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/orchestrator.rs

@@ -18,12 +18,12 @@
 use std::sync::Arc;
 
 use async_trait::async_trait;
-use magnotia_cloud_providers::{
+use lumotia_cloud_providers::{
     CostClass, EngineProfile, ProviderCapabilities, ProviderId, ProviderKind, ProviderTranscript,
     TranscriptionProvider,
 };
-use magnotia_core::error::{MagnotiaError, Result};
-use magnotia_core::types::{AudioSamples, TranscriptionOptions};
+use lumotia_core::error::{MagnotiaError, Result};
+use lumotia_core::types::{AudioSamples, TranscriptionOptions};
 
 use crate::local_engine::LocalEngine;
 use crate::registry::EngineRegistry;
@@ -68,7 +68,7 @@ impl TranscriptionProvider for LocalProviderAdapter {
         ProviderCapabilities {
             sample_rate: local
                 .map(|c| c.sample_rate)
-                .unwrap_or(magnotia_core::constants::WHISPER_SAMPLE_RATE),
+                .unwrap_or(lumotia_core::constants::WHISPER_SAMPLE_RATE),
             channels: local.map(|c| c.channels).unwrap_or(1),
             initial_prompt_supported: local.map(|c| c.supports_initial_prompt).unwrap_or(false),
             language_hint_supported: true,
@@ -153,7 +153,7 @@ mod tests {
 
     use std::sync::atomic::{AtomicUsize, Ordering};
 
-    use magnotia_core::types::{Segment, Transcript};
+    use lumotia_core::types::{Segment, Transcript};
 
     /// Mock provider that returns a canned transcript and counts
     /// invocations. Used to validate the orchestrator's dispatch logic