fix: remove dead SetFocusedApp D-Bus call

The daemon stored the focused app ID but never read it. App exclusion
runs entirely in the extension before SubmitItem is called, so the
D-Bus round-trip on every window focus change was pure overhead.

Removed from: extension.js call site, dbus.js XML interface,
dbus_service.rs method + struct field, main.rs Arc allocation.
Focus tracking in _connectFocusTracking is kept since _currentFocusedApp
is still used for the JS-side exclusion check.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

strata-daemon/src/dbus_service.rs

@@ -53,7 +53,6 @@ pub struct SubmitRequest {
 pub struct StrataManager {
     pub db: Arc<Db>,
     pub limits: Limits,
-    pub focused_app: Arc<tokio::sync::Mutex<String>>,
     pub submit_tx: tokio::sync::mpsc::UnboundedSender<SubmitRequest>,
     /// Send a `()` here to trigger graceful shutdown from the D-Bus Shutdown method.
     pub shutdown_tx: tokio::sync::mpsc::UnboundedSender<()>,
@@ -197,13 +196,6 @@ impl StrataManager {
             .map_err(|e| zbus::fdo::Error::Failed(e.to_string()))
     }
 
-    /// Called by the GJS extension on every focused-window change.
-    /// Used for app exclusion: if the focused app is in the exclusion list,
-    /// the extension will immediately DeleteItem any new item from that app.
-    async fn set_focused_app(&self, app_id: String) {
-        *self.focused_app.lock().await = app_id;
-    }
-
     /// Push runtime limits from the front-end. Takes effect immediately.
     /// All three values are absolute (max_text and max_image are bytes,
     /// not MB). 0 means "leave unchanged" for that field.

strata-daemon/src/main.rs

@@ -7,7 +7,7 @@ use std::sync::Arc;
 
 use anyhow::{Context, Result};
 use dbus_service::{Limits, StrataManager, SubmitRequest, THUMB_PX};
-use tokio::sync::{mpsc, Mutex};
+use tokio::sync::mpsc;
 use tracing_subscriber::EnvFilter;
 use wl_clipboard_rs::paste::{get_contents, ClipboardType, MimeType, Seat};
 
@@ -23,7 +23,6 @@ async fn main() -> Result<()> {
 
     let cfg = config::Config::new();
     let db = Arc::new(db::Db::open(&cfg.db_path).context("Opening database")?);
-    let focused_app = Arc::new(Mutex::new(String::new()));
     let limits = Limits::with_defaults();
     limits
         .max_history
@@ -45,7 +44,6 @@ async fn main() -> Result<()> {
     let manager = StrataManager {
         db: db.clone(),
         limits: limits.clone(),
-        focused_app: focused_app.clone(),
         submit_tx,
         shutdown_tx,
     };

strata@edu4rdshl.dev/dbus.js

@@ -45,10 +45,6 @@ const STRATA_IFACE_XML = `
 
     <method name="ClearHistory"/>
 
-    <method name="SetFocusedApp">
-      <arg type="s" direction="in" name="app_id"/>
-    </method>
-
     <method name="Shutdown"/>
 
     <method name="SetConfig">

strata@edu4rdshl.dev/extension.js

@@ -554,8 +554,6 @@ export default class StrataExtension extends Extension {
         this._focusSignalId = global.display.connect('notify::focus-window', () => {
             const win = global.display.focus_window;
             this._currentFocusedApp = (win?.get_wm_class() ?? '').toLowerCase();
-            // Inform the daemon (best-effort, ignore failures).
-            this._proxy?.SetFocusedAppRemote(this._currentFocusedApp, () => {});
         });
     }