chore: drop unlock diagnostic instrumentation (v0.6.16)

The per-unlock window-state dump was scaffolding to prove the stale-window
hypothesis behind v0.6.15. With the fix in place, normal logging covers
validation: the prune handler already logs on monitor removal, and
coredumpctl shows whether the crash recurs. Remove the diagnostic block
and its all_handles_dbg clone; restore all_handles to its original spot.

src/main.rs

@@ -72,39 +72,18 @@ fn activate_with_session_lock(
             .and_then(|path| lockscreen::load_background_texture(&path)),
     );
 
-    // Shared handles list — populated by connect_monitor, read by fingerprint init.
-    // Declared before unlock_callback so the callback can inspect window state on unlock.
-    let all_handles: Rc<RefCell<Vec<lockscreen::LockscreenHandles>>> =
-        Rc::new(RefCell::new(Vec::new()));
-
     // Shared unlock callback — unlocks session and quits.
     // Guard prevents double-unlock if PAM and fingerprint succeed simultaneously.
     let lock_clone = lock.clone();
     let app_clone = app.clone();
     let already_unlocked = Rc::new(Cell::new(false));
     let au = already_unlocked.clone();
-    let all_handles_dbg = all_handles.clone();
     let unlock_callback: Rc<dyn Fn()> = Rc::new(move || {
         if au.get() {
             log::debug!("Unlock already triggered, ignoring duplicate");
             return;
         }
         au.set(true);
-        // DIAGNOSTIC: log lock-window state at unlock to confirm whether a stale
-        // window (unrealized / dead surface) remains in all_handles after a monitor
-        // power-off/resume. Remove once the resume-unlock crash is fixed.
-        {
-            let handles = all_handles_dbg.borrow();
-            log::info!("UNLOCK: {} window(s) in all_handles", handles.len());
-            for (i, h) in handles.iter().enumerate() {
-                log::info!(
-                    "UNLOCK:   window[{i}] realized={} mapped={} visible={}",
-                    h.window.is_realized(),
-                    h.window.is_mapped(),
-                    h.window.is_visible(),
-                );
-            }
-        }
         lock_clone.unlock();
         app_clone.quit();
     });
@@ -116,6 +95,10 @@ fn activate_with_session_lock(
     // Shared config for use in the monitor signal handler
     let config = Rc::new(config.clone());
 
+    // Shared handles list — populated by connect_monitor, read by fingerprint init
+    let all_handles: Rc<RefCell<Vec<lockscreen::LockscreenHandles>>> =
+        Rc::new(RefCell::new(Vec::new()));
+
     // Shared fingerprint listener — None until async init completes.
     // The monitor handler checks this to wire up FP labels on hotplugged monitors.
     let shared_fp: Rc<RefCell<Option<Rc<RefCell<FingerprintListener>>>>> =