Add volume keys, fuzzel launcher, bluetooth speakers, update docs

- Volume key bindings for Das Keyboard knob (XF86Audio keys)
- Fuzzel app launcher on $mod+Space (Catppuccin Macchiato themed)
- Bluetooth enabled for Edifier R1280DBs speakers
- LibreWolf browser
- Docs updated: RAM at 3200 MT/s, audio, browser, theme

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

docs/changelog.d/feature-ringtail-nixos.infra.md

@@ -1 +1 @@
-Ringtail post-install: NixOS config (sway, fish, 1Password, Steam, chezmoi, dev tools, nix-ld), Dagger flake-lock pipeline, improved provision-ringtail workflow, services-check integration, and reference documentation.
+Ringtail post-install: NixOS config (sway with Catppuccin Macchiato theme, fish, 1Password, Steam, LibreWolf, Bluetooth audio, chezmoi, dev tools, nix-ld), Dagger flake-lock pipeline, improved provision-ringtail workflow, services-check integration, and reference documentation.

docs/reference/infrastructure/ringtail.md

@@ -16,7 +16,7 @@ Service host and gaming PC. Custom-built PC running NixOS.
 |----------|-------|
 | **Motherboard** | ASUS ROG Crosshair VI Hero (Wi-Fi AC) |
 | **CPU** | AMD Ryzen 7 1700X (8-core/16-thread, 3.4 GHz) |
-| **RAM** | 32 GB DDR4 (4x8 GB Corsair Vengeance CMK16GX4M2B3200C16, running at 2133 MT/s) |
+| **RAM** | 32 GB DDR4 (4x8 GB Corsair Vengeance CMK16GX4M2B3200C16, 3200 MT/s DOCP) |
 | **GPU** | NVIDIA GeForce RTX 4080 (AD103, 16 GB VRAM) |
 | **Monitor** | HP OMEN 27i IPS (2560x1440, 165 Hz, DisplayPort) |
 | **Storage (boot)** | Samsung 970 PRO 1TB NVMe |
@@ -29,8 +29,10 @@ Service host and gaming PC. Custom-built PC running NixOS.
 
 Managed declaratively via `nixos/ringtail/configuration.nix`. Home-manager handles ringtail-specific sway/waybar config; chezmoi manages cross-platform dotfiles.
 
-- **Desktop:** Sway (Wayland) with waybar and wezterm
+- **Desktop:** Sway (Wayland, Catppuccin Macchiato theme) with waybar and wezterm
+- **Browser:** LibreWolf
 - **Gaming:** Steam (library on `/mnt/games`), 8BitDo controller via Steam Input
+- **Audio:** Edifier R1280DBs (Bluetooth), PipeWire
 - **Secrets:** 1Password CLI + GUI (NixOS modules for polkit/setgid integration)
 - **Runtimes:** mise manages Node, Python, Rust, .NET; nix-ld enables dynamically linked binaries
 - **Dotfiles:** `chezmoi init eblume && chezmoi apply`
@@ -51,7 +53,7 @@ This updates `flake.lock` via Dagger, verifies the current commit is pushed to f
 
 **No TPM:** `systemd.tpm2.enable = false` prevents 90s boot delay.
 
-**RAM speed:** Running at 2133 MT/s (rated 3200). XMP may need enabling in BIOS.
+**RAM speed:** Running at 3200 MT/s via DOCP 1 (BIOS 8902+).
 
 ## Related
 

nixos/ringtail/configuration.nix

@@ -146,6 +146,7 @@ in
     openssl
     gnupg
     unzip
+    fuzzel
     librewolf
   ];
 
@@ -230,6 +231,17 @@ in
             bg = "~/.config/sway/wallpaper.jpg fill";
           };
         };
+        keybindings = let mod = "Mod4"; in {
+          "${mod}+Return" = "exec wezterm";
+          "${mod}+Shift+q" = "kill";
+          "${mod}+d" = "exec wmenu-run";
+          "${mod}+space" = "exec fuzzel";
+          "${mod}+Shift+c" = "reload";
+          "--locked XF86AudioMute" = "exec pactl set-sink-mute @DEFAULT_SINK@ toggle";
+          "--locked XF86AudioLowerVolume" = "exec pactl set-sink-volume @DEFAULT_SINK@ -5%";
+          "--locked XF86AudioRaiseVolume" = "exec pactl set-sink-volume @DEFAULT_SINK@ +5%";
+          "--locked XF86AudioMicMute" = "exec pactl set-source-mute @DEFAULT_SOURCE@ toggle";
+        };
         startup = [
           { command = "1password"; }
           { command = "steam"; }
@@ -237,6 +249,30 @@ in
       };
     };
 
+    programs.fuzzel = {
+      enable = true;
+      settings = {
+        main = {
+          font = "VictorMono Nerd Font:size=14";
+          terminal = "wezterm";
+          width = 40;
+          horizontal-pad = 16;
+          vertical-pad = 8;
+          border-radius = 8;
+          border-width = 2;
+        };
+        colors = {
+          background = "24273add";
+          text = "cad3f5ff";
+          match = "8aadf4ff";
+          selection = "363a4fff";
+          selection-text = "cad3f5ff";
+          selection-match = "8aadf4ff";
+          border = "8aadf4ff";
+        };
+      };
+    };
+
     programs.waybar = {
       enable = true;
       settings = [{