chore(app): upgrade to Vite v8

[JeanMeijer]

Summary

• Upgrades the app/tooling stack to Vite 8.
• Updates related Vite plugin/package versions across app, UI demo, Den web, and landing packages.
• Adjusts PostCSS/Tailwind imports/config for the upgraded toolchain.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
openwork-app	Ready	Preview, Comment	May 26, 2026 1:45pm
openwork-den	Ready	Preview, Comment	May 26, 2026 1:45pm
openwork-den-worker-proxy	Ready	Preview, Comment	May 26, 2026 1:45pm
openwork-landing	Ready	Preview, Comment, Open in v0	May 26, 2026 1:45pm
openwork-share	Error		May 26, 2026 1:45pm

[cubic-dev-ai]

1 issue found across 10 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="ee/apps/den-web/package.json">

<violation number="1" location="ee/apps/den-web/package.json:25">
P2: `autoprefixer` is redundant with Tailwind CSS v4. The `@tailwindcss/postcss` plugin handles vendor prefixing internally via Lightning CSS, so keeping autoprefixer can produce duplicated prefixes in the output CSS. Remove `autoprefixer` from both `package.json` and `postcss.config.js`.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Fix all with cubic | Re-trigger cubic</sub>

[cubic-dev-ai]

P2: autoprefixer is redundant with Tailwind CSS v4. The @tailwindcss/postcss plugin handles vendor prefixing internally via Lightning CSS, so keeping autoprefixer can produce duplicated prefixes in the output CSS. Remove autoprefixer from both package.json and postcss.config.js.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At ee/apps/den-web/package.json, line 25:

<comment>`autoprefixer` is redundant with Tailwind CSS v4. The `@tailwindcss/postcss` plugin handles vendor prefixing internally via Lightning CSS, so keeping autoprefixer can produce duplicated prefixes in the output CSS. Remove `autoprefixer` from both `package.json` and `postcss.config.js`.</comment>

<file context>
@@ -22,12 +22,13 @@
     "react-dom": "catalog:"
   },
   "devDependencies": {
+    "@tailwindcss/postcss": "4.3.0",
     "@types/node": "20.12.12",
     "@types/react": "19.2.14",
</file context>

[benjaminshafii]

Approved via automated Daytona Electron smoke test (agent). Tested: Electron boot, app render (Vite v8 dev server), settings navigation, back-to-app. All passed, no regressions from the Vite upgrade.

[benjaminshafii]

This PR has merge conflicts after the other PRs in this batch were merged (#1964, #1960, #1946, #1944). Needs a rebase to resolve. (Agent note: Daytona Electron smoke test passed before the conflicts arose -- the branch itself is good, just needs conflict resolution.)

[cubic-dev-ai]

1 issue found across 10 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="ee/apps/landing/package.json">

<violation number="1" location="ee/apps/landing/package.json:23">
P2: `autoprefixer` is redundant with Tailwind CSS v4 and should be removed. According to the Tailwind v4 upgrade guide, `@tailwindcss/postcss` handles vendor prefixing automatically via Lightning CSS. Keeping both may cause double-prefixing and adds an unnecessary dependency. Remove `autoprefixer` from `package.json` and from `postcss.config.js`.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Fix all with cubic | Re-trigger cubic</sub>

[cubic-dev-ai]

P2: autoprefixer is redundant with Tailwind CSS v4 and should be removed. According to the Tailwind v4 upgrade guide, @tailwindcss/postcss handles vendor prefixing automatically via Lightning CSS. Keeping both may cause double-prefixing and adds an unnecessary dependency. Remove autoprefixer from package.json and from postcss.config.js.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At ee/apps/landing/package.json, line 23:

<comment>`autoprefixer` is redundant with Tailwind CSS v4 and should be removed. According to the Tailwind v4 upgrade guide, `@tailwindcss/postcss` handles vendor prefixing automatically via Lightning CSS. Keeping both may cause double-prefixing and adds an unnecessary dependency. Remove `autoprefixer` from `package.json` and from `postcss.config.js`.</comment>

<file context>
@@ -20,12 +20,13 @@
     "react-dom": "catalog:react18"
   },
   "devDependencies": {
+    "@tailwindcss/postcss": "4.3.0",
     "@types/node": "20.12.12",
     "@types/react": "18.2.79",
</file context>