docs: add FAQ/security/changelog

docs/CHANGELOG.md

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+# Changelog
+
+This is a user-facing summary derived from `DEVLOG.md`.
+
+## v0.7.6
+- Docs: annotated screenshots with arrows for key UI controls.
+
+## v0.7.5
+- Docs: built-in CLI terminal instructions + screenshot (tab completion, favorites, streaming output).
+
+## v0.7.4
+- Docs: English + Chinese usage guides with redacted screenshots.
+
+## v0.7.1
+- Dashboard guidance block for Telegram-first workflow + safety checklist.
+- Model dropdown options sourced from `openclaw models list`.
+
+## v0.7.0
+- Dashboard redesign with circular CPU/RAM/DISK gauges and auto-refresh.
+- Sub-agent creation flow rewritten (BotFather → group → group id → form) including allowlist helper.
+
+## v0.6.6
+- Fix: sub-agents correctly grouped under main for older config formats.
+
+## v0.6.5
+- New Dashboard tab + cache-busting headers and version checks.

docs/FAQ.md

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+# OCM FAQ
+
+## Q: Telegram 群里经常显示 typing，但不回消息？
+
+Most common cause is **BotFather Group Privacy** being ON.
+
+Fix:
+- BotFather → Your bot → Bot Settings → **Group Privacy** → **Turn off**
+
+Also check:
+- `openclaw status` (gateway healthy?)
+- provider auth/rate limits (OCM → Auth page, and gateway logs)
+
+## Q: 如何获取 Telegram Group ID（Peer ID / -100...）？
+
+Typical workflow:
+
+```bash
+openclaw gateway logs --follow
+```
+
+Send a message in the target group; the gateway logs usually contain the peer id.
+
+## Q: 模型下拉列表为什么没有我想要的模型？
+
+OCM sources model options from the real CLI output:
+
+```bash
+openclaw models list
+```
+
+So if it doesn't show up in OCM, make sure it's registered/available in your OpenClaw environment.
+
+## Q: Dashboard 里 Gateway HTTP Ping 显示 Unreachable？
+
+Common reasons:
+- Gateway not running
+- Gateway binds to a different interface/port than OCM expects
+- Local firewall/proxy interference
+
+Try:
+- `openclaw status`
+- `openclaw gateway restart`
+
+## Q: OCM 会把我的 token/个人信息上传出去吗？
+
+OCM is designed as a **local** dashboard.
+
+That said, your local OpenClaw config contains sensitive information. Follow the safety guidance:
+- keep agent Telegram groups private
+- don't share raw screenshots without redaction
+
+See: `docs/SECURITY.md`.

docs/SECURITY.md

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+# Security Notes
+
+OCM is a **local web UI** for managing OpenClaw. Security depends heavily on how you run OpenClaw and how you use Telegram.
+
+## Recommended defaults
+
+- **Run locally** and restrict host binding unless you intentionally expose it.
+- Treat OpenClaw config as secrets: tokens, provider keys, account ids.
+- Prefer separate workspaces for each agent/sub-agent.
+
+## Telegram safety
+
+Strongly recommended:
+
+- **One Telegram group = one agent boundary** (context + purpose + workspace)
+- Keep each agent group **private**: only you + the bot (and optionally your second account)
+- Do **not** invite other people (cost + security risk)
+
+Critical BotFather settings:
+- Allow Groups = ON
+- Group Privacy = OFF
+
+## Sharing screenshots
+
+If you share screenshots publicly:
+- blur personal paths (e.g. `/Users/<name>/...`)
+- blur Telegram group/peer IDs (e.g. `-100xxxxxxxxxx`)
+- blur any tokens/keys if visible
+
+This repo contains **redacted + annotated** screenshots under `docs/annotated-screenshots/`.