feat(wallpaper): sync selected wallpaper to hyprlock per monitor

wallpaper-picker now calls write_hyprlock_state() on apply, writing
per-monitor background blocks to ~/.config/hypr/hyprlock-backgrounds.conf.
hyprlock.conf sources that file instead of a hardcoded background block,
with a committed default for first-boot.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

desktopenvs/hyprland/hypr/hyprlock-backgrounds.conf

@@ -0,0 +1,12 @@
+# default — overwritten by ~/.config/scripts/wallpaper-picker
+background {
+    monitor =
+    path = ~/Pictures/background.jpg
+    blur_size = 6
+    blur_passes = 2
+    noise = 0.015
+    contrast = 1.25
+    brightness = 0.85
+    vibrancy = 0.2
+    vibrancy_darkness = 0.1
+}

desktopenvs/hyprland/hypr/hyprlock.conf

@@ -12,17 +12,8 @@ auth {
     fingerprint:enabled = true
 }
 
-background {
+# per-monitor backgrounds written by ~/.config/scripts/wallpaper-picker
-    monitor =
+source = ~/.config/hypr/hyprlock-backgrounds.conf
-    path = ~/Pictures/background.jpg
-    blur_size = 6
-    blur_passes = 2
-    noise = 0.015
-    contrast = 1.25
-    brightness = 0.85
-    vibrancy = 0.2
-    vibrancy_darkness = 0.1
-}
 
 input-field {
     monitor =

desktopenvs/hyprland/scripts/wallpaper-picker

@@ -7,6 +7,7 @@ set -u
 VERBOSE=0
 DIR=""
 STATE_FILE="${HOME}/.config/wallpaper.conf"
+HYPRLOCK_BG_FILE="${HOME}/.config/hypr/hyprlock-backgrounds.conf"
 FIT_MODE="cover"
 
 while [[ $# -gt 0 ]]; do
@@ -14,6 +15,7 @@ while [[ $# -gt 0 ]]; do
         -v|--verbose) VERBOSE=1 ;;
         --fit) shift; FIT_MODE="$1" ;;
         --state) shift; STATE_FILE="$1" ;;
+        --hyprlock-bg) shift; HYPRLOCK_BG_FILE="$1" ;;
         *) DIR="$1" ;;
     esac
     shift
@@ -178,6 +180,21 @@ write_state() {
     vlog "wrote $STATE_FILE"
 }
 
+write_hyprlock_state() {
+    local mon path tmp
+    tmp=$(mktemp "${HYPRLOCK_BG_FILE}.XXXXXX") || return 1
+    {
+        printf '# generated by wallpaper-picker — do not edit by hand\n'
+        for mon in "${MONITORS[@]}"; do
+            path="${CURRENT[$mon]:-}"
+            [[ -z "$path" ]] && continue
+            printf 'background {\n    monitor = %s\n    path = %s\n    blur_size = 6\n    blur_passes = 2\n    noise = 0.015\n    contrast = 1.25\n    brightness = 0.85\n    vibrancy = 0.2\n    vibrancy_darkness = 0.1\n}\n' \
+                "$mon" "$path"
+        done
+    } > "$tmp" && mv -f "$tmp" "$HYPRLOCK_BG_FILE"
+    vlog "wrote $HYPRLOCK_BG_FILE"
+}
+
 apply() {
     local path="$1"
     local out rc
@@ -216,6 +233,7 @@ apply() {
     done
 
     write_state
+    write_hyprlock_state
     return 0
 }
 

desktopenvs/hyprlua/hypr/hyprlock-backgrounds.conf

@@ -0,0 +1,12 @@
+# default — overwritten by ~/.config/scripts/wallpaper-picker
+background {
+    monitor =
+    path = ~/Pictures/background.jpg
+    blur_size = 6
+    blur_passes = 2
+    noise = 0.015
+    contrast = 1.25
+    brightness = 0.85
+    vibrancy = 0.2
+    vibrancy_darkness = 0.1
+}

desktopenvs/hyprlua/hypr/hyprlock.conf

@@ -12,17 +12,8 @@ auth {
     fingerprint:enabled = true
 }
 
-background {
+# per-monitor backgrounds written by ~/.config/scripts/wallpaper-picker
-    monitor =
+source = ~/.config/hypr/hyprlock-backgrounds.conf
-    path = ~/Pictures/background.jpg
-    blur_size = 6
-    blur_passes = 2
-    noise = 0.015
-    contrast = 1.25
-    brightness = 0.85
-    vibrancy = 0.2
-    vibrancy_darkness = 0.1
-}
 
 input-field {
     monitor =

desktopenvs/hyprlua/scripts/wallpaper-picker

@@ -7,6 +7,7 @@ set -u
 VERBOSE=0
 DIR=""
 STATE_FILE="${HOME}/.config/wallpaper.conf"
+HYPRLOCK_BG_FILE="${HOME}/.config/hypr/hyprlock-backgrounds.conf"
 FIT_MODE="cover"
 
 while [[ $# -gt 0 ]]; do
@@ -14,6 +15,7 @@ while [[ $# -gt 0 ]]; do
         -v|--verbose) VERBOSE=1 ;;
         --fit) shift; FIT_MODE="$1" ;;
         --state) shift; STATE_FILE="$1" ;;
+        --hyprlock-bg) shift; HYPRLOCK_BG_FILE="$1" ;;
         *) DIR="$1" ;;
     esac
     shift
@@ -178,6 +180,21 @@ write_state() {
     vlog "wrote $STATE_FILE"
 }
 
+write_hyprlock_state() {
+    local mon path tmp
+    tmp=$(mktemp "${HYPRLOCK_BG_FILE}.XXXXXX") || return 1
+    {
+        printf '# generated by wallpaper-picker — do not edit by hand\n'
+        for mon in "${MONITORS[@]}"; do
+            path="${CURRENT[$mon]:-}"
+            [[ -z "$path" ]] && continue
+            printf 'background {\n    monitor = %s\n    path = %s\n    blur_size = 6\n    blur_passes = 2\n    noise = 0.015\n    contrast = 1.25\n    brightness = 0.85\n    vibrancy = 0.2\n    vibrancy_darkness = 0.1\n}\n' \
+                "$mon" "$path"
+        done
+    } > "$tmp" && mv -f "$tmp" "$HYPRLOCK_BG_FILE"
+    vlog "wrote $HYPRLOCK_BG_FILE"
+}
+
 apply() {
     local path="$1"
     local out rc
@@ -216,6 +233,7 @@ apply() {
     done
 
     write_state
+    write_hyprlock_state
     return 0
 }