fix(site): improve auth popup size and clean up Mux links

[decepulis]

Closes #586

Summary

Improve the OAuth sign-up flow popup sizing and clean up Mux-related links on the installation page.

Changes

• Widen OAuth popup from 600×800 to 1366×768 so the auth provider UI isn't cramped (browsers auto-clamp to fit the screen per MDN)
• Remove external Mux marketing link from the renderer picker — keep the text, drop the <a> tag
• Update Mux dashboard link to /my/video/assets instead of root dashboard
• Simplify rel attribute from noopener noreferrer to noopener (same-origin links don't need noreferrer)

Testing

pnpm -F site test src/utils/mux/__tests__/auth-flow.test.ts — tests pass with updated popup dimensions.

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[github-actions]

📦 Bundle Size Report

Package	Size	Diff		%
@videojs/core	5.67 kB	0 B	░░░░░░░░	0%	✅
@videojs/element	1.60 kB	0 B	░░░░░░░░	0%	✅
@videojs/html	8.63 kB	0 B	░░░░░░░░	0%	✅
@videojs/icons	3.46 kB	0 B	░░░░░░░░	0%	✅
@videojs/react	13.05 kB	0 B	░░░░░░░░	0%	✅
@videojs/store	1.94 kB	0 B	░░░░░░░░	0%	✅
@videojs/utils	2.47 kB	0 B	░░░░░░░░	0%	✅

Total: 36.83 kB · 0 B · 0%

---

Entry Breakdown

Subpath sizes are the additional bytes on top of the root entry point, measured by bundling root + subpath together and subtracting the root-only size.

@videojs/core

Entry	Base	PR	Diff	%
.	3.09 kB	3.09 kB	0 B	0%	✅
./dom	2.58 kB	2.58 kB	0 B	0%	✅
total	5.67 kB	5.67 kB	0 B	0%

@videojs/element

Entry	Base	PR	Diff	%
.	817 B	817 B	0 B	0%	✅
./context	823 B	823 B	0 B	0%	✅
total	1.60 kB	1.60 kB	0 B	0%

@videojs/icons

Entry	Base	PR	Diff	%
./react	2.10 kB	2.10 kB	0 B	0%	✅
./html	1.37 kB	1.37 kB	0 B	0%	✅
total	3.46 kB	3.46 kB	0 B	0%

@videojs/react

Entry	Base	PR	Diff	%
.	7.69 kB	7.69 kB	0 B	0%	✅
./audio	266 B	266 B	0 B	0%	✅
./background	268 B	268 B	0 B	0%	✅
./video	4.84 kB	4.84 kB	0 B	0%	✅
total	13.05 kB	13.05 kB	0 B	0%

@videojs/store

Entry	Base	PR	Diff	%
.	1.29 kB	1.29 kB	0 B	0%	✅
./html	468 B	468 B	0 B	0%	✅
./react	199 B	199 B	0 B	0%	✅
total	1.94 kB	1.94 kB	0 B	0%

@videojs/utils

Entry	Base	PR	Diff	%
./array	104 B	104 B	0 B	0%	✅
./dom	684 B	684 B	0 B	0%	✅
./events	227 B	227 B	0 B	0%	✅
./function	197 B	197 B	0 B	0%	✅
./object	119 B	119 B	0 B	0%	✅
./predicate	265 B	265 B	0 B	0%	✅
./string	110 B	110 B	0 B	0%	✅
./style	185 B	185 B	0 B	0%	✅
./time	478 B	478 B	0 B	0%	✅
./number	158 B	158 B	0 B	0%	✅
total	2.47 kB	2.47 kB	0 B	0%

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ℹ️ How to interpret

Sizes are minified + brotli, measured with esbuild.
Package totals are computed as root size + marginal subpath costs.
Subpath marginal cost = (root + subpath bundled together) − root alone.

Icon	Meaning
✅	No change
🔺	Increased ≤ 10%
🔴	Increased > 10%
🔽	Decreased
🆕	New (no baseline)

Run pnpm size locally to check current sizes.