feat(keys): one-paste harness setup — Claude Code, Codex, OpenCode, Continue, Cline

The "connect your app" card in the API-keys view now leads with auto-setup
scripts for popular coding harnesses, each pre-filled with this gateway's URL
and the freshly created key:

  Claude Code — env exports (the gateway speaks Anthropic /v1/messages
      natively; the protocol is now ON by default, and when a config has it
      off the tab shows a warning with a one-click Enable button)
  Codex — appends a [model_providers.cortiq] block to ~/.codex/config.toml
  OpenCode — writes the provider into opencode.json
  Continue — appends the model to ~/.continue/config.yaml
  Cline — the exact values to paste into the extension settings

The gateway also detects which harnesses are already present on its machine
(binaries across PATH + common install dirs, config files under home) via
GET /admin/api/harnesses: installed tabs get a ✓, and the status line under
the snippet says "installed" or "already configured for this gateway" when
the harness config mentions cortiq. Works on Linux/macOS/Windows.

curl / python / javascript SDK snippets stay as before. 16 new strings in
all 7 languages.

web/js/i18n/zh.js

@@ -602,4 +602,18 @@ export default {
   "bm.spent": "花费",
   "bm.verdict": "🏁 完成：回答 {p}，花费 {s}",
   "bm.clearHistory": "全部清除",
+
+  // harness auto-setup (API keys view)
+  "keys.h.claude": "Claude Code — 粘贴到终端（网关原生支持 Anthropic 协议）：",
+  "keys.h.codex": "Codex — 将提供商追加到 ~/.codex/config.toml 并启动：",
+  "keys.h.opencode": "OpenCode — 写入 ~/.config/opencode/opencode.json（会覆盖！）并启动：",
+  "keys.h.continue": "Continue（VS Code / JetBrains）— 将模型追加到 ~/.continue/config.yaml：",
+  "keys.h.cline1": "Cline（VS Code）— 在扩展设置中选择：",
+  "keys.h.cline2": "设置 → API Provider → OpenAI Compatible，然后粘贴上面的值。",
+  "keys.h.note": "cortiq-auto = 智能路由：路由器为每个请求选择模型。要固定某个模型，请填写其精确名称。Windows 上请在 Git Bash / WSL 中运行脚本，或通过系统环境变量设置相同的值。",
+  "keys.h.protoOff": "Anthropic 协议（/v1/messages）已关闭 — Claude Code 无法连接。",
+  "keys.h.enableProto": "启用",
+  "keys.h.st.installed": "已安装在网关所在机器上",
+  "keys.h.st.configured": "已配置为使用此网关",
+  "keys.h.st.notFound": "网关所在机器上未找到",
 };