sway/waybar: fix muted glyph, dedupe bar on reload, relocate clock, match lock wallpaper

- Switch muted glyph from U+F6A9 to U+F026 (volume-off), which is
  present in every Nerd Font variant including LiterationMono.
- Use exec for waybar instead of exec_always, so reloading sway no
  longer spawns a second bar.
- Move the clock to the right of the tray and drop the leading
  calendar glyph from its format.
- Lock screen now uses maxresdefault.jpg, matching the i3 lockscreen;
  the asset is copied into sway/wallpapers/ so the sway profile stays
  self-contained.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dotfiles/desktop/.config/sway/config

@@ -74,7 +74,7 @@ exec pipewire-pulse
 exec wireplumber
 
 # Status bar
-exec_always waybar
+exec waybar
 
 # OSD daemon (volume/brightness/caps-lock)
 exec swayosd-server

dotfiles/desktop/.config/sway/scripts/lockscreen

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 exec swaylock \
-    --image "$HOME/.config/sway/wallpapers/wallpaper-161664.jpg" \
+    --image "$HOME/.config/sway/wallpapers/maxresdefault.jpg" \
     --scaling fill \
     --indicator-idle-visible \
     --ring-color 2f4058 \

dotfiles/desktop/.config/waybar/config.jsonc

@@ -5,8 +5,8 @@
   "spacing": 4,
 
   "modules-left":   ["sway/workspaces"],
-  "modules-center": ["clock"],
-  "modules-right":  ["cpu", "memory", "disk", "temperature", "backlight", "network", "pulseaudio", "battery", "tray"],
+  "modules-center": [],
+  "modules-right":  ["cpu", "memory", "disk", "temperature", "backlight", "network", "pulseaudio", "battery", "tray", "clock"],
 
   "sway/workspaces": {
     "disable-scroll": true,
@@ -31,7 +31,7 @@
 
   "clock": {
     "interval": 60,
-    "format": " {:%Y-%m-%d %H:%M}",
+    "format": "{:%Y-%m-%d %H:%M}",
     "tooltip-format": "<tt>{calendar}</tt>"
   },
 
@@ -74,7 +74,7 @@
 
   "pulseaudio": {
     "format":           "{icon} {volume}%",
-    "format-muted":     " muted",
+    "format-muted":     " muted",
     "format-bluetooth": "{icon} {volume}% ",
     "format-icons":     { "default": ["", "", ""] },
     "on-click":         "swayosd-client --output-volume mute-toggle",