feat: enable vapor mode benchmark

[ubugeeei]

Summary

• Upgrade Vue to 3.6.0 beta and Vuerend to 0.2.0.
• Enable Vuerend/Vize Vapor mode by default.
• Mark island subtree SFCs with <script setup vapor> and use Vue 3 reactive props destructure instead of toRefs.
• Add a runtime alias shim for the published Vuerend 0.2.0 Vapor runtime chunk.
• Mount Vapor islands over SSR HTML on idle while Vapor SSR hydration is still unstable.
• Keep static preview working with dist/client output and disable module preload for smaller critical loading.

Production Benchmark

Compared against origin/main (b8eddf7) using vp build for both branches.
Browser timings use local vp preview --outDir dist/client, Chromium, 7 cold runs, median values, no service worker.

Metric	main	Vapor branch	Delta
Client JS assets total	100,704 B raw / 38,207 B gzip	98,617 B raw / 36,128 B gzip	-2,087 B raw / -2,079 B gzip
Home loaded JS	93,975 B raw / 35,301 B gzip	89,639 B raw / 32,268 B gzip	-4,336 B raw / -3,033 B gzip
Vue runtime chunk	63,722 B raw / 24,954 B gzip	54,122 B raw / 20,208 B gzip	-9,600 B raw / -4,746 B gzip
FCP median	188.0 ms	180.0 ms	-8.0 ms
DOMContentLoaded median	183.9 ms	173.9 ms	-10.0 ms
Last JS response end median	186.7 ms	186.2 ms	-0.5 ms
loadEventEnd median	303.7 ms	447.5 ms	+143.8 ms

Notes

• The runtime chunk is smaller with Vapor, but the SFC chunks are larger, so total JS improvement is modest.
• SSR HTML is visible before island mount, and local load timing is noisy; loadEventEnd did not improve in this run even though Home loaded JS gzip decreased by ~3.0 kB.
• Browser smoke on the Vapor build reports no console warnings/errors, and search, view switching, and row expansion work.
• Server build still logs Vize warnings that SFC Vapor SSR is not supported yet and falls back to standard SSR output; this is expected for now.

Verification

• vp fmt . --check
• vp lint .
• vp run typecheck
• vp test run
• vp build