docs(user): web reader guide — navigation, touch selection, highlights

User-facing documentation for the rebuilt web reader (§6.5 of the app
handoff): swipe-to-page / tap-for-menu touch navigation, long-press word
selection with drag extension and handles, the selection popover (color
dots, notes with save-together-on-create, copy incl. plain-HTTP LAN,
edit/delete by tapping a painted highlight), below-the-selection popover
placement rationale, PDF/comic behavior, and annotations drawer.
Linked from the user documentation portal and the docs index quick
links / quick-find tables.

docs/index.md

@@ -77,6 +77,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 | **Deploy Bookhoard** | [Operations Portal → Troubleshooting](operations/troubleshooting.md)   |
 | **Contribute code**  | [Contributing Portal → Development Guide](contributing/development.md) |
 | **Understand sync**  | [User Portal → Sync Guide](user/sync-guide.md)                         |
+| **Read in the browser** | [User Portal → Web Reader Guide](user/reader-guide.md)              |
 
 ---
 
@@ -90,6 +91,7 @@ Complete guide to Bookhoard documentation. Find what you need quickly.
 | ...set up KOReader?         | [KOReader Setup Guide](user/devices/koreader-setup.md) |
 | ...use a Kobo?              | [Kobo Setup Guide](user/devices/kobo-setup.md) - native sync coming soon; KOReader works today |
 | ...understand sync?         | [Sync Guide](user/sync-guide.md)                       |
+| ...read in the browser?     | [Web Reader Guide](user/reader-guide.md) - reading, highlights, notes |
 | ...resolve conflicts?       | [Sync Guide](user/sync-guide.md) - Managing Conflicts  |
 | ...troubleshoot deployment? | [Troubleshooting Guide](operations/troubleshooting.md) |
 | ...use the API?             | [API Reference](developer/api-reference.md)            |

docs/user/reader-guide.md

@@ -0,0 +1,81 @@
+# Web Reader Guide
+
+Bookhoard's built-in web reader works in any modern browser — desktop or
+mobile — and keeps your position, highlights, bookmarks, and notes in sync
+with the Android app and KOReader.
+
+## Opening a Book
+
+From your library or book page, click **Read**. The reader opens in an
+immersive view with the book's cover, title, and chapter in the top bar
+(EPUB) or page number (PDF/comics).
+
+## Navigation
+
+### On a phone or tablet (touch)
+
+| Gesture | Action |
+|---|---|
+| **Swipe** left / right | Turn the page |
+| **Tap** once | Toggle the reader menu (headers, settings, drawers) |
+| **Tap** in a corner zone | With the menu open: jump back / forward by chapter |
+
+Paging is swipe-only by design: taps are reserved for the menu so a page
+turn can never fire while you're trying to select text.
+
+### On desktop
+
+- Scroll wheel, trackpad, arrow keys, or **Page Up / Page Down** to page
+- Click the progress bar (bottom, with the menu open) to jump
+- Contents drawer for the table of contents; Pages grid for PDF/comics
+
+## Text Selection & Highlights
+
+### Selecting text (touch)
+
+1. **Press and hold** a word (~half a second) until it highlights
+2. **Drag** to extend the selection word by word — it stays on the
+   visible page
+3. **Drag the round handles** (EPUB) to fine-tune the start and end
+   points
+4. Lift your finger and pause — the highlight menu appears **below** the
+   selection, underneath the browser's own copy menu
+
+The browser's address bar hides while a selection is active to give the
+page room; it returns as soon as the selection is cleared.
+
+### Creating a highlight or note
+
+With the selection menu open:
+
+- **Color dots** — tap one to highlight immediately in that color
+- **Pencil** — opens a note; write it and tap **Highlight with note**
+  to save the highlight and its note together
+- **Copy** — copies the selected text (works even over plain HTTP on
+  your LAN)
+- While the note editor is open, you can still change the color — the
+  popover stays put until you save or cancel
+
+### Editing or removing a highlight
+
+Tap anywhere on a painted highlight to reopen it in the menu. From there
+you can change its color, edit the note (pencil → **Save note**), or
+delete it (trash icon). Tapping anywhere else closes the menu.
+
+### PDFs and comics
+
+Text selection works the same way on PDFs. Highlights are stored as
+page-anchored rectangles and sync to the Android app. Comics/manga
+libraries disable annotation (bookmarks still work).
+
+## Notes & Bookmarks
+
+The **annotations drawer** (right side, from the open menu) lists your
+highlights, standalone notes, and bookmarks for the book — tap any entry
+to jump to it.
+
+## Where Reading Position Is Stored
+
+Position, highlights, bookmarks, and notes sync automatically through the
+server (see the [Sync Guide](sync-guide.md)). Close the tab whenever you
+like — the reader resumes exactly where you left off on any device.

docs/user/user-guide.md

@@ -36,6 +36,14 @@ Learn how to configure your e-reader devices to sync with Bookhoard:
   - Troubleshooting
   - Best practices
 
+## 📖 Reading
+
+- **[Web Reader Guide](reader-guide.md)** - Reading and annotating in the browser
+  - Touch navigation (swipe to page, tap for menu)
+  - Selecting text: long-press, drag, handles
+  - Highlights, notes, copy, and editing
+  - PDFs and comics
+
 ## 🎨 Frontend Guide
 
 **[Frontend Guide](frontend-guide.md)** - Learn how to use the Bookhoard web interface