agent: lumotia-rebrand — rust workspace crates magnotia-* -> lumotia-*

Phase 2 of the rebrand cascade. Renames all 9 workspace crates from
magnotia-* to lumotia-* plus the src-tauri binary crate name:

- magnotia-ai-formatting   -> lumotia-ai-formatting
- magnotia-audio           -> lumotia-audio
- magnotia-cloud-providers -> lumotia-cloud-providers
- magnotia-core            -> lumotia-core
- magnotia-hotkey          -> lumotia-hotkey
- magnotia-llm             -> lumotia-llm
- magnotia-mcp             -> lumotia-mcp
- magnotia-storage         -> lumotia-storage
- magnotia-transcription   -> lumotia-transcription
- magnotia                 -> lumotia (src-tauri binary)
- magnotia_lib             -> lumotia_lib (src-tauri lib target)

Crate directories (crates/audio/ etc.) stay as-is; only the Cargo.toml
[package] name field changes plus all consumer module imports
(magnotia_core -> lumotia_core, etc.).

Remaining magnotia_* references at this point are intentional and
scoped to later phases: tracing targets (Phase 4), DB setting keys
magnotia_preferences/magnotia_history (Phase 5).

cargo build --workspace passes. cargo test --workspace: 330 pass, 0 fail.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/transcription/src/lib.rs

@@ -23,11 +23,11 @@ pub use transcribe_rs::SpeechModel;
 pub use transcriber::{Transcriber, TranscriberCapabilities};
 
 // Re-export the trait surface so downstream crates depend only on
-// `magnotia_transcription` to access both local engines and the
-// provider trait without a separate `magnotia_cloud_providers`
+// `lumotia_transcription` to access both local engines and the
+// provider trait without a separate `lumotia_cloud_providers`
 // dependency. This is the seam an OEM licensee uses when they swap
 // providers.
-pub use magnotia_cloud_providers::{
+pub use lumotia_cloud_providers::{
     CostClass, EngineProfile, NetworkRequirement, ProviderCapabilities, ProviderId, ProviderKind,
     ProviderTranscript, TranscriptionProvider,
 };