style: format seluruh workspace dengan cargo fmt

Menyeragamkan format kode sesuai rustfmt (126 file). Sebelumnya
lefthook pre-commit 'cargo fmt --check' akan gagal pada commit apa pun.

apps/application/src/cms/conversation_service.rs

@@ -58,11 +58,7 @@ impl<R: ConversationRepository> zesdex_domain::cms::ConversationService
         Ok(())
     }
 
-    fn add_message(
-        &self,
-        conv: &mut Conversation,
-        msg: ChatMessage,
-    ) -> Result<(), ServiceError> {
+    fn add_message(&self, conv: &mut Conversation, msg: ChatMessage) -> Result<(), ServiceError> {
         tracing::debug!("adding message to session {}", conv.session_id);
         conv.push(msg);
         let dir = self.session_dir(&conv.session_id);

apps/application/src/cms/settings_service.rs

@@ -14,8 +14,7 @@ use std::path::PathBuf;
 use tracing;
 
 use zesdex_domain::cms::{
-    AppConfig, AppConfigRepository, ProviderConfig, ServiceError, Settings,
-    SettingsRepository,
+    AppConfig, AppConfigRepository, ProviderConfig, ServiceError, Settings, SettingsRepository,
 };
 
 /// Service implementation for settings and app-config operations.
@@ -30,11 +29,7 @@ pub struct SettingsServiceImpl<S, C> {
 
 impl<S: SettingsRepository, C: AppConfigRepository> SettingsServiceImpl<S, C> {
     /// Create a new service with the given repositories and base directory.
-    pub fn new(
-        settings_repo: S,
-        app_config_repo: C,
-        base_dir: impl Into<PathBuf>,
-    ) -> Self {
+    pub fn new(settings_repo: S, app_config_repo: C, base_dir: impl Into<PathBuf>) -> Self {
         tracing::debug!("creating SettingsServiceImpl");
         Self {
             settings_repo,
@@ -44,8 +39,8 @@ impl<S: SettingsRepository, C: AppConfigRepository> SettingsServiceImpl<S, C> {
     }
 }
 
-impl<S: SettingsRepository, C: AppConfigRepository>
-    zesdex_domain::cms::SettingsService for SettingsServiceImpl<S, C>
+impl<S: SettingsRepository, C: AppConfigRepository> zesdex_domain::cms::SettingsService
+    for SettingsServiceImpl<S, C>
 {
     fn load_settings(&self) -> Result<Settings, ServiceError> {
         tracing::debug!("loading settings");
@@ -60,11 +55,7 @@ impl<S: SettingsRepository, C: AppConfigRepository>
         Ok(())
     }
 
-    fn update_provider(
-        &self,
-        name: &str,
-        config: &ProviderConfig,
-    ) -> Result<(), ServiceError> {
+    fn update_provider(&self, name: &str, config: &ProviderConfig) -> Result<(), ServiceError> {
         tracing::debug!("updating provider '{name}'");
         let mut app_config: AppConfig = self.app_config_repo.load(&self.base_dir)?;
         app_config