feat: show daily key usage in dashboard

README.md

@@ -81,20 +81,25 @@ Environment variables override the config file:
 
 ## Unified Dashboard
 
-`shusub2` opens a single dashboard with Accounts, Logs, and Errors tables
-stacked vertically. Press `a`, `l`, or `e` to focus a table, `/` to filter all
-three tables, and `r` to refresh all data. The two-line detail area follows the
-selected row.
+`shusub2` opens a single dashboard with Accounts, Keys, Logs, and Errors
+tables stacked vertically. Press `a`, `k`, `l`, or `e` to focus a table, `/` to
+filter all four tables, and `r` to refresh all data. The two-line detail area
+follows the selected row.
 
 The dashboard uses compact columns sized to fit an 80-column terminal without
 horizontal scrolling:
 
 ```text
 ACCOUNT | Group | Today | Daily | 5h | 7d | Avail
+KEY | Today | Tokens | Req
 LOG KEY | Account | Model | Cost | Latency | Time
 ERR | Status | Account | Model | Phase | Type | Time
 ```
 
+The Keys table shows today's usage sorted by actual cost, including key name,
+tokens, and request count. It uses the same admin API key as Logs and Errors;
+without that token the table is hidden and the summary remains compact.
+
 Use `--accounts`, `--logs`, or `--errors` to start a dedicated full-table view.
 The corresponding `--once` form still prints only that data set.
 
@@ -205,8 +210,8 @@ Configuration:
 
 The dashboard reads `/api/tui/accounts` and can optionally read `sub2api-status`
 `/api/status` for channel monitor health. The Accounts table does not need SSH,
-database access, API keys, OAuth credentials, or plaintext env files. The
-Logs and Errors tables authenticate to the Sub2API admin APIs with
+database access, API keys, OAuth credentials, or plaintext env files. The Keys,
+Logs, and Errors tables authenticate to the Sub2API admin APIs with
 an admin API key stored only in `~/.config/shusub2/logs-token` (0600) or
 `SHUSUB2_LOGS_TOKEN`.