feat: add feature name to microdollar usage rows

[kiloconnect]

Summary

Add the feature name (e.g. vscode-extension, jetbrains-extension, cli, slack, kilo-claw, cloud-agent, code-review, etc.) to the usage rows exposed to users, for both organization-level and user-level usage.

The feature_id already exists in microdollar_usage_metadata, linking to the feature lookup table. This PR joins through that relationship to surface the feature name in the API responses and usage tables.

Changes

Backend

• src/app/api/profile/usage/route.ts — User-level usage API: LEFT JOIN microdollar_usage_metadata + feature tables, add feature to select fields and GROUP BY
• src/routers/organizations/organization-usage-details-router.ts — Org-level usage get endpoint: LEFT JOIN microdollar_usage_metadata + feature tables, add feature to select/groupBy/response schema

Types

• src/lib/organizations/organization-types.ts — Add optional feature field to UsageDetailByDay

Frontend

• src/app/(app)/usage/page.tsx — Add Feature column to user-level usage table
• src/components/organizations/usage-details/hooks/useUsageTableData.tsx — Add Feature column to org usage table (parent + expanded child rows)
• src/components/organizations/usage-details/utils/csvExport.ts — Add Feature column to CSV export

Testing

• pnpm typecheck passes cleanly
• Lint-staged (prettier + typecheck) passes on commit

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Built for Brendan by Kilo for Slack

[kiloconnect]

Code Review Summary

Status: 1 Issue Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	1
SUGGESTION	0

Other Observations (not in diff)

Issues found in unchanged code that cannot receive inline comments:

File	Line	Issue
src/components/organizations/usage-details/hooks/useUsageTableData.tsx	158	WARNING: Duplicate React keys for expanded child rows. The child row id is constructed as `${rollup.date}-${usage.user.email}${groupByModel ? `-${usage.model || 'unknown'}` : ''}` which does not include feature. Since the backend now groups by feature.feature, the same user on the same date (and model) can have multiple rows with different features. These child rows will have identical id values, causing React duplicate key warnings and potential rendering bugs. Consider appending -${usage.feature || 'none'} to the child row ID.

Files Reviewed (6 files)

• src/app/(app)/usage/page.tsx - 0 issues
• src/app/api/profile/usage/route.ts - 0 issues
• src/components/organizations/usage-details/hooks/useUsageTableData.tsx - 1 issue (not in diff)
• src/components/organizations/usage-details/utils/csvExport.ts - 0 issues
• src/lib/organizations/organization-types.ts - 0 issues
• src/routers/organizations/organization-usage-details-router.ts - 0 issues

Fix these issues in Kilo Cloud