style(brand): dim AgentV wordmark middle letters

[christso]

Summary

• split AgentV wordmarks so A and V keep the cyan accent while GENT renders light gray
• apply the treatment across docs/web, dashboard, live CLI reports, and static results reports
• add focused static report assertions for the split wordmark markup

Verification

• bun --filter @agentv/web build
• bun --filter @agentv/core build
• bun test apps/cli/test/commands/results/report.test.ts
• bun --filter agentv typecheck
• bun --filter @agentv/dashboard build
• bun x biome check apps/cli/src/commands/eval/html-writer.ts apps/cli/src/commands/results/report-template.ts apps/cli/test/commands/results/report.test.ts apps/dashboard/src/components/BrandName.tsx apps/dashboard/src/styles/globals.css apps/web/src/components/BrandWordmark.astro
• bun --filter @agentv/dashboard test
• browser sanity checks for docs, dashboard, and static report header DOM

[cloudflare-workers-and-pages]

Deploying agentv with    Cloudflare Pages

Latest commit:	5ae14ba
Status:	✅  Deploy successful!
Preview URL:	https://c18bd61b.agentv.pages.dev
Branch Preview URL:	https://ui-agentv-wordmark-contrast.agentv.pages.dev

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