v1.2.0

Added

• Advisor — a new panel in the dashboard with ranked, money-quantified tips to
  cut waste, computed entirely from your local usage data (no network, no API key,
  no prompt text). Toggle with advisor.enabled (on by default). It surfaces:
  • Routing routine turns to a cheaper model — when a period's spend includes a
    run of short turns on an expensive model, it estimates what those same turns
    would have cost one tier down (e.g. Opus → Sonnet) and shows the saving.
  • Long sessions re-processing context uncached — sessions with many turns but
    low prompt-cache reuse, where context was paid for at full input price instead
    of read back at ~1/10th.
  • Sessions running near the context limit — a habit of peaking above 80%
    context, where Claude has to compact or drop earlier context to keep going.
  • A month-end spend forecast at your current pace.
  • Subscription-aware framing — on a Pro/Max plan (flat fee, no per-token billing)
    the dollar figures are labeled estimated API-equivalent usage (a gauge, not a
    bill) and the advice — local cards and the AI explanation alike — is framed around
    your 5-hour / weekly session limits instead of a bill. The Today / This Month /
    All Time cost cards also carry a subtle "≈ API-equivalent" caption.
• Explain with AI (opt-in) — a button on the Advisor panel that turns the
  computed signals into written, prioritized coaching. It calls Anthropic's Messages
  API with your own API key (stored in VS Code Secret Storage via the new Set
  Anthropic API Key command; never the Claude Code OAuth token). Only usage metadata
  is sent by default; prompt text is included only if you enable
  advisor.ai.includePrompts and confirm each time. The model is configurable with
  advisor.ai.model (default Sonnet). Needs a pay-as-you-go Anthropic API key (a
  Pro/Max subscription doesn't include API credit); the call surfaces Anthropic's
  actual error — e.g. a 400 "credit balance is too low" with a one-click link to
  billing — instead of a bare status code.