fix: date timezone display and device data truncation

fix: accumulate device cost/token data instead of overwriting in trend charts

chore: upgrade zod from v3 to v4

chore: upgrade Next.js from v15 to v16 (Turbopack default)

feat(web): add distribution pie charts for agent, device, and cache metrics

chore(collector): bump version to v0.5.3

fix(collector): handle Codex output format differences in field mapping

feat(web): add Codex agent display support and bump version to v0.5.5

feat(collector): add Codex agent support and bump version to v0.5.2

feat(web): add Tokens per Dollar metric for PAYG agents (OpenCode & AMP)

refactor(web): hardcode agent tab order and remove dynamic agent query

feat(web): add OpenCode agent display support and bump version to v0.5.4

feat(collector): add OpenCode agent support and bump version to v0.5.1

fix(web): fix agent filtering for All Time mode and remove data truncation

chore(web): rename dashboard title and bump version to v0.5.2