fix(acr-wedge): use AppleScript on macOS for keystroke injection

pyautogui's Quartz-based keystroke path often fails on newer macOS
because the Python CLI binary doesn't auto-surface in System Settings
> Accessibility. User reported the daemon detected taps fine but
keystrokes never landed in any window.

Switch to AppleScript / System Events on macOS. Permission attaches
to whatever terminal/app launched the Python process (Terminal.app,
iTerm, etc.) — a familiar named app the user can grant Accessibility
to in one click. Combined keystroke + Return in a single osascript
call to keep latency ~100ms per tap.

Fall back to pyautogui if osascript fails (handles edge cases) and
on non-macOS platforms.

tools/fusion_clock_acr_wedge/wedge.py

@@ -112,23 +112,62 @@ def read_uid(connection):
     return ":".join(f"{b:02X}" for b in data)
 
 
+def _emit_macos(uid):
+    """Type via AppleScript / System Events.
+
+    Permission attaches to the terminal/app that launched this Python
+    process — typically Terminal.app, iTerm, or another known GUI app
+    that the user can easily find in Accessibility settings. More
+    reliable than pyautogui's Quartz path which often fails to surface
+    Python in the Accessibility list on newer macOS.
+    """
+    import subprocess
+    script = (
+        'tell application "System Events"\n'
+        f'  keystroke "{uid}"\n'
+        '  key code 36\n'  # Return
+        'end tell'
+    )
+    result = subprocess.run(
+        ["osascript", "-e", script],
+        capture_output=True, text=True, check=False, timeout=3,
+    )
+    if result.returncode != 0:
+        raise RuntimeError(f"osascript failed: {result.stderr.strip()}")
+
+
+def _emit_other(uid):
+    """Type via pyautogui (works on Linux, Windows, and as macOS fallback)."""
+    import pyautogui
+    pyautogui.typewrite(uid, interval=0.005)
+    pyautogui.press("enter")
+
+
 def emit_uid(uid, type_keys=True, verbose=False):
-    """Type UID + Enter into the focused window via pyautogui."""
+    """Type UID + Enter into the focused window."""
     if verbose:
         print(f"[wedge] TAP {uid}")
     if not type_keys:
         return
+
+    if sys.platform == "darwin":
         try:
-        import pyautogui
+            _emit_macos(uid)
+            return
+        except Exception as e:
+            if verbose:
+                print(f"[wedge] osascript path failed ({e}); falling back to pyautogui")
+
+    try:
+        _emit_other(uid)
     except ImportError:
         print(
             "[wedge] pyautogui is not installed; cannot type. "
             "Run: pip3 install pyautogui  (or use --no-type for detect-only)",
             file=sys.stderr,
         )
-        return
-    pyautogui.typewrite(uid, interval=0.005)
-    pyautogui.press("enter")
+    except Exception as e:
+        print(f"[wedge] type error: {e}", file=sys.stderr)
 
 
 def run_loop(args):