Problem

The /discover endpoint uses raw TCP to fetch Chrome's /json/list, but:

1. Chrome DevTools HTTP server ignores HTTP/1.0 requests (returns 0 bytes)
2. With HTTP/1.1 + Connection: close, the stream.read() loop blocks waiting for more data because Chrome doesn't close the connection promptly
3. net.Address.resolveIp() fails for hostname localhost — need parseIp4("127.0.0.1", port)

Fix Options

• Use HTTP/1.1 with Content-Length-aware read loop (parse headers, read exact body length)
• Add socket read timeout via setsockopt(SO_RCVTIMEO) on the raw fd
• Consider using std.http.Client from Zig 0.15.1 instead of raw TCP

Files

• src/server/router.zig (handleDiscover)
• src/cdp/websocket.zig (same resolveIp issue in parseWsUrl — should use parseIp4 for localhost)