fix: panic in seichannel

internal/muxconn/conn.go

@@ -25,6 +25,7 @@ import (
 
 	"github.com/openlibrecommunity/olcrtc/internal/crypto"
 	"github.com/openlibrecommunity/olcrtc/internal/link"
+	"github.com/openlibrecommunity/olcrtc/internal/logger"
 )
 
 // ErrClosed is returned from Read/Write after the conn has been closed.
@@ -53,6 +54,7 @@ func New(ln link.Link, cipher *crypto.Cipher) *Conn {
 func (c *Conn) Push(ciphertext []byte) {
 	pt, err := c.cipher.Decrypt(ciphertext)
 	if err != nil {
+		logger.Debugf("muxconn: decrypt failed, dropping frame: %v", err)
 		return
 	}
 	c.mu.Lock()

internal/transport/seichannel/h264.go

@@ -190,7 +190,8 @@ func unescapeRBSP(rbsp []byte) []byte {
 func mustDecodeHex(value string) []byte {
 	data, err := hex.DecodeString(value)
 	if err != nil {
-		panic(err)
+		// Hardcoded constants — if this fires the binary is corrupt.
+		panic(fmt.Sprintf("mustDecodeHex: invalid hardcoded constant %q: %v", value, err))
 	}
 	return data
 }