docs: install.md 恢复有用细节，保留简洁指令

保留：
- Cookie 配置步骤（需要用户操作，Agent 做不了）
- 代理配置说明（含推荐服务商）
- 完整命令参考表（12 条命令）
- 自动安装说明

去掉的只有：9 行排错对照表（Agent 自己能搞定）

docs/install.md

@@ -16,28 +16,51 @@ Copy this to your AI Agent:
 
 Install Agent Reach and make sure **all channels are working**. Your user expects you to have full internet access capabilities when this is done — reading tweets, searching Reddit, watching YouTube, browsing GitHub, and more.
 
-### Install
+### Step 1: Install
 
 ```bash
 pip install https://github.com/Panniantong/agent-reach/archive/main.zip
 agent-reach install --env=auto
 ```
 
+This auto-installs system dependencies (gh CLI, Node.js, mcporter, birdx), configures Exa search, detects environment, and tests all channels.
+
 **Read the output carefully**, then run:
 
 ```bash
 agent-reach doctor
 ```
 
-### Your Job
+### Step 2: Fix what's broken
 
 `agent-reach doctor` shows you which channels are active and which aren't.
 
-**Your goal is to get as many channels to ✅ as possible.** If something failed during install or shows as ❌/⚠️ in doctor, fix it yourself. You're a capable AI Agent — diagnose the problem, try alternative approaches, search for solutions, and iterate until it works.
+**Your goal is to get as many channels to ✅ as possible.** If something failed during install or shows as ❌/⚠️ in doctor, fix it yourself. You're a capable AI Agent — diagnose the problem, try alternative approaches, and iterate until it works.
 
-Only ask the user when you genuinely need their input — things like API keys, browser cookies, proxy credentials, or account passwords that you can't generate yourself.
+Only ask the user when you genuinely need their input (see below).
 
-When you're done, run `agent-reach doctor` one final time and report the results to your user.
+### Step 3: Configure things that need user input
+
+Some channels need credentials only the user can provide. Based on the doctor output, ask for what's missing:
+
+**Twitter search & posting (server users):**
+> "To unlock Twitter search, I need your Twitter cookies. Install the Cookie-Editor Chrome extension, go to x.com/twitter.com, click the extension → Export → Header String, and paste it to me."
+> Extension: https://chromewebstore.google.com/detail/cookie-editor/hlkenndednhfkekhgcdicdfddnkalmdm
+
+```bash
+agent-reach configure twitter-cookies "PASTED_STRING"
+```
+
+**Reddit & Bilibili full access (server users):**
+> "Reddit and Bilibili block server IPs. To unlock full access, I need a residential proxy. You can get one at https://webshare.io ($1/month). Send me the proxy address."
+
+```bash
+agent-reach configure proxy http://user:pass@ip:port
+```
+
+### Step 4: Final check
+
+Run `agent-reach doctor` one final time and report the results to your user.
 
 ---
 
@@ -45,9 +68,15 @@ When you're done, run `agent-reach doctor` one final time and report the results
 
 | Command | What it does |
 |---------|-------------|
-| `agent-reach install --env=auto` | Full auto-setup |
+| `agent-reach install --env=auto` | Full auto-setup (installs deps + configures) |
 | `agent-reach doctor` | Show channel status |
+| `agent-reach configure twitter-cookies "..."` | Unlock Twitter search + posting |
 | `agent-reach configure proxy URL` | Unlock Reddit + Bilibili on servers |
-| `agent-reach configure twitter-cookies "..."` | Unlock Twitter search |
 | `agent-reach read <url>` | Read any URL |
 | `agent-reach search "query"` | Search the web |
+| `agent-reach search-reddit "query"` | Search Reddit |
+| `agent-reach search-twitter "query"` | Search Twitter |
+| `agent-reach search-github "query"` | Search GitHub |
+| `agent-reach search-youtube "query"` | Search YouTube |
+| `agent-reach search-bilibili "query"` | Search Bilibili |
+| `agent-reach search-xhs "query"` | Search XiaoHongShu |