unify color palette, harden shikane service, misc sway/opencode updates

sway:
- config: re-apply shikane profile after every reload
  (exec_always shikanectl reload); restart waybar on reload
  (exec_always pkill+waybar); enable default_border pixel 2;
  add tlpctl power-saver at startup
- keybinds: disable floating_modifier (was "$mod normal") -
  experiment for windows popping out via accidental mod+click
- windows: case-insensitive pydm title match for floating rule
- swayfx + waybar style: unified 5-color palette (base00-0F) with
  doc headers; waybar theme restyled to match the sway palette
- waybar config: scratchpad module in left bar, "S{count}" format
- new quickshell shell.qml bar

systemd user units:
- shikane.service: bind to graphical-session/sway-session targets,
  Type=simple, Restart=on-failure (2s) with start limits so crashes
  recover without giving up permanently
- new sway-session.target and its wants/ symlinks

opencode:
- load AGENTS.md as instructions (new file)
- move OpenWebUI API key from hardcoded to {env:OPENWEBUI_API_KEY}

.config/sway/config.d/keybinds

@@ -13,7 +13,9 @@ bindsym $mod+d exec $menu
 # Despite the name, also works for non-floating windows.
 # Change normal to inverse to use left mouse button for resizing and right
 # mouse button for dragging.
-floating_modifier $mod normal
+# DISABLED 2026-09-28: experiment for windows popping out (accidental mod+click)
+#floating_modifier $mod normal
+floating_modifier none
 
 # Reload the configuration file
 bindsym $mod+Shift+c reload

.config/sway/config.d/swayfx

@@ -1,34 +1,45 @@
 #smart_corner_radius on
-gaps inner 2
 
+# ╔══════════════════════════════════════════════════════════════════╗
+# ║ COLOR PALETTE                                                    ║
+# ║ To change colors:                                                ║
+# ║ 1. Edit the $base00–$base0F values below                        ║
+# ║ 2. Mirror those hex values in ~/.config/sway/waybar/style.css   ║
+# ║    (search for @define-color and replace the hex codes)          ║
+# ║ 3. Run: swaymsg reload                                          ║
+# ╚══════════════════════════════════════════════════════════════════╝
+
+gaps inner 2
 default_border pixel 2
 
-#corner_radius 8
-#blur enable
-#blur_passes 2
-#blur_radius 2
-#layer_effects "waybar" "blur enable"; shadows enable
-#shadows on
-#shadow_blur_radius 5
+# ╔══════════════════════════════════════════════════════════════════╗
+# ║ COLOR PALETTE (your 5 colors + black)                            ║
+# ║                                                                  ║
+# ║ To change colors:                                                ║
+# ║ 1. Edit the $base00–$base0F hex values below                     ║
+# ║ 2. Mirror those hex values in ~/.config/sway/waybar/style.css   ║
+# ║    (search for @define-color and replace the hex codes)          ║
+# ║ 3. Run: swaymsg reload                                          ║
+# ╚══════════════════════════════════════════════════════════════════╝
 
-#https://github.com/rkubosz/base16-sway
+set $base00 #000000
+set $base01 #111111
+set $base02 #222222
+set $base03 #333333
+set $base04 #666666
+set $base05 #999999
+set $base06 #CCCCCC
+set $base07 #FFFFFF
+set $base08 #999999
+set $base09 #999999
+set $base0A #CCCCCC
+set $base0B #999999
+set $base0C #CCCCCC
+set $base0D #999999
+set $base0E #CCCCCC
+set $base0F #666666
 
-set $base00 #031A16
-set $base01 #0B342D
-set $base02 #184E45
-set $base03 #2B685E
-set $base04 #5F9C92
-set $base05 #81B5AC
-set $base06 #A7CEC8
-set $base07 #D2E7E4
-set $base08 #3E9688
-set $base09 #3E7996
-set $base0A #3E4C96
-set $base0B #883E96
-set $base0C #963E4C
-set $base0D #96883E
-set $base0E #4C963E
-set $base0F #3E965B
+# base00-02=bg #3E3B33, base03=olive #8C9A6B, base04=peach #F3B49F, base05=rust #D9714C, base06-07=cream #FFE8DB
 
 #set $base00 #000000
 #set $base01 #121212
@@ -48,9 +59,9 @@ set $base0F #3E965B
 #set $base0F #444444
 
 # Property Name         Border  BG      Text    Indicator Child Border
-client.focused          $base05 $base0D $base00 $base0D $base0D
-client.focused_inactive $base01 $base01 $base05 $base03 $base01
-client.unfocused        $base01 $base00 $base05 $base01 $base01
-client.urgent           $base08 $base08 $base00 $base08 $base08
+client.focused          #FFFFFF $base00 #FFFFFF #FFFFFF $base00
+client.focused_inactive $base02 $base00 $base05 $base03 $base02
+client.unfocused        $base01 $base00 $base05 $base03 $base01
+client.urgent           #FFA14C #FFA14C $base00 #FFA14C #FFA14C
 client.placeholder      $base00 $base00 $base05 $base00 $base00
-client.background       $base07
+client.background       $base00

.config/sway/config.d/windows

@@ -10,7 +10,7 @@ for_window [window_type="menu"] floating enable
 
 for_window [shell="xwayland"] title_format "[XWayland] %title"
 for_window [title="LUCID"] floating enable
-for_window [title="Pydm|pydm"] floating enable
+for_window [title="(?i)pydm"] floating enable
 for_window [title="Form"] floating enable
 for_window [title="zoom"] floating enable