docs(user): dashboard, browsing, profile rewrites + new podcasts guide; trash stubs

Ground-truthed against the templates this pass:
- dashboard.md: real section kinds (system shelves incl. Continue
  Series, user collections, custom sections via /custom-section
  builder), Customize Dashboard panel semantics (per-library, drag,
  switches, 10-50 items, Save Changes), Refresh, This Week widget,
  per-item Read/Listen and progress-conflict resolve actions. The old
  page listed a wrong shelf set and never mentioned custom sections.
- library-browsing.md: the file was secretly titled 'Saving Custom
  Filters' and covered nothing else. Now the browsing page: All Books
  toolbar (search, Sort, Filters -> drawer hand-off, Save/Load/Clear
  saved filters), book detail as hub, series pages, podcasts split.
- profile-guide.md: field table ground-truthed from profile_form.templ
  (username/email DO remain editable there), audio defaults (speed,
  resume rewind, keep awake), timezone rendering contract, both theme
  doors (7-pick select vs 37-theme Appearance panel), Change Password
  with live checks, Danger Zone/Remove My Account + last-admin rule.
- podcasts.md NEW: the Podcasts page had zero documentation. Subscribing
  (Add Feed -> RSS URL, library, back-catalog download, download order,
  Add & Subscribe), Continue/All Feeds, Download All, player + Play as
  Sequence cross-link.
- Trashed user-areas.md, frontend-guide.md, settings-guide.md: stubs
  whose planned content now exists as real pages (or duplicates
  profile-guide). user-guide.md rewritten as the plain-language front
  door with a go-here-when table; index.md rows updated to match.
- ui-controls.md: 10 new gate-checked entries for every newly cited
  control (Add & Subscribe via templ-entity fragment).

docs/user/user-guide.md

@@ -1,79 +1,47 @@
-# User Documentation
+# Bookhoard — start here
 
-Welcome to the Bookhoard user documentation. This section contains guides for using Bookhoard features, setting up devices, and configuring sync.
+Bookhoard is a self-hosted home for the things you read and hear: your book
+libraries live on your own server, you read them in the browser or on your
+devices, and everything keeps track of where you are.
 
-## 📱 Device Setup
+The moving parts, in one breath:
 
-Learn how to configure your e-reader devices to sync with Bookhoard:
+- **Libraries** hold your books (and your podcasts run as feeds of their own)
+- The **dashboard** is your home screen — shelves that update themselves
+- **Collections** are shelves you build, by hand or by rules
+- **Filters** answer "which books match?" — the same rules power saved
+  filters, smart collections, and dashboard shelves
+- **Devices** — the Android app, KOReader on e-readers, and stock Kobo
+  firmware — stay in step with the server through **sync**
+- Your **profile** holds your preferences: theme, playback defaults, password
 
-- **[Android App Guide](devices/android-app.md)** - The native Android client
-  - Installing and upgrading the APK
-  - Connecting to a self-hosted server over LAN
-  - The Android 16+ local-network permission
-  - Troubleshooting login failures
+## Where to go
 
-- **[KOReader Setup Guide](devices/koreader-setup.md)** - Complete guide for KOReader
-  - Installation on Kindle/Kobo/PocketBook
-  - Plugin setup with server-side device approval
-  - Progress, bookmark, highlight, and note sync
-  - OPDS catalog access
-  - Troubleshooting
+| You want to... | Read |
+| --- | --- |
+| Learn the layout: dashboard, shelves, customizing | [Dashboard](dashboard.md) |
+| Browse, search, and sort your books | [Browsing your library](library-browsing.md) |
+| Build shelves — by hand or with rules | [Collections](collections.md) |
+| Narrow with rules, save them, reuse them | [Filters — the complete guide](filters/index.md) |
+| Subscribe to shows, download, listen | [Podcasts](podcasts.md) |
+| Read and annotate in the browser | [Web Reader Guide](reader-guide.md) |
+| Change themes and bookshelf textures | [Themes and Wood Paneling](themes.md) |
+| Edit your account, password, playback defaults | [Your profile](profile-guide.md) |
+| Get the Android app talking to your server | [Android App](devices/android-app.md) |
+| Use KOReader on an e-reader | [KOReader Setup](devices/koreader-setup.md) |
+| Use a Kobo | [Kobo Setup](devices/kobo-setup.md) |
+| Understand how it all stays in sync | [Universal Sync Guide](sync-guide.md) |
+| Import from Calibre | [Calibre Integration](calibre-integration.md) |
 
-- **[Kobo Setup Guide](devices/kobo-setup.md)** - Native Kobo sync (coming soon)
-  - In the meantime, KOReader works great on Kobo hardware
+New here? The usual path is: browse [your library](library-browsing.md),
+open a book, and let the [dashboard](dashboard.md) keep track of you. Sync
+comes when you add a [device](devices/android-app.md).
 
-## 🔄 Sync Configuration
+## A note on admins
 
-- **[Universal Sync Guide](sync-guide.md)** - Understanding and using sync features
-  - What is Universal Sync?
-  - Supported devices
-  - Book matching and auto-linking
-  - Conflict resolution
-  - Best practices
+Some screens (user management, server settings, library folders) are admin
+territory; [Admin Guide](admin-guide.md) is the door, and the admin docs are
+being expanded separately.
 
-## 📚 Calibre Integration
-
-- **[Calibre Integration Guide](calibre-integration.md)** - Integrating with Calibre libraries
-  - What is Calibre?
-  - Automatic metadata import
-  - Setting up your Calibre library
-  - Supported metadata and file types
-  - Workflow examples
-  - 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
-
-- _Coming Soon_
-
-## 👤 User Areas
-
-**[User Areas Guide](user-areas.md)** - Managing your personal library and settings
-
-- _Coming Soon_
-
-## ⚙️ Settings
-
-**[Settings Guide](settings-guide.md)** - Configuring your Bookhoard preferences
-
-- _Coming Soon_
-
-## 🔐 Admin Features
-
-**[Admin Guide](admin-guide.md)** - Administrative functions and management
-
-- _Coming Soon_
-
----
-
-**Looking for developer documentation?** See the [Developer Portal](../developer/development.md)
+**Looking for developer documentation?** See the
+[Developer Portal](../developer/development.md).