The trend chart tooltip always displayed `bar.tokens` in its header,
which is zero for provider-filtered history (the CLI only carries
per-provider cost+calls in the daily cache, not tokens). Result: when
you selected Claude/Codex/Cursor/Pi, hovering a bar showed $0.00 even
on days with real spend.
The trend chart's main metric already falls back to cost when tokens
are zero. Pass that same metric value through to the tooltip so both
stay consistent.
Also removed the misleading "No model breakdown available" fallback
line. For provider-filtered views the per-model breakdown legitimately
doesn't exist in the payload, so the tooltip now just shows date +
cost without the error-sounding message.
The Plan pane previously told users to "run claude login in your
terminal, then retry" with no way to start the flow from the app.
Added a primary Connect Claude button on both the no-credentials and
failed states that launches Terminal.app with `claude login`, so the
OAuth flow is one click away.
TerminalLauncher.openClaudeLogin() uses a hardcoded literal, so no
user input reaches AppleScript. Refactored the common path into
runInTerminal(command:preValidated:) which re-validates any non-
literal input against CodeburnCLI.isSafe as defense-in-depth.
On machines without Terminal.app (iTerm/Ghostty/Warp), the button
surfaces an inline instruction to run `claude login` manually instead
of failing silently.
