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/profiles.rs

@@ -1,5 +1,5 @@
-// Tauri commands wrapping kon_storage profile + profile_term CRUD.
-// Pattern mirrors tasks.rs — flat imports from `kon_storage` with a `db_`
+// Tauri commands wrapping magnotia_storage profile + profile_term CRUD.
+// Pattern mirrors tasks.rs — flat imports from `magnotia_storage` with a `db_`
 // alias prefix to avoid name collisions with the command functions, plain
 // snake_case parameters (Tauri 2.x auto-converts camelCase JS keys),
 // `.map_err(|e| e.to_string())` for error conversion, and camelCase DTOs
@@ -11,8 +11,8 @@
 
 use serde::Serialize;
 
-use kon_ai_formatting::extract_corrections;
-use kon_storage::{
+use magnotia_ai_formatting::extract_corrections;
+use magnotia_storage::{
     add_profile_term as db_add_profile_term, create_profile as db_create_profile,
     delete_profile as db_delete_profile, delete_profile_term as db_delete_profile_term,
     get_profile as db_get_profile, list_profile_terms as db_list_profile_terms,