Upgrade to Vite 8 (#7184)

* Upgrade to Vite 8

* Add release notes

* PR feedback

* [autofix.ci] apply automated fixes

* PR feedback

* fix: inject process.env

* Restore deleted release note

* Clean up and typecheck

* Fix dev server

* Fix type error

* Fix tests

* PR feedback

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

packages/ci-actions/package.json

@@ -10,7 +10,7 @@
   "devDependencies": {
     "@typescript/native-preview": "^7.0.0-dev.20260309.1",
     "extensionless": "^2.0.6",
-    "vitest": "^4.0.18"
+    "vitest": "^4.1.0"
   },
   "extensionless": {
     "lookFor": [