fix(tray): use actual window width for popup placement clamp (v6.4.7)

position_window_near_tray hardcoded win_w = 360 * target_scale, but the
window is 400 logical px wide (since v6.3.20 widened the popup). The
clamp was 40 logical px short, so on Windows at 1.25x scale the popup
leaked 50 physical px past the right edge of the active monitor —
visibly spanning into the next display.

Read win_w from window.outer_size() like win_h already does. With this
fix, future width changes in tauri.conf.json stay in sync with the
placement math automatically.

Co-Authored-By: Claude Opus 4 (1M context) <noreply@anthropic.com>

Author: synle

src-tauri/src/tray.rs

@@ -671,8 +671,12 @@ pub fn position_window_near_tray(
         tauri::Size::Logical(s) => (s.width * target_scale, s.height * target_scale),
     };
 
-    // Window size in target monitor's physical pixels
-    let win_w = 360.0 * target_scale;
+    // Window size in target monitor's physical pixels.
+    // Read actual width/height from outer_size (NOT hardcoded) so width changes
+    // in tauri.conf.json don't desync the placement clamp. outer_size returns
+    // physical pixels at the window's current scale, so divide by window_scale
+    // to get logical, then multiply by target_scale to get target-physical.
+    let win_w = window.outer_size()?.width as f64 * target_scale / window_scale;
     let win_h = window.outer_size()?.height as f64 * target_scale / window_scale;
     dbg(&format!(
         "tray x={} y={} w={} h={} | win_w={} win_h={}",

src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://raw.githubusercontent.com/nicoverbruggen/tauri-v2-docs/refs/heads/main/schemas/config.schema.json",
   "productName": "Display DJ",
-  "version": "6.4.6",
+  "version": "6.4.7",
   "identifier": "com.synle.display-dj",
   "build": {
     "beforeDevCommand": "npm run dev",