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/whisper-ecosystem/workstream-A.md

@@ -35,7 +35,7 @@ lib tests and moves on; no new code.
 
 The backlog groups itself into four natural phases. Each phase lands as
 a sequence of small, one-concern commits, with `cargo test --workspace
---lib && cargo build -p kon && npm run check` green at every commit
+--lib && cargo build -p magnotia && npm run check` green at every commit
 boundary. At the end of each phase we pause for review before the next.
 
 ### Phase A.1 — Pre-emptive patches (no new UX surface)
@@ -43,7 +43,7 @@ boundary. At the end of each phase we pause for review before the next.
 | Seq | Item | Effect | Depends on |
 |---|---|---|---|
 | 1 | **#2**: pre-approve `http://127.0.0.1:*` in Tauri capabilities for LLM | Adds `http:default-scope-127.0.0.1` style capability + widens `connect-src` CSP to localhost | — |
-| 2 | **#6**: guard `whisper-rs-sys` + `tokenizers` on Windows | Audit: Kon doesn't link `tokenizers` directly; we add a `#[cfg(all(target_os = "windows"))]` compile-time assert in `kon-transcription/build.rs` that fails the build if anything in the tree pulls in `tokenizers` on Windows | — |
+| 2 | **#6**: guard `whisper-rs-sys` + `tokenizers` on Windows | Audit: Magnotia doesn't link `tokenizers` directly; we add a `#[cfg(all(target_os = "windows"))]` compile-time assert in `magnotia-transcription/build.rs` that fails the build if anything in the tree pulls in `tokenizers` on Windows | — |
 | 3 | **#7**: CPU feature detection + non-AVX2 fallback surface | Extend `crates/core/src/hardware.rs` with `CpuFeatures` (avx2, avx512, fma, sse4_2) via `std::is_x86_feature_detected!` at runtime; surface as part of `RuntimeCapabilities`; when AVX2 is absent, emit a `warning` log + `runtime-warning` event so the frontend can show a banner | #1 |
 | 4 | **#1**: detect and surface active compute device | Extend `RuntimeCapabilities` with an `ActiveComputeDevice` struct (`kind: "cuda" \| "vulkan" \| "metal" \| "cpu"`, `label: String`, `reason: Option<String>`). For Whisper, read the first `whisper_print_system_info` line via a shim in `whisper_rs_backend`; reason is filled on any CPU fallback (e.g., "Vulkan loader not found") | #7 |
 | 5 | **#8**: checksum + resumable model downloads; retain audio on failure | Port the `crates/llm/src/model_manager.rs` pattern (SHA256 verify, `.part` file resume, `ResumeUnsupported` error) into `crates/transcription/src/model_manager.rs::download_file`. The existing code already does incremental SHA256 and range resume but lacks (a) validation of an **existing full file** before re-downloading, (b) ResumeUnsupported signalling, (c) test coverage parity. Retaining audio on failure is already covered in `commands/live.rs` via `save_audio` — add an explicit retry-friendly error classification so the frontend can render "Retry transcription" (a B surface, but the error enum ships here) | — |
@@ -52,14 +52,14 @@ boundary. At the end of each phase we pause for review before the next.
 
 **Commit boundary:** `cargo test --workspace --lib` (must include new
 tests for checksum resume + CPU feature detect + active-device shim),
-`cargo build -p kon`, `npm run check`. Then **stop for review.**
+`cargo build -p magnotia`, `npm run check`. Then **stop for review.**
 
