chore: rebrand from Kon/Corbie to Magnotia

Replace all instances of the legacy product names "Kon" and "Corbie" with
"Magnotia" across user-facing copy, code identifiers, package names, bundle
ids, file paths, and documentation. Preserves the unrelated "konsole" (KDE
terminal) reference and the parent CORBEL company name.

- Renames 10 Rust crates (kon-* → magnotia-*) and the tauri binary
- Updates package.json, tauri.conf.json (productName + identifier)
- Renames CSS classes (kon-rh-* → magnotia-rh-*) and animations
- Renames brand and roadmap docs
- Regenerates Cargo.lock and package-lock.json

Verified: svelte-check passes; pure-rust crates compile under new names.

src-tauri/src/commands/hotkey.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use tauri::Emitter;
 use tokio::sync::{mpsc, Mutex};
 
-use kon_hotkey::{EvdevHotkeyListener, HotkeyCombo, HotkeyEvent};
+use magnotia_hotkey::{EvdevHotkeyListener, HotkeyCombo, HotkeyEvent};
 
 /// Managed state for the evdev hotkey listener.
 pub struct HotkeyState {
@@ -30,11 +30,11 @@ pub fn is_wayland_session() -> bool {
 /// Check whether evdev hotkey capture is available (user in `input` group, etc.).
 #[tauri::command]
 pub fn check_hotkey_access() -> Result<(), String> {
-    kon_hotkey::check_evdev_access()
+    magnotia_hotkey::check_evdev_access()
 }
 
-/// Start the evdev global hotkey listener. Emits "kon:hotkey-pressed" and
-/// "kon:hotkey-released" events to the frontend.
+/// Start the evdev global hotkey listener. Emits "magnotia:hotkey-pressed" and
+/// "magnotia:hotkey-released" events to the frontend.
 ///
 /// If a listener is already running, it is stopped first.
 #[tauri::command]
@@ -64,10 +64,10 @@ pub async fn start_evdev_hotkey(
         while let Some(event) = event_rx.recv().await {
             match event {
                 HotkeyEvent::Pressed => {
-                    let _ = app_clone.emit("kon:hotkey-pressed", ());
+                    let _ = app_clone.emit("magnotia:hotkey-pressed", ());
                 }
                 HotkeyEvent::Released => {
-                    let _ = app_clone.emit("kon:hotkey-released", ());
+                    let _ = app_clone.emit("magnotia:hotkey-released", ());
                 }
             }
         }