feat: Implement danmaku (bullet comments) functionality with API integration, settings, and player display.

app/api/danmaku/route.ts

@@ -0,0 +1,85 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+export const runtime = 'edge';
+
+const CORS_HEADERS = {
+  'Access-Control-Allow-Origin': '*',
+  'Access-Control-Allow-Methods': 'GET, OPTIONS',
+  'Access-Control-Allow-Headers': 'Content-Type',
+};
+
+export async function OPTIONS() {
+  return new NextResponse(null, { headers: CORS_HEADERS });
+}
+
+export async function GET(request: NextRequest) {
+  const { searchParams } = request.nextUrl;
+  const action = searchParams.get('action');
+  const apiUrl = searchParams.get('apiUrl');
+
+  if (!action || !apiUrl) {
+    return NextResponse.json(
+      { error: 'Missing action or apiUrl parameter' },
+      { status: 400, headers: CORS_HEADERS }
+    );
+  }
+
+  // Normalize base URL (remove trailing slash)
+  const baseUrl = apiUrl.replace(/\/+$/, '');
+
+  try {
+    let targetUrl: string;
+
+    if (action === 'search') {
+      const keyword = searchParams.get('keyword');
+      if (!keyword) {
+        return NextResponse.json(
+          { error: 'Missing keyword parameter' },
+          { status: 400, headers: CORS_HEADERS }
+        );
+      }
+      targetUrl = `${baseUrl}/api/v2/search/episodes?anime=${encodeURIComponent(keyword)}`;
+    } else if (action === 'comments') {
+      const episodeId = searchParams.get('episodeId');
+      if (!episodeId) {
+        return NextResponse.json(
+          { error: 'Missing episodeId parameter' },
+          { status: 400, headers: CORS_HEADERS }
+        );
+      }
+      targetUrl = `${baseUrl}/api/v2/comment/${encodeURIComponent(episodeId)}?withRelated=true`;
+    } else {
+      return NextResponse.json(
+        { error: 'Invalid action. Use "search" or "comments".' },
+        { status: 400, headers: CORS_HEADERS }
+      );
+    }
+
+    const response = await fetch(targetUrl, {
+      headers: {
+        'Accept': 'application/json',
+        'User-Agent': 'KVideo/1.0',
+      },
+    });
+
+    if (!response.ok) {
+      return NextResponse.json(
+        { error: `Upstream API returned ${response.status}` },
+        { status: response.status, headers: CORS_HEADERS }
+      );
+    }
+
+    const data = await response.json();
+    return NextResponse.json(data, {
+      headers: {
+        ...CORS_HEADERS,
+        'Cache-Control': 'public, max-age=3600', // Cache danmaku for 1 hour
+      },
+    });
+  } catch (error) {
+    return NextResponse.json(
+      { error: 'Failed to fetch from danmaku API' },
+      { status: 502, headers: CORS_HEADERS }
+    );
+  }
+}