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/core/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "magnotia-core"
+name = "lumotia-core"
 version = "0.1.0"
 edition = "2021"
 description = "Core types, constants, traits, hardware detection, and model registry for Magnotia"

crates/core/examples/tuning_log_demo.rs

@@ -9,11 +9,11 @@
 //! exactly one INFO line; subsequent calls with the same tuple are
 //! silenced by the per-process log-once cache.
 
-use magnotia_core::tuning::{inference_thread_count, Workload};
+use lumotia_core::tuning::{inference_thread_count, Workload};
 
 fn main() {
     tracing_subscriber::fmt()
-        .with_env_filter("magnotia_core=info")
+        .with_env_filter("lumotia_core=info")
         .with_target(true)
         .with_writer(std::io::stderr)
         .init();

crates/core/src/error.rs

@@ -34,7 +34,7 @@ pub enum MagnotiaError {
     #[error("file not found: '{}'", .0.display())]
     FileNotFound(PathBuf),
 
-    /// Structured storage failure flowed up from `magnotia_storage::Error` via
+    /// Structured storage failure flowed up from `lumotia_storage::Error` via
     /// its `From` impl. Display reads through to `detail` so the operation +
     /// source context produced by the storage crate isn't double-prefixed.
     #[error("{detail}")]
@@ -58,7 +58,7 @@ pub enum MagnotiaError {
 /// Coarse discriminator for `MagnotiaError::Storage`. The storage crate maps
 /// its full typed error onto one of these kinds at the boundary. Backend code
 /// that wants finer-grained branching pattern-matches on
-/// `magnotia_storage::Error` directly.
+/// `lumotia_storage::Error` directly.
 #[derive(Debug, Clone, Copy, Serialize)]
 #[serde(rename_all = "snake_case")]
 pub enum StorageKind {

crates/core/src/tuning.rs

@@ -89,7 +89,7 @@ pub fn inference_thread_count(workload: Workload, gpu_offloaded: bool) -> usize
     if let Ok(mut seen) = log_seen().lock() {
         if seen.insert(key) {
             tracing::info!(
-                target: "magnotia_core::tuning",
+                target: "lumotia_core::tuning",
                 threads = final_value,
                 workload = ?workload,
                 gpu_offloaded,