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/Cargo.toml

@@ -1,22 +1,22 @@
 [package]
-name = "kon"
+name = "magnotia"
 version = "0.1.0"
-description = "Kon — Think out loud"
+description = "Magnotia — Think out loud"
 authors = ["CORBEL Ltd"]
 edition = "2021"
 
 [lib]
-name = "kon_lib"
+name = "magnotia_lib"
 crate-type = ["staticlib", "cdylib", "rlib"]
 
 [features]
 # Default build includes the Whisper backend. Disabling this feature
-# also drops it from kon-transcription (see Cargo.toml in that crate)
+# also drops it from magnotia-transcription (see Cargo.toml in that crate)
 # so a --no-default-features workspace build does not pull whisper-rs-sys.
 # load_model_from_disk returns a runtime error for Engine::Whisper when
 # this feature is off; Parakeet continues to work.
 default = ["whisper"]
-whisper = ["kon-transcription/whisper"]
+whisper = ["magnotia-transcription/whisper"]
 
 [build-dependencies]
 tauri-build = { version = "2", features = [] }
@@ -28,14 +28,14 @@ serde_json = "1"
 
 [dependencies]
 # Workspace crates
-kon-core = { path = "../crates/core" }
-kon-audio = { path = "../crates/audio" }
-kon-transcription = { path = "../crates/transcription", default-features = false }
-kon-ai-formatting = { path = "../crates/ai-formatting" }
-kon-storage = { path = "../crates/storage" }
-kon-cloud-providers = { path = "../crates/cloud-providers" }
-kon-hotkey = { path = "../crates/hotkey" }
-kon-llm = { path = "../crates/llm" }
+magnotia-core = { path = "../crates/core" }
+magnotia-audio = { path = "../crates/audio" }
+magnotia-transcription = { path = "../crates/transcription", default-features = false }
+magnotia-ai-formatting = { path = "../crates/ai-formatting" }
+magnotia-storage = { path = "../crates/storage" }
+magnotia-cloud-providers = { path = "../crates/cloud-providers" }
+magnotia-hotkey = { path = "../crates/hotkey" }
+magnotia-llm = { path = "../crates/llm" }
 
 # Tauri. The `tray-icon` feature, the global-shortcut/window-state/
 # autostart plugins are desktop-only — gated below under
@@ -90,7 +90,7 @@ tempfile = "3"
 tauri = { version = "2", features = ["tray-icon"] }
 tauri-plugin-global-shortcut = "2"
 tauri-plugin-window-state = "2"
-# Phase 5 rituals: register Corbie as a login-time autostart entry.
+# Phase 5 rituals: register Magnotia as a login-time autostart entry.
 # Handles platform differences (.desktop file on Linux, LaunchAgents plist
 # on macOS, registry Run key on Windows) behind a single API.
 tauri-plugin-autostart = "2"