feat(thunderbird): track non-private config in dotfiles

Mirror the firefox/ pattern for Thunderbird:

- thunderbird/user.js: telemetry off, safe-browsing off, remote images
  blocked, read receipts disabled, plain-text compose with flowed
  wrap at 72, vertical pane, calendar on Monday start
- run_onchange_after_deploy-thunderbird.sh.tmpl: detects default
  profile and copies tracked files in on any change
- meta/mail.txt: add thunderbird package (official repo)
- .chezmoiignore: exclude thunderbird/ from $HOME deployment
- README: mention Thunderbird + Bridge + Radicale stack

Accounts/credentials/mailbox data stay local per profile.

1 files changed, 24 insertions, 0 deletions

diff --git a/run_onchange_after_deploy-thunderbird.sh.tmpl b/run_onchange_after_deploy-thunderbird.sh.tmpl
new file mode 100644
index 0000000..f19eae0
--- /dev/null
+++ b/run_onchange_after_deploy-thunderbird.sh.tmpl
@@ -0,0 +1,24 @@
+#!/bin/sh
+# Deploy Thunderbird non-private configuration (user.js, optional chrome/).
+# chezmoi re-runs this script whenever any file under thunderbird/ changes.
+# thunderbird/ content hash: {{ output "sh" "-c" (printf "cd %q && find thunderbird -type f -exec sha256sum {} + | LC_ALL=C sort" .chezmoi.sourceDir) | sha256sum }}
+set -eu
+
+PROFILES_DIR="$HOME/.thunderbird"
+[ -d "$PROFILES_DIR" ] || exit 0
+
+PROFILE=$(find "$PROFILES_DIR" -maxdepth 1 -mindepth 1 -type d -name '*.default-default' | head -1)
+if [ -z "$PROFILE" ]; then
+    PROFILE=$(find "$PROFILES_DIR" -maxdepth 1 -mindepth 1 -type d -name '*.default*' | head -1)
+fi
+if [ -z "$PROFILE" ]; then
+    PROFILE=$(find "$PROFILES_DIR" -maxdepth 1 -mindepth 1 -type d | head -1)
+fi
+[ -n "$PROFILE" ] || exit 0
+
+cd "$CHEZMOI_SOURCE_DIR"
+find thunderbird -type f | while IFS= read -r src; do
+    dest="$PROFILE/${src#thunderbird/}"
+    mkdir -p "$(dirname "$dest")"
+    cp --remove-destination "$src" "$dest"
+done