Update documentation and code strings to reflect production release phase

AGENTS.md

@@ -88,7 +88,7 @@ Avoid broad file operations that traverse these directories. Use ignore patterns
 - Keep changes scoped to the request. Do not refactor large files such as `src/App.jsx`, `src/styles.css`, `backend/main.py`, or `backend/local_rag.py` unless the task needs it.
 - Prefer existing helper modules and patterns over new abstractions.
 - Preserve stable backend contracts and persisted data compatibility. Add small migration helpers when changing database-backed fields.
-- Keep settings keys backward compatible where possible. Existing settings migrations live in Electron and backend settings helpers.
+- Keep settings keys backward compatible where possible. Existing settings migrations live in Tauri and backend settings helpers.
 - Use structured JSON/schema changes rather than ad hoc string parsing for API payloads.
 - Add comments only where they explain non-obvious control flow, concurrency, migration, or integration behavior.
 - Do not silently swallow errors in user-facing flows; surface useful messages while preserving graceful degradation for optional services.

src-tauri/src/main.rs

@@ -417,12 +417,12 @@ fn update_settings(settings: SettingsMap, store: State<'_, SettingsStore>) -> Re
 
 #[tauri::command]
 fn get_update_status() -> Value {
-    unavailable_update_status("Tauri update checks are not implemented in this migration phase.")
+    unavailable_update_status("Tauri update checks are not implemented in this production release phase.")
 }
 
 #[tauri::command]
 fn check_for_updates() -> Value {
-    unavailable_update_status("Tauri update checks are not implemented in this migration phase.")
+    unavailable_update_status("Tauri update checks are not implemented in this production release phase.")
 }
 
 #[tauri::command]
@@ -559,5 +559,5 @@ fn main() {
             open_external_link
         ])
         .run(tauri::generate_context!())
-        .expect("failed to run Heimgeist Tauri migration spike");
+        .expect("failed to run Heimgeist Tauri desktop shell");
 }