Rename to claudify, add docs and .deb packaging

- Rename package from claude-app to claudify (v0.1.0)
- Add README.md with install/usage instructions
- Add CLAUDE.md with architecture, build, and known issues
- Add .desktop file for application menu integration
- Build target set to .deb only
- Remove failed CSD button workarounds, document upstream bug
- Remove gtk dependency (no longer needed)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -0,0 +1,51 @@
+# Claudify
+
+Native desktop wrapper for [claude.ai](https://claude.ai) built with Tauri v2 and WebKitGTK.
+
+## Architecture
+
+- **Tauri v2** with Rust backend, system WebKitGTK webview on Linux
+- **Direct webview navigation** to `https://claude.ai` (not iframe — claude.ai blocks iframes via CSP)
+- **No frontend code** — `src/index.html` is a placeholder required by Tauri's build system; the actual UI is claude.ai loaded via `WebviewUrl::External`
+- All app logic lives in `src-tauri/src/lib.rs` inside the `setup()` closure
+
+## Key Files
+
+| File | Purpose |
+|------|---------|
+| `src-tauri/src/lib.rs` | All app logic: window, tray, notifications, navigation filter |
+| `src-tauri/src/main.rs` | Entry point, calls `claudify::run()` |
+| `src-tauri/tauri.conf.json` | Tauri config: app identity, bundle targets, security |
+| `src-tauri/capabilities/` | Tauri v2 permission grants for local window and remote claude.ai |
+| `src-tauri/Cargo.toml` | Rust dependencies |
+
+## Building
+
+### Prerequisites
+
+```bash
+# Debian/Ubuntu system packages
+sudo apt install libwebkit2gtk-4.1-dev libxdo-dev librsvg2-dev libayatana-appindicator3-dev
+
+# Tauri CLI
+cargo install tauri-cli --version "^2.0" --locked
+```
+
+### Build
+
+```bash
+cargo tauri build        # Produces .deb in target/release/bundle/deb/
+cargo tauri dev          # Development mode with hot reload
+```
+
+## Known Issues
+
+- **CSD titlebar buttons non-interactive after hide/show** — Upstream bug in TAO's client-side decoration handling. Titlebar buttons (minimize/maximize/close) become unresponsive after the window is hidden to tray and restored. The close button still works via the tray menu. No known workaround — GTK decoration layout overrides, header bar replacement, resize nudges, and present() were all attempted without success. Tracked at:
+  - https://github.com/tauri-apps/tauri/issues/11856
+  - https://github.com/tauri-apps/tao/issues/1046
+
+## Conventions
+
+- Keep all app logic in `lib.rs` — avoid splitting into multiple modules unless complexity demands it
+- Navigation allowlist in `is_allowed_navigation()` — add new OAuth providers here if needed
+- Test changes with `cargo tauri dev` before building .deb