Add backend log management

app/api/logs/route.ts

@@ -0,0 +1,40 @@
+import { jsonError, jsonOk } from "@/lib/server/api";
+import { appLogFilePath, appLogMaxBytes, clearAppLogs, listAppLogs, type AppLogLevel } from "@/lib/server/log-manager";
+
+export const runtime = "nodejs";
+export const dynamic = "force-dynamic";
+
+export async function GET(request: Request) {
+  try {
+    const url = new URL(request.url);
+    const level = parseLevel(url.searchParams.get("level"));
+    const q = url.searchParams.get("q") || undefined;
+    const limit = Number(url.searchParams.get("limit") || 100);
+    const entries = await listAppLogs({
+      level,
+      q,
+      limit: Number.isFinite(limit) ? limit : 100
+    });
+    return jsonOk({
+      entries,
+      logPath: appLogFilePath(),
+      maxBytes: appLogMaxBytes()
+    });
+  } catch (error) {
+    return jsonError(error, 500, { request, source: "api.logs" });
+  }
+}
+
+export async function DELETE(request: Request) {
+  try {
+    await clearAppLogs();
+    return jsonOk({ ok: true });
+  } catch (error) {
+    return jsonError(error, 500, { request, source: "api.logs" });
+  }
+}
+
+function parseLevel(value: string | null): AppLogLevel | "all" {
+  if (value === "info" || value === "warning" || value === "error") return value;
+  return "all";
+}