fix: show full AI model card text

[superhighfives]

Defect

AI model cards on /ai/models visually clipped titles and descriptions and showed ellipses after the second line.

Fix

• Remove forced line-clamp-2 from model-card titles and descriptions.
• Add min-w-0 so long titles wrap beside the logo and Beta badge.
• Preserve author truncation and shared card/grid primitives.
• Add focused Astro regression coverage for the unclamped title and description contract.

Validation

• Hosted Pre Build: passed Astro check, Worker TypeScript check, ESLint, Prettier, and 125 Node/Astro tests.
• Local rendered model-page smoke checks: no card line-clamp-2; author truncation retained.
• The local worker-suite run was blocked by Miniflare’s 25 MiB per-asset limit on a generated 52 MiB build asset. This local build-artifact limitation is unrelated to this change.

[cloudflare-docs-bot]

Review

✅ No issues found in commit d8ec352.

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[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/components/models/	@ethulia, @kflansburg, @mchenco, @shridhar-cf, @superhighfives, @cloudflare/product-owners, @cloudflare/content-engineering

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