feat(collections): remove software value, header gradient, compact achievements

[gaspergrom]

Summary

• Removes the "Software Value" column from all collection detail pages (Community + LF Foundation) — retired due to AI-generated contribution distortion, no replacement.
• Removes the gradient background from collection detail page headers — all types (curated/community/my-collections) now use a plain white header.
• Redesigns the Achievements badge cluster to a more compact layout (smaller chip size, tighter spacing/icon), same underlying achievement data.

Ticket

IN-1194 — part of epic IN-1191 (Collections v2 UI). PR targets the epic release branch release/IN-1191-collections-v2, not main.

Acceptance criteria

• Software Value column absent from all collection detail pages (table header, row cells, mobile card)
• No gradient background on any collection page header
• Achievements column renders in the new compact layout

Notes

• Column widths in the projects table were rebalanced (Contributors absorbed the width freed by the removed Software Value column) — verified all columns still sum to 12/12 across the header and both row states (onboarded / not-onboarded).
• collection-card.vue (the list-page card gradient) was intentionally left untouched — this ticket scopes only the collection detail page header, not list cards.
• Out of scope (per ticket + confirmed plan): Lifecycle/Health-band/Impact score columns belong to the separate Akrites methodology epic.

Test plan

• pnpm tsc-check — clean
• pnpm lint — 0 errors (9 pre-existing warnings, unrelated files)
• Manual QA: open a curated collection and a community collection detail page, confirm no gradient, no Software Value column, compact achievement badges

https://claude.ai/code/session_01EVEwYbhbFwrXPRHt1HiKeE

• release/IN-1191-collections-v2 - ⚠️ No PR associated with branch
  • feat(collections): remove software value, header gradient, compact achievements 👈

[Copilot]

Pull request overview

Updates Collections v2 detail pages by removing Software Value, simplifying headers, and compacting achievement badges.

Changes:

• Removes Software Value from desktop and mobile project views.
• Rebalances table columns.
• Uses plain headers and smaller achievement chips.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
collection-details.vue	Removes the Software Value header and rebalances widths.
collection-type-config.ts	Replaces gradient generation with a white background.
header.vue	Uses the simplified header background helper.
collection-project-item.vue	Removes Software Value cells and mobile metadata.
badge-details.vue	Compacts achievement badge styling.

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