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/mcp/src/main.rs

@@ -1,12 +1,12 @@
 //! Stdio entry point for magnotia-mcp. Reads newline-delimited JSON-RPC messages
-//! from stdin, dispatches via `magnotia_mcp::handle_message`, writes responses to
+//! from stdin, dispatches via `lumotia_mcp::handle_message`, writes responses to
 //! stdout. Logs land on stderr so they don't collide with the JSON-RPC stream.
 
 use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
 
 #[tokio::main(flavor = "current_thread")]
 async fn main() -> anyhow::Result<()> {
-    let db_path = magnotia_storage::database_path();
+    let db_path = lumotia_storage::database_path();
     eprintln!(
         "[magnotia-mcp] opening Magnotia database at {} (read-only)",
         db_path.display()
@@ -15,7 +15,7 @@ async fn main() -> anyhow::Result<()> {
     // to the user's database, regardless of which tools the dispatcher
     // exposes. Migrations are deliberately skipped — this binary never owns
     // the schema; the main app is the single migration writer.
-    let pool = magnotia_storage::init_readonly(&db_path).await?;
+    let pool = lumotia_storage::init_readonly(&db_path).await?;
     eprintln!("[magnotia-mcp] ready, waiting for JSON-RPC on stdin");
 
     let mut lines = BufReader::new(tokio::io::stdin()).lines();
@@ -28,7 +28,7 @@ async fn main() -> anyhow::Result<()> {
         }
 
         let response = match serde_json::from_str::<serde_json::Value>(trimmed) {
-            Ok(raw) => match magnotia_mcp::handle_message(&pool, raw).await {
+            Ok(raw) => match lumotia_mcp::handle_message(&pool, raw).await {
                 Some(response) => response,
                 None => continue, // notification — no reply
             },
@@ -39,7 +39,7 @@ async fn main() -> anyhow::Result<()> {
                 // clients saw silence instead of a structured error
                 // (2026-04-22 review MAJOR).
                 eprintln!("[magnotia-mcp] parse error: {err}");
-                magnotia_mcp::parse_error_response(&err.to_string())
+                lumotia_mcp::parse_error_response(&err.to_string())
             }
         };