Fix Windows player: kiosk lockdown, robust video transitions, keep-awake

- Production/kiosk mode: exit_on_escape=0, window-close guard, Ctrl+C
  ignore, Alt+F4/Alt+Tab/Win/Ctrl+Esc keyboard hook (Windows)
- Robust video playback: async (non-blocking) ffpyplayer teardown,
  video progress watchdog (advance at true clip end), EOS re-entrancy
  guard, stale-advance guard, focus keeper for foreground retention
- Resume playback timer after Settings/exit popups close
- Windows keep-awake: SetThreadExecutionState + disable screensaver/
  lock screen (restored on exit)
- Always-on playback_trace.log for diagnosing transitions
- exe metadata: app_icon.ico + version_info.txt (publisher identity)

windows/version_info.txt

@@ -0,0 +1,43 @@
+# UTF-8
+#
+# Windows version resource for KiwySignagePlayer.exe
+# This file is used by PyInstaller (version=) to embed publisher/product
+# metadata into the executable so Windows Smart App Control / SmartScreen
+# can identify the app instead of flagging it as "Unknown publisher".
+#
+# Note: A code-signing certificate is still required for a fully trusted
+# publisher name; this metadata at least names the product/company and
+# supplies a version number.
+#
+VSVersionInfo(
+  ffi=FixedFileInfo(
+    filevers=(1, 2, 0, 0),
+    prodvers=(1, 2, 0, 0),
+    mask=0x3f,
+    flags=0x0,
+    OS=0x40004,
+    fileType=0x1,
+    subtype=0x0,
+    date=(0, 0)
+  ),
+  kids=[
+    StringFileInfo(
+      [
+        StringTable(
+          '040904B0',
+          [
+            StringStruct('CompanyName', 'Kiwy Signage'),
+            StringStruct('FileDescription', 'Kiwy Signage Player - Digital Signage Player'),
+            StringStruct('FileVersion', '1.2.0.0'),
+            StringStruct('InternalName', 'KiwySignagePlayer'),
+            StringStruct('LegalCopyright', 'Copyright (c) 2026 Kiwy Signage'),
+            StringStruct('OriginalFilename', 'KiwySignagePlayer.exe'),
+            StringStruct('ProductName', 'Kiwy Signage Player'),
+            StringStruct('ProductVersion', '1.2.0.0'),
+          ]
+        )
+      ]
+    ),
+    VarFileInfo([VarStruct('Translation', [1033, 1200])])
+  ]
+)