Work Items filters, Tech Debt Register scoring, Plans view persistence (v0.3.23)

[SylonZero]

What

• Work Items: filter by Asset and Area (options derived from the loaded items, with "No asset"/"No area" buckets), plus an "Owned by me" toggle matching the Plans/Tasks pattern.
• Tech Debt Register: asset groups now rank by the same severity-weighted debt score used on Products/Analytics (low:3 / medium:8 / high:15 / critical:25, capped at 100; manual techDebtScore override wins over derived). Each group shows a Debt score badge and the asset's health badge — previously it ranked by raw item count, so five low-severity items outranked one critical.
• Code Plans: the card/list view choice persists across sessions via a plans_view cookie (mirrors the product_scope cookie pattern: read server-side in the page, written on toggle client-side).

Verification

• Drove the app locally (sqlite): work-items renders the three filter selects + owned-by-me switch; plans_view=list cookie flips SSR to the table view and absence renders cards.
• 167/167 vitest, tsc clean apart from the pre-existing passwordHash errors.

Notes

• Merge before #feat/asset-ownership — that branch stacks on this one (both touch the debt register).

🤖 Generated with Claude Code