Track data size history daily (up to 30 days) in memory, with a
dedicated /api/data-history/:name endpoint. The Data Size chart uses
day labels (e.g. "Feb 12") instead of minute-based timestamps.
Charts are now displayed in a 2-column grid.
https://claude.ai/code/session_013agP8J1cCfrWZkueZ33jQB
Rename the "stats" CLI command, tool app, and all internal references
to "metrics". Add file size tracking from each app's DATA_DIR as a new
metric, shown in both the CLI table and web UI.
https://claude.ai/code/session_013agP8J1cCfrWZkueZ33jQB