fix(browser): preserve initial address bar drag selection

src/renderer/src/components/browser-pane/assemble-chrome/BrowserAddressBar.tsx

@@ -53,6 +53,7 @@ export default function BrowserAddressBar({
   const browserDefaultSearchEngine = useAppStore((s) => s.browserDefaultSearchEngine)
   const browserKagiSessionLink = useAppStore((s) => s.browserKagiSessionLink)
   const closingRef = useRef(false)
+  const initialMouseDownRef = useRef(false)
   const openedAtRef = useRef(0)
   const blurCloseTimerRef = useRef<number | null>(null)
   const closingResetTimerRef = useRef<number | null>(null)
@@ -241,12 +242,15 @@ export default function BrowserAddressBar({
       window.clearTimeout(blurCloseTimerRef.current)
       blurCloseTimerRef.current = null
     }
-    inputRef.current?.select()
+    if (!initialMouseDownRef.current) {
+      inputRef.current?.select()
+    }
     openedAtRef.current = Date.now()
     setOpen(true)
   }, [inputRef])
 
   const handleBlur = useCallback(() => {
+    initialMouseDownRef.current = false
     // Why: delay close so that clicking a suggestion item registers before
     // the popover unmounts. Without this, onSelect never fires because the
     // mousedown on PopoverContent triggers input blur first.
@@ -425,11 +429,16 @@ export default function BrowserAddressBar({
               value={value}
               onFocus={handleFocus}
               onMouseDown={(event) => {
-                if (event.button === 0 && document.activeElement !== event.currentTarget) {
-                  // Keep the initial click from overriding the focus handler's full selection.
-                  event.preventDefault()
-                  event.currentTarget.focus()
+                initialMouseDownRef.current =
+                  event.button === 0 && document.activeElement !== event.currentTarget
+              }}
+              onClick={(event) => {
+                const input = event.currentTarget
+                // Preserve native drag selection; only expand a collapsed initial click.
+                if (initialMouseDownRef.current && input.selectionStart === input.selectionEnd) {
+                  input.select()
                 }
+                initialMouseDownRef.current = false
               }}
               onBlur={handleBlur}
               onKeyDown={handleKeyDown}