fix(marketing): use app wordmark in header

[voltcrash]

What Changed

Use the desktop/web app's exact T3 SVG wordmark in the shared marketing header, with the app's muted “Code” text treatment.

Why

The marketing header currently shows a plain text name while the product uses a distinct wordmark. Matching them makes the brand consistent across the site and app.

UI Changes

Before:

After:

Verified in T3 Code's Browser panel at desktop and narrow mobile widths. Marketing typecheck and production build pass.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for the UI change

GPT-6 via Codex.

[macroscopeapp]

Approvability

Verdict: Approved at b86ee2c

Macroscope's review found this PR approvable — The shared marketing layout receives a narrowly scoped branding update: an inline wordmark SVG and minor typography/alignment changes. Existing links, accessibility labeling, navigation behavior, and application data flows remain unchanged.

Notes:

• Diff unchanged. Approvability was decided on eligibility alone.

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[coderabbitai]

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository: pingdotgg/t3code/.coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 30f7195f-0668-4c59-bab7-3f6e922fae03

📥 Commits

Reviewing files that changed from the base of the PR and between f5ef0dd and b86ee2c.

📒 Files selected for processing (1)

• apps/marketing/src/layouts/Layout.astro

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📝 Walkthrough

Walkthrough

The marketing site's shared layout adds an inline SVG logo mark to the navigation brand link, changes the wordmark from “T3 Code” to “Code,” and updates the brand's alignment, spacing, size, font weight, and color.

Changes

Marketing brand

Layer / File(s)	Summary
Brand link and styling apps/marketing/src/layouts/Layout.astro	The brand link adds an inline SVG mark and changes its text to “Code.” The CSS aligns the mark and wordmark on the baseline, adds a 4px gap, sizes the mark to 1cap, and updates the wordmark's font weight and color.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~4 minutes

Change: Bug fix

Suggested reviewers: t3dotgg

Merge Risk: ⚪ Minimal · up to b86ee

No material merge risk is evident in this branding update; it appears ready to merge after normal checks.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly identifies the change: using the app wordmark in the marketing header.
Description check	✅ Passed	The description covers what changed and why, includes before-and-after screenshots, reports verification and build checks, and completes the applicable checklist items.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

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Dismissing prior approval to re-evaluate b86ee2c