feat(planning): per-column WIP limits

[tomymaritano]

Summary

Adds per-column WIP limits to the Planning board (follow-up #1). Stacked on #444 — base is feature/planning-kanban-data; will retarget to develop once #444 merges.

• Click a column's count badge to set a WIP limit (persisted per stage in localStorage via a small zustand store).
• When a limit is set the badge shows count / limit; it turns red when the column exceeds its limit.
• Empty / 0 clears the limit (∞).

Files

• stores/planningStore.ts — persisted per-stage WIP limits (zustand + persist)
• components/planning/wip.ts — pure isOverWipLimit / parseWipLimit helpers
• components/planning/PlanningColumn.tsx — inline limit editor + over-limit styling
• components/planning/__tests__/wip.test.ts — unit tests for the helpers

Testing

• pnpm typecheck / pnpm lint — green
• pnpm --filter @dripnex/desktop test — 66 passing (+5 new WIP tests)
• pnpm --filter @dripnex/desktop build — bundles OK

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

🗂️ Base branches to auto review (2)

• main
• develop

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: b7849934-efd1-4b9b-8f16-f9c773e08859

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/planning-kanban-wip

---

_{Comment @coderabbitai help to get the list of available commands.}