feat(claude): add Quick Toggles for common Claude Code preferences

Add checkbox toggles for hideAttribution, alwaysThinking, and
enableTeammates that write directly to the live settings file via
RFC 7396 JSON Merge Patch. Mirror changes to the form editor using
form.watch for reactive updates.

src-tauri/src/commands/provider.rs

@@ -167,6 +167,12 @@ pub fn read_live_provider_settings(app: String) -> Result<serde_json::Value, Str
     ProviderService::read_live_settings(app_type).map_err(|e| e.to_string())
 }
 
+#[tauri::command]
+pub fn patch_claude_live_settings(patch: serde_json::Value) -> Result<bool, String> {
+    ProviderService::patch_claude_live(patch).map_err(|e| e.to_string())?;
+    Ok(true)
+}
+
 #[tauri::command]
 pub async fn test_api_endpoints(
     urls: Vec<String>,

src-tauri/src/lib.rs

@@ -848,6 +848,7 @@ pub fn run() {
             commands::get_common_config_snippet,
             commands::set_common_config_snippet,
             commands::read_live_provider_settings,
+            commands::patch_claude_live_settings,
             commands::get_settings,
             commands::save_settings,
             commands::get_rectifier_config,

src-tauri/src/services/provider/live.rs

@@ -284,6 +284,46 @@ pub(crate) fn write_live_partial(app_type: &AppType, provider: &Provider) -> Res
     }
 }
 
+/// Apply a JSON merge patch (RFC 7396) directly to Claude live settings.json.
+/// Used for user-level preferences (attribution, thinking, etc.) that are
+/// independent of the active provider.
+pub fn patch_claude_live(patch: Value) -> Result<(), AppError> {
+    let path = get_claude_settings_path();
+    let mut live = if path.exists() {
+        read_json_file(&path).unwrap_or_else(|_| json!({}))
+    } else {
+        json!({})
+    };
+    json_merge_patch(&mut live, &patch);
+    let settings = sanitize_claude_settings_for_live(&live);
+    write_json_file(&path, &settings)?;
+    Ok(())
+}
+
+/// RFC 7396 JSON Merge Patch: null deletes, objects merge recursively, rest overwrites.
+fn json_merge_patch(target: &mut Value, patch: &Value) {
+    if let Some(patch_obj) = patch.as_object() {
+        if !target.is_object() {
+            *target = json!({});
+        }
+        let target_obj = target.as_object_mut().unwrap();
+        for (key, value) in patch_obj {
+            if value.is_null() {
+                target_obj.remove(key);
+            } else if value.is_object() {
+                let entry = target_obj.entry(key.clone()).or_insert(json!({}));
+                json_merge_patch(entry, value);
+                // Clean up empty container objects
+                if entry.as_object().map_or(false, |o| o.is_empty()) {
+                    target_obj.remove(key);
+                }
+            } else {
+                target_obj.insert(key.clone(), value.clone());
+            }
+        }
+    }
+}
+
 /// Claude: merge only key env and top-level fields into live settings.json
 fn write_claude_live_partial(provider: &Provider) -> Result<(), AppError> {
     let path = get_claude_settings_path();

src-tauri/src/services/provider/mod.rs

@@ -587,6 +587,11 @@ impl ProviderService {
         read_live_settings(app_type)
     }
 
+    /// Patch Claude live settings directly (user-level preferences)
+    pub fn patch_claude_live(patch: Value) -> Result<(), AppError> {
+        live::patch_claude_live(patch)
+    }
+
     /// Get custom endpoints list (re-export)
     pub fn get_custom_endpoints(
         state: &AppState,