docs: update all READMEs for v1.1.0

Add Electron desktop app section, document all 8 plugins, update
features list (assets, super-buckets, find/replace, arrow nav, PDF
upload), fix relay docs (chat shipped, not future), add missing API
endpoints, correct electron data storage paths and php-bin fetch info.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

@@ -110,10 +110,23 @@ hyprcrd/
 │   │   └── vendor/         # marked.js, DOMPurify
 │   ├── plugins/            # Optional, drop-in plugin folders
 │   │   ├── canvas/         # ASCII art canvas editor
+│   │   ├── chat/           # Encrypted relay chat
+│   │   ├── collab-buckets/ # Collaborative bucket sync
+│   │   ├── email/          # Email overlay
+│   │   ├── gitea/          # Gitea issue integration
+│   │   ├── logseq-import/  # Logseq markdown importer
+│   │   ├── slideshow/      # Presentation mode
 │   │   └── tests/          # UI + state test runner
 │   └── uploads/            # User media (writable)
-├── relay/                  # Relay service (mobile inbox + card sharing)
-│   ├── index.php           # Single-file API + Mobile UI
+├── electron/               # Electron desktop app wrapper
+│   ├── main.js             # Spawns PHP, creates BrowserWindow
+│   ├── router.php          # PHP built-in server router
+│   ├── fetch-php.sh        # Downloads static PHP binaries
+│   └── php-bin/            # Platform-specific PHP binaries
+├── relay/                  # Relay service (multi-tenant messaging + collab)
+│   ├── index.php           # Entry point + API dispatch
+│   ├── inc/                # Backend modules (bootstrap, crypto, auth, routes)
+│   ├── ui/                 # Frontend (layout.php, style.css, app.js)
 │   ├── .htaccess           # URL rewriting + data protection
 │   ├── Dockerfile
 │   └── dist.sh             # Build relay distribution ZIP
@@ -128,7 +141,7 @@ hyprcrd/
 - **Tags** written as `#tagname` or hierarchical `#parent/child` in card body, extracted automatically
 - **Markdown** with `[[Card Title]]` wiki-links, ```` ```gallery ```` image galleries, ```` ```tree ```` list views, ```` ```ascii ```` art canvas (via canvas plugin)
 - **Search** combining text and `#tag` filters (e.g. `#project meeting notes`)
-- **Image gallery** with orphan detection and fullscreen viewer
+- **Assets gallery** (images, audio, PDFs) with orphan detection and fullscreen viewer
 - **Split view** showing tag-related and content-related cards
 - **Import/Export** as JSON+media ZIP or Obsidian/Logseq-compatible markdown vault
 - **Drag & drop** card reordering and grouping
@@ -141,7 +154,14 @@ hyprcrd/
 - **Notification banner** for upcoming events, birthdays, overdue tasks
 - **Board split view** with side-by-side preview
 - **Superview** compact multi-column list with hover cards
-- **Keyboard shortcuts**: `Ctrl+K` search, `F1` help, `Shift+scroll` zoom, arrow keys in autocomplete
+- **Super-buckets** — nest buckets one level deep with a dropdown for children
+- **Card groups** — drag-to-group, join multiple cards, dissolve
+- **Context menu** — color, tags, copy text, mark done, join cards, make ticket (gitea)
+- **Find & replace** — in-card (Ctrl+H) and across all cards (Ctrl+Shift+H via search)
+- **Arrow key navigation** on the board with Enter to open
+- **PDF upload** in the editor toolbar
+- **Keyboard shortcuts**: `Ctrl+K` search, `F1` help, `?` shortcut reference, arrow keys, 1–9 bucket switch
+- **Electron desktop app** — standalone AppImage/DMG/NSIS with bundled PHP, no server needed
 
 ## Plugins
 
@@ -150,7 +170,13 @@ hyprcrd has a drop-in plugin system. A plugin is just a folder under `public/plu
 ### Bundled plugins
 
 - **`canvas/`** — ASCII art canvas editor. Adds a toolbar button + ` ```ascii ` fenced block. Draw with brush, line, rectangle, ellipse, fill, and text tools using a monospace character grid.
-- **`tests/`** — UI + state test runner (40+ test files). Loaded only when `?test` is in the URL or `Ctrl+Shift+T` is pressed, so production users pay no cost for it.
+- **`chat/`** — Encrypted chat between relay tenants. Footer flyout with delivery + read receipts.
+- **`collab-buckets/`** — Collaborative buckets shared between relay tenants with exclusive card locking and E2E encrypted sync.
+- **`email/`** — Email overlay (toggled with `M` key).
+- **`gitea/`** — Gitea integration: create issues from cards, link to repos.
+- **`slideshow/`** — Slideshow presentation mode for cards with `slide-image` blocks.
+- **`logseq-import/`** — Import Logseq markdown journals and pages.
+- **`tests/`** — UI + state test runner (40+ test files). Loaded only when `Ctrl+Shift+Alt+T` is pressed, so production users pay no cost for it.
 
 ### Plugin layout
 
@@ -417,9 +443,8 @@ Starts hyprcrd on `http://localhost:8088` and the relay on `http://localhost:808
   master key lives outside the DB in a chmod-600 file
 - **24-hour ephemeral**: messages and attachments auto-delete after a
   day. Cards extracted in hyprcrd are the long-term store
-- **Future: end-to-end encrypted chat** between tenants is planned and
-  will require per-pair key exchange — see `relay/README.md` for the
-  roadmap
+- **Encrypted chat**: tenant-to-tenant chat with delivery + read receipts
+  (via chat plugin). Per-pair E2E key exchange is on the roadmap
 
 ### Relay Security
 
@@ -451,6 +476,26 @@ your next visit. You'll need to:
 The old `relay_key` was bcrypt-hashed and cannot be recovered, so all
 client secrets need to be reissued.
 
+## Electron Desktop App
+
+hyprcrd can run as a standalone desktop app via Electron — no web server needed.
+
+```bash
+cd electron
+./fetch-php.sh     # download static PHP binary (~20MB)
+npm install
+npm start          # dev mode
+npm run dist       # build AppImage / DMG / NSIS
+```
+
+The app bundles a static PHP binary per platform and stores user data (database + uploads) outside the app bundle:
+
+- **Linux**: `~/.config/hyprcrd/data/`
+- **macOS**: `~/Library/Application Support/hyprcrd/data/`
+- **Windows**: `%APPDATA%/hyprcrd/data/`
+
+See [`electron/README.md`](electron/README.md) for details.
+
 ## Rebuilding Tailwind CSS
 
 After changing Tailwind utility classes in HTML or JS files: