Add hot corners, media keys, orionshot, orionclip, notification history, autostart, GTK accent update, wallpaper slideshow, ISO build

- wm: hot corner polling via select()-based wm_run loop; TL=Exposé, TR=show desktop, BL=launcher, BR=lock
- wm: XF86 media key grabs (volume, brightness, playback) + Super+V for clipboard
- wm: autostart reads ~/.config/orionos/autostart on startup
- events: media key dispatch (amixer/brightnessctl/playerctl); Super+V → orionclip --show; Print → orionshot
- orionshot: new X11 screenshot tool, full-screen and rubber-band region modes, saves PNG to ~/Pictures/Screenshots/
- orionclip: new clipboard manager daemon; polls clipboard, stores 20 entries, popup via Super+V IPC
- orionnotify: append-only notification history log at ~/.local/share/orionos/notif-history.log
- themes: GTK accent updated from #3A6898 to #1E58A8 to match WM/deskbar
- themes: orionwallpaper gains --slideshow DIR [SECS] mode using feh + sleep loop
- iso: Docker-based archiso builder, live-session xinitrc, profiledef.sh
- Makefile: add orionshot and orionclip to all/clean/install; Docker-based iso target

Makefile

@@ -5,9 +5,9 @@
 #   make clean    — remove build artifacts
 #   make iso      — build the bootable ISO (requires Arch Linux + archiso)
 
-.PHONY: all wm deskbar launcher installer nebula orionpkg skykit rigel quill lens orionnotify orionlock clean install iso
+.PHONY: all wm deskbar launcher installer nebula orionpkg skykit rigel quill lens orionnotify orionlock orionshot orionclip clean install iso
 
-all: wm deskbar launcher installer nebula orionpkg skykit rigel quill lens orionnotify orionlock
+all: wm deskbar launcher installer nebula orionpkg skykit rigel quill lens orionnotify orionlock orionshot orionclip
 
 wm:
 	$(MAKE) -C wm
@@ -45,6 +45,12 @@ orionnotify:
 orionlock:
 	$(MAKE) -C orionlock
 
+orionshot:
+	$(MAKE) -C orionshot
+
+orionclip:
+	$(MAKE) -C orionclip
+
 clean:
 	$(MAKE) -C wm        clean
 	$(MAKE) -C deskbar   clean
@@ -58,6 +64,8 @@ clean:
 	$(MAKE) -C lens         clean
 	$(MAKE) -C orionnotify  clean
 	$(MAKE) -C orionlock    clean
+	$(MAKE) -C orionshot    clean
+	$(MAKE) -C orionclip    clean
 
 install: all
 	# binaries
@@ -72,6 +80,8 @@ install: all
 	install -Dm755 lens/lens               /usr/local/bin/lens
 	install -Dm755 orionnotify/orionnotify /usr/local/bin/orionnotify
 	install -Dm755 orionlock/orionlock     /usr/local/bin/orionlock
+	install -Dm755 orionshot/orionshot     /usr/local/bin/orionshot
+	install -Dm755 orionclip/orionclip     /usr/local/bin/orionclip
 	# GTK theme
 	mkdir -p /usr/share/themes
 	cp -r themes/OrionOS /usr/share/themes/
@@ -88,8 +98,11 @@ install: all
 	@echo "  picom --config /etc/orionos/picom.conf &"
 	@echo "  oriondeskbar &"
 	@echo "  orionnotify &"
+	@echo "  orionclip &"
 	@echo "  exec orionwm"
 
 iso:
-	chmod +x build-iso.sh
-	./build-iso.sh
+	@echo "Building OrionOS ISO via Docker..."
+	docker build -t orionos-iso-builder -f iso/docker/Dockerfile .
+	mkdir -p iso/output
+	docker run --rm --privileged -v "$(PWD)/iso/output:/output" orionos-iso-builder