docs: replace english locale mirrors with translated landing pages

docs/pt-BR/concepts/usage-tracking.md

@@ -1,35 +0,0 @@
----
-summary: "Usage tracking surfaces and credential requirements"
-read_when:
-  - You are wiring provider usage/quota surfaces
-  - You need to explain usage tracking behavior or auth requirements
-title: "Usage Tracking"
----
-
-# Usage tracking
-
-## What it is
-
-- Pulls provider usage/quota directly from their usage endpoints.
-- No estimated costs; only the provider-reported windows.
-
-## Where it shows up
-
-- `/status` in chats: emoji‑rich status card with session tokens + estimated cost (API key only). Provider usage shows for the **current model provider** when available.
-- `/usage off|tokens|full` in chats: per-response usage footer (OAuth shows tokens only).
-- `/usage cost` in chats: local cost summary aggregated from OpenClaw session logs.
-- CLI: `openclaw status --usage` prints a full per-provider breakdown.
-- CLI: `openclaw channels list` prints the same usage snapshot alongside provider config (use `--no-usage` to skip).
-- macOS menu bar: “Usage” section under Context (only if available).
-
-## Providers + credentials
-
-- **Anthropic (Claude)**: OAuth tokens in auth profiles.
-- **GitHub Copilot**: OAuth tokens in auth profiles.
-- **Gemini CLI**: OAuth tokens in auth profiles.
-- **Antigravity**: OAuth tokens in auth profiles.
-- **OpenAI Codex**: OAuth tokens in auth profiles (accountId used when present).
-- **MiniMax**: API key (coding plan key; `MINIMAX_CODE_PLAN_KEY` or `MINIMAX_API_KEY`); uses the 5‑hour coding plan window.
-- **z.ai**: API key via env/config/auth store.
-
-Usage is hidden if no matching OAuth/API credentials exist.