Fix mpv tile overlap portably; add make install/deploy

mpv 0.35 rejects --auto-window-resize, which crash-looped every player.
Drop that flag and re-assert each tile geometry on a 1s timer in the
daemon, overriding mpv auto-resize on any mpv version.

Add make install (auto-sudo, native build + copy to /usr/local/bin)
and make deploy (install + restart the kiosk getty unit).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Makefile

@@ -3,11 +3,22 @@ PKG := ./cmd/rtsp-streamer
 BINDIR := bin
 LDFLAGS := -s -w
 
-.PHONY: all build pi pi32 test vet clean run-tui
+# Install location. Override with `make install PREFIX=/opt`.
+PREFIX ?= /usr/local
+DESTBIN := $(PREFIX)/bin/$(BINARY)
+
+# Use sudo automatically when not already root, so `make install` /
+# `make deploy` work whether or not you prefix them with sudo.
+SUDO := $(shell [ "$$(id -u)" -eq 0 ] || echo sudo)
+
+# The kiosk session unit restarted by `make deploy`.
+KIOSK_UNIT ?= getty@tty1
+
+.PHONY: all build pi pi32 test vet clean run-tui install deploy uninstall
 
 all: build
 
-## build: compile for the host platform
+## build: compile for the host platform (native arch)
 build:
 	go build -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(BINARY) $(PKG)
 
@@ -19,6 +30,22 @@ pi:
 pi32:
 	GOOS=linux GOARCH=arm GOARM=7 go build -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(BINARY)-armv7 $(PKG)
 
+## install: build for this machine and copy the binary to $(PREFIX)/bin
+## (auto-sudo). This is the location the running daemon uses.
+install: build
+	$(SUDO) install -m 0755 $(BINDIR)/$(BINARY) $(DESTBIN)
+	@echo "installed -> $(DESTBIN)"
+
+## deploy: install, then restart the kiosk session so the wall picks it up
+deploy: install
+	$(SUDO) systemctl restart $(KIOSK_UNIT)
+	@echo "restarted $(KIOSK_UNIT); run 'rtsp-streamer status' to check"
+
+## uninstall: remove the installed binary
+uninstall:
+	$(SUDO) rm -f $(DESTBIN)
+	@echo "removed $(DESTBIN)"
+
 ## test: run unit tests
 test:
 	go test ./...

internal/daemon/daemon.go

@@ -153,27 +153,35 @@ func (d *Daemon) applyLayout(ctx context.Context, name string) error {
 	return nil
 }
 
-// placeWhenReady waits for the mpv window to map then tiles it, retrying while
-// the layout is active (Supervise may relaunch mpv with a new pid).
+// placeWhenReady waits for the mpv window to map, tiles it, then keeps
+// re-asserting its geometry on a timer. The re-assertion matters because mpv
+// resizes its own window to the camera's native resolution when the stream
+// loads (and mpv 0.35 has no flag to disable that); re-issuing the sway
+// resize snaps the window back into its cell, portably across mpv versions.
 func (d *Daemon) placeWhenReady(ctx context.Context, p *player.Player, rect compositor.Rect) {
-	var lastPID int
-	ticker := time.NewTicker(500 * time.Millisecond)
+	var readyPID int
+	ticker := time.NewTicker(1 * time.Second)
 	defer ticker.Stop()
 	for {
 		if ctx.Err() != nil {
 			return
 		}
 		pid := p.PID()
-		if pid != 0 && pid != lastPID {
-			if err := d.comp.WaitForWindow(ctx, pid, 15*time.Second); err == nil {
-				if err := d.comp.Place(ctx, pid, rect); err != nil {
-					d.log.Warn("place failed", "slot", p.Slot, "err", err)
-				} else {
-					lastPID = pid
-					d.log.Debug("window placed", "slot", p.Slot, "pid", pid, "rect", rect)
+		if pid != 0 {
+			// New process: wait for its window to map before positioning.
+			if pid != readyPID {
+				if err := d.comp.WaitForWindow(ctx, pid, 15*time.Second); err != nil {
+					goto wait
 				}
+				readyPID = pid
+				d.log.Debug("window mapped", "slot", p.Slot, "pid", pid, "rect", rect)
+			}
+			// Re-assert geometry every tick to override mpv's auto-resize.
+			if err := d.comp.Place(ctx, pid, rect); err != nil {
+				d.log.Debug("place failed", "slot", p.Slot, "err", err)
 			}
 		}
+	wait:
 		select {
 		case <-ctx.Done():
 			return

internal/player/player.go

@@ -67,12 +67,10 @@ func (p *Player) args() []string {
 		"--cursor-autohide=always",
 		"--no-border",
 		"--fullscreen=no", // we tile via the compositor, not fullscreen
-		// Never let mpv resize its own window to the camera's native
-		// resolution — the compositor owns tile geometry. Without this a
-		// high-res camera grows its window and overlaps its neighbours.
-		"--auto-window-resize=no",
-		// Scale video to fill the tile (letterboxed to preserve aspect); the
-		// window size is fixed by the compositor, not by the video.
+		// Keep aspect (letterbox) inside the tile; the compositor owns the
+		// window size, not the video. mpv still resizes its window to the
+		// video resolution on load (and mpv 0.35 lacks the flag to disable
+		// that), so the daemon re-asserts each tile's geometry on a timer.
 		"--keepaspect=yes",
 		"--title=" + p.Title(),
 		"--input-ipc-server=" + p.ipcPath,