 ### Phase A.2 — Engine abstraction (#13, #19)
 
 | Seq | Item | Effect | Depends on |
 |---|---|---|---|
-| 8 | **#13 (engine trait)**: `kon-transcription` already has `LocalEngine` and a `SpeechBackend` enum over `transcribe-rs` adapter + `WhisperRsBackend`. This is a 90% version of Handy's `transcribe-rs` pattern. We lift it one more inch: replace the enum with a public `Transcriber` trait (`load`, `transcribe_sync`, `capabilities`) + blanket impls for the existing two backends, and gate `WhisperRsBackend` behind the `whisper` feature so non-Whisper builds compile without pulling `whisper-rs-sys` | — |
-| 9 | **#19**: progressive WAV write during live capture | Extend `commands/live.rs` to stream captured mono-16kHz samples directly into a `.wav` in the session folder via `kon_audio::WavWriter::append`. Replace the in-memory `kept_audio: Vec<f32>` when `save_audio` is on with a disk-backed writer; on crash, the partial file is a playable WAV. Commits the `commands/live.rs` frame-size bookkeeping untouched | #13 (uses `Transcriber::capabilities().sample_rate`) |
+| 8 | **#13 (engine trait)**: `magnotia-transcription` already has `LocalEngine` and a `SpeechBackend` enum over `transcribe-rs` adapter + `WhisperRsBackend`. This is a 90% version of Handy's `transcribe-rs` pattern. We lift it one more inch: replace the enum with a public `Transcriber` trait (`load`, `transcribe_sync`, `capabilities`) + blanket impls for the existing two backends, and gate `WhisperRsBackend` behind the `whisper` feature so non-Whisper builds compile without pulling `whisper-rs-sys` | — |
+| 9 | **#19**: progressive WAV write during live capture | Extend `commands/live.rs` to stream captured mono-16kHz samples directly into a `.wav` in the session folder via `magnotia_audio::WavWriter::append`. Replace the in-memory `kept_audio: Vec<f32>` when `save_audio` is on with a disk-backed writer; on crash, the partial file is a playable WAV. Commits the `commands/live.rs` frame-size bookkeeping untouched | #13 (uses `Transcriber::capabilities().sample_rate`) |
 
 **Commit boundary:** tests (`transcriber_trait_is_object_safe`,
 `wav_writer_survives_crash`), build, check. **Stop for review.**
@@ -105,7 +105,7 @@ repetition detector. **Stop for review.**
 | `commands::models::get_runtime_capabilities` | **Extend** | Add `active_compute_device`, `cpu_features`, `parallel_mode_available` fields |
 | `commands::live::evaluate_speech_gate` | **Replace** with VAD-gated chunker, keep RMS version as a cheap fallback when VAD ONNX model missing |
 | `commands::live::run_live_session` | **Extend** | Switch buffer ownership to `streaming::StreamingSession`, keep the `cpal` plumbing |
-| `crates/transcription/src/model_manager::download_file` | **Extend** | Harden to match `kon-llm`'s resume + sha behaviour, add `ResumeUnsupported` arm |
+| `crates/transcription/src/model_manager::download_file` | **Extend** | Harden to match `magnotia-llm`'s resume + sha behaviour, add `ResumeUnsupported` arm |
 | `crates/transcription/src/whisper_rs_backend::transcribe_sync` | **Extend** | Surface `no_speech_prob` + `avg_logprob` per segment |
 | `crates/transcription/src/local_engine::SpeechBackend` | **Replace** with public `Transcriber` trait |
 | `crates/transcription/src/concurrency` | **Extend** | Already a stub; add GPU guard wrapper |
@@ -225,7 +225,7 @@ behind `runtimeCapabilities.parallelModeAvailable`.
 ## Test strategy
 
 - Every phase ends green on `cargo test --workspace --lib && cargo
-  build -p kon && npm run check`.
+  build -p magnotia && npm run check`.
 - `phase4-systems-f7d0` never regresses the 116 existing lib tests. If
   a test starts failing and the cause is an A change, it's fixed
   in-phase, not deferred.
@@ -266,5 +266,5 @@ behind `runtimeCapabilities.parallelModeAvailable`.
 - One concern per commit. Subject line `feat(A.2):`, `fix(A.1):`, etc.,
   referencing the phase so the reviewer can group them.
 - Commit message body states which brief-item the commit closes.
-- `cargo test --workspace --lib && cargo build -p kon && npm run check`
+- `cargo test --workspace --lib && cargo build -p magnotia && npm run check`
   green before every commit, per the rules of engagement.