fix(vless): split oversized Vision frames

[MFSGA]

🤔 This is a ...

• New feature
• Bug fix
• Performance optimization
• Enhancement feature
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Changelog is provided or not needed

[github-actions]

Proxy Throughput Results

Trojan

Transport	Payload	Runs	Upload Mbps	Download Mbps
tcp	32 MB	3	12121.5 +/- 1751.0	12004.0 +/- 492.6
ws	32 MB	3	10791.7 +/- 606.1	9277.2 +/- 3537.1
tcp-netem	32 MB	3	6599.0 +/- 1581.2	9971.7 +/- 1040.3

VLESS

Transport	Payload	Runs	Upload Mbps	Download Mbps
tcp	32 MB	3	11709.6 +/- 1892.8	11664.4 +/- 2055.3
ws	32 MB	3	14115.9 +/- 611.3	16935.4 +/- 1432.0

Hysteria2

Transport	Payload	Runs	Upload Mbps	Download Mbps
plain	32 MB	3	8852.1 +/- 1515.9	9684.0 +/- 459.4
salamander	32 MB	3	11882.8 +/- 475.9	11392.5 +/- 2736.4
plain-netem	32 MB	3	9191.2 +/- 1397.2	11571.5 +/- 565.4

SOCKS5

Transport	Payload	Runs	Upload Mbps	Download Mbps
auth	32 MB	3	7165.7 +/- 789.4	7457.7 +/- 213.9
noauth	32 MB	3	7498.3 +/- 3335.8	7993.6 +/- 4010.7

ANYTLS

Transport	Payload	Runs	Upload Mbps	Download Mbps
tls	32 MB	3	9322.1 +/- 2775.3	10089.1 +/- 916.2

SS

Transport	Payload	Runs	Upload Mbps	Download Mbps
plain	32 MB	3	7210.5 +/- 2631.2	10872.2 +/- 2386.2
obfs-http	32 MB	3	13152.9 +/- 2354.5	12193.5 +/- 1745.5
obfs-tls	32 MB	3	8130.6 +/- 2345.2	7801.2 +/- 1427.2
plain-netem	32 MB	3	7572.6 +/- 1008.1	6733.4 +/- 2276.9
shadow-tls-v3	32 MB	3	11540.2 +/- 886.6	12939.9 +/- 1072.1
v2ray-plugin-ws-tls	32 MB	3	7739.0 +/- 3706.6	7614.2 +/- 1854.9

Test Environment

OS	Linux 6.17.0-1020-azure
Architecture	x86_64
Kernel	6.17.0-1020-azure
CPU	AMD EPYC 9V74 80-Core Processor
CPU Cores	4
Memory GB	15.61
Docker	28.0.4
Rust	rustc 1.97.1 (8bab26f4f 2026-07-14)

View workflow run

Full test log

Download the throughput-results artifact from the workflow run for the full log.