feat: refresh alacritty + powerlevel10k look

.pre-commit-config.yaml

@@ -5,22 +5,31 @@ repos:
     hooks:
       - id: stylua
 
+  # p10k.zsh is generated by `p10k configure` and uses zsh-only constructs
+  # (e.g. `() { … }` anonymous functions) that shellcheck and shfmt — both
+  # bash-targeted — can't parse, leading to false positives or destructive
+  # reformats. Excluded narrowly; other hand-written .zsh files in this repo
+  # stay POSIX/bash-compatible and remain in scope.
   - repo: https://github.com/shellcheck-py/shellcheck-py
     rev: v0.11.0.1
     hooks:
       - id: shellcheck
-        exclude: '\.tmpl$'
+        exclude: '\.tmpl$|p10k\.zsh$'
 
   - repo: https://github.com/scop/pre-commit-shfmt
     rev: v3.13.1-1
     hooks:
       - id: shfmt
-        exclude: '\.tmpl$'
+        exclude: '\.tmpl$|p10k\.zsh$'
 
   - repo: https://github.com/crate-ci/typos
     rev: v1
     hooks:
       - id: typos
+        # Same file: p10k's generated tokens trip typos' English-typo
+        # heuristics and get rewritten destructively. The file is regenerated
+        # by `p10k configure`, so an inline allow-list would rot.
+        exclude: 'p10k\.zsh$'
 
   - repo: https://github.com/gitleaks/gitleaks
     rev: v8.30.0

dot_config/alacritty/alacritty.toml.tmpl

@@ -2,6 +2,12 @@
 import = ["~/.config/alacritty/catppuccin-macchiato.toml", "~/.config/alacritty/key_bindings.toml"]
 live_config_reload = true
 
+[colors]
+# Apply window.opacity to every cell, not just those using the default
+# background. Without this, tmux's themed pane backgrounds (status bar,
+# dim-inactive-panes) paint opaque and defeat the see-through effect.
+transparent_background_colors = true
+
 [env]
 TERM = "xterm-256color"
 
@@ -69,9 +75,22 @@ args = [
 ]
 
 [window]
-decorations = "none"
-startup_mode = "Fullscreen"
+{{- if eq .chezmoi.os "darwin" }}
+# Buttonless keeps the native macOS title-bar area (so opacity/blur
+# bleed through it for a uniform frosted-glass look) but hides the
+# traffic-light buttons, freeing the top-left for tmux's status bar.
+decorations = "Buttonless"
+# Left option sends Esc-prefix so emacs-style Alt-bindings reach the
+# shell (e.g. fzf-cd-widget on Alt+C). Right option still composes
+# accents.
+option_as_alt = "OnlyLeft"
+{{- else }}
+decorations = "Full"
+{{- end }}
+opacity = 0.7
+# blur only takes effect on macOS / KDE Wayland; harmless no-op elsewhere
+blur = true
 
 [window.padding]
-x = 6
-y = 6
+x = 3
+y = 3