perf(dev/lazy): fetch a lazy route in one request (reland #10789)

[h-a-n-a]

Relands #10789, which #10982 reverted.

#10982 was a temporary revert for vitejs/vite#23547. The Vite fix, vitejs/vite#23568, has now landed: Vite serves the dev runtime from the installed rolldown, instead of a copy built into Vite.

Release note: pair with the next Vite release

This change needs a Vite version that includes vitejs/vite#23568. With older Vite, experimental.bundledDev breaks on every dynamic import:

TypeError: __rolldown_runtime__.requestLazy is not a function

Why older Vite breaks:

• Older Vite (8.3.1 and earlier) has its own copy of the rolldown dev runtime. That copy has no requestLazy.
• Older Vite depends on rolldown with a ~ range (~1.2.9 in 8.3.1, ~1.2.6 in 8.3.0). A ~ range accepts new patch versions.
• So if this ships in a 1.2.x patch, a fresh install of the current Vite gets this rolldown and breaks.

To avoid that, this should ship in a minor release (1.3.0), which ~1.2.x ranges do not pick up. Then the next Vite can move to ~1.3.0 together with vitejs/vite#23568.

🤖 Generated with Claude Code

[h-a-n-a]

• fix(dev/lazy): resolve import() of a CommonJS module to its ESM view #11020
• perf(dev/lazy): fetch a lazy route in one request (reland #10789) #11000 👈 (View in Graphite)
• main

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