));
+		return true;
+	}
+
+	return false;
+}