fix(landing): align skill-watch card heights, widen description clamp

[Markeljan]

Summary

The skill-watch card grid had two visible issues:

• Inconsistent card heights. The description block was rendered conditionally ({description && …}), so skills with no description rendered no block at all, while skills with 1- or 2-line descriptions rendered different heights. The grid laid them out at uneven heights, producing the misaligned-row look in the screenshot.
• Awkward mid-sentence truncation. line-clamp-2 on the dataset's long descriptions frequently chopped mid-quote ("i…) or right after a short connector word (via…), making the cutoff feel unintentional.

Changes

apps/landing/app/skill-watch/SkillWatchTable.tsx

• Always render the description container with min-h-[88px] (~3 lines reserved), so every card occupies the same vertical slot in the grid regardless of description length.
• Bump from line-clamp-2 → line-clamp-3 for more breathing room and fewer mid-thought cuts.
• Add title={description} so the full description is reachable via native tooltip.
• Show a muted italic No description provided. placeholder when description is empty, instead of collapsing the block.

Verification

• Loaded /skill-watch against the live dataset in next dev.
• DOM inspection across a 12-card sample: every card rendered at uniform 450px height; cards with long descriptions capped at exactly 3 × 20.15px (60.45px) — line-clamp clipping as expected.
• bun run lint clean for the changed file; typecheck passes.

Note: Chrome's getComputedStyle reports display: flow-root after overflow: hidden, but -webkit-line-clamp is still honored — confirmed by measuring rendered heights.

Test plan

• Open /skill-watch, scroll to "Every skill, every score." inventory grid
• Verify all cards in a row align to the same height
• Hover a truncated description — full text appears in browser tooltip
• Confirm skills with empty descriptions show the italic placeholder rather than a collapsed block

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