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.

docs/code-review-2026-04-22.md

@@ -1,14 +1,14 @@
 ---
 name: Code Review — 2026/04/22
-description: Full-sweep audit findings across all Kon crates + src-tauri, with triage buckets for quick wins vs release-blockers
+description: Full-sweep audit findings across all Magnotia crates + src-tauri, with triage buckets for quick wins vs release-blockers
 type: reference
-tags: [code-review, audit, bugs, kon, release-blockers]
+tags: [code-review, audit, bugs, magnotia, release-blockers]
 date: 2026/04/22
 ---
 
-# Kon Code Review — 2026/04/22
+# Magnotia Code Review — 2026/04/22
 
-Full-sweep read-only audit of every `.rs` file across the Kon workspace. Four parallel Codex agents scanned:
+Full-sweep read-only audit of every `.rs` file across the Magnotia workspace. Four parallel Codex agents scanned:
 - **Agent A** — `crates/transcription/`, `crates/audio/`
 - **Agent B** — `crates/ai-formatting/`, `crates/llm/`, `crates/storage/`
 - **Agent C** — `src-tauri/src/` (commands layer + lib.rs + main.rs + types.rs)