docs: 补充 v1.2.7 登录验证（滑块 / Turnstile / Cap）文档

docs-site/en/guide/configuration.md

@@ -13,6 +13,7 @@ Configure PicHost via environment variables (Docker / `.env`) or the in-app **Se
 | Short image links | SQLite → env → default false | No |
 | Date-based paths | SQLite → env → default true | No |
 | Global auto-delete days | SQLite → env → default 0 | No |
+| Login verification | SQLite (Settings → Access control) | No |
 
 ## Variables
 
@@ -64,6 +65,18 @@ Delete images older than N days globally; `0` disables. Affects **new uploads af
 
 Local dev only: `true` bypasses login. Never use in production.
 
+### Login verification (Settings only)
+
+Configure under **Settings → Access control** (stored in SQLite; no env vars):
+
+| Method | Notes |
+| ------ | ----- |
+| **Local slider** (default) | No third-party service |
+| **Cloudflare Turnstile** | Site key + secret key |
+| **Cap** | API endpoint + secret |
+
+Login and registration share the same method. If misconfigured: `docker exec pichost slider` (or `npm run slider`) resets to the slider.
+
 ### Storage backends (optional)
 
 Admins usually add backends in **Storage** UI; env vars such as `STORAGE_BACKEND=s3` and `S3_*` are also supported. See [Storage](./storage.md).
@@ -99,5 +112,6 @@ Restart the container after changing env vars.
 | Date-based paths | `STORAGE_USE_DATE_PATH` / `STORAGE_LAYOUT` |
 | WebP quality | `WEBP_QUALITY` |
 | Auto-delete | `AUTO_DELETE_DAYS` |
+| Login verification | (Settings → Access control only) |
 
 Template: [`.env.example`](https://github.com/O96u/PicHost/blob/main/.env.example) in the repo root.

docs-site/en/guide/getting-started.md

@@ -39,11 +39,23 @@ See `docker-compose.yml` in the repository.
 
 ## Sign in
 
-Management pages (upload, gallery, settings, etc.) require login. Enter username and password, **drag the slider to align with the gap**, then click **Sign in**.
+Management pages (upload, gallery, settings, etc.) require login. Enter username and password, complete the verification challenge, then click **Sign in**.
+
+The default is a **local slider** (align the thumb with the gap). Admins can switch to **Cloudflare Turnstile** or **Cap** under **Settings → Access control**, with the matching site key / secret or API endpoint.
 
 ![Login](/screenshots/login.png)
 
-If registration is enabled, create an account from the register page. Legacy deployments may still use a secret key (see the on-screen hint).
+If registration is enabled, create an account from the register page (same verification). Legacy deployments may still use a secret key (see the on-screen hint).
+
+### Locked out of verification
+
+If Turnstile / Cap is misconfigured and you cannot sign in, reset to the local slider on the server:
+
+```bash
+docker exec pichost slider
+```
+
+Local dev: `npm run slider`
 
 ## Forgot password
 

docs-site/en/guide/local-dev.md

@@ -28,6 +28,7 @@ Open `http://localhost:3000/setup` to create the admin account. Data directory d
 | `npm run typecheck` | Type check |
 | `npm test` | Unit tests |
 | `npm run reset-password` | Reset password (optional username) |
+| `npm run slider` | Reset login verification to local slider |
 | `npm run migrate` | Preview legacy dir migration (`-- --apply` to run) |
 
 ## Dev-only variables

docs-site/en/guide/users-and-permissions.md

@@ -12,6 +12,7 @@ PicHost uses role-based access control (RBAC): **admin** and **user**. Enforceme
 | Storage management (`/storage`) | ✓ | — |
 | System settings (`/settings`) | ✓ | — |
 | Allow registration | ✓ | — |
+| Login verification (slider / Turnstile / Cap) | ✓ | — |
 | Global API token | ✓ | — |
 | Personal API token | ✓ | ✓ |
 | Gallery stats overview (incl. user count) | ✓ | partial |
@@ -34,7 +35,8 @@ Regular users see **API**, **Gallery** in the nav; user menu: **Change password*
 
 - By default only admins create users; **allow registration** is an admin setting
 - Passwords hashed with scrypt
-- Web login requires a slider captcha (align the thumb with the gap)
+- Web login/register requires verification: local slider by default; admins can switch to Turnstile or Cap under **Settings → Access control**
+- If verification is misconfigured: `docker exec pichost slider` resets to the local slider
 - Login rate limiting
 
 ## Upload preferences & auto-delete