[Update] bulk update

.editorconfig

@@ -0,0 +1,28 @@
+# Shell formatting for this repo.
+#
+# Both `shfmt` and the Claude format hook (common/.config/claude/hooks/format.py, which only
+# runs shfmt/fish_indent where an .editorconfig opts in) read this file, so the policy and the
+# tool that enforces it live in one place. Neovim reads it natively too.
+#
+# The settings were picked to stay as close as possible to how these scripts were already
+# written by hand: 2-space indent, `case` arms indented under `case`, and `&&`/`||` starting
+# the wrapped line rather than trailing the one before it (binary_next_line, which reproduces
+# the existing `\` continuations exactly). shfmt still rewrites
+# a few things no option controls — one-line `case x) a; b ;;` arms and `{ a; b; }` guards
+# are split across lines, and `> file` loses its space — which is the one-time cost of
+# having a formatter own the layout instead of maintaining it by hand.
+#
+# `keep_padding` is deliberately NOT set: it is deprecated in shfmt, and it indents the
+# statements it splits by the padding column, producing a cascading staircase.
+#
+# Scoped to shell on purpose — there is no [*] section, so the repo's other filetypes are
+# untouched (a [*] block would retune all of them in any editorconfig-aware editor, and
+# would also switch on the hook's fish_indent for every fish file).
+
+root = true
+
+[{*.sh,dotsync,dotpub}]
+indent_style = space
+indent_size = 2
+switch_case_indent = true
+binary_next_line = true