fix(install): source dtach-router at login instead of executing it

Executing dtach-router broke its return-based interactive guard and
errored on /dev/tty in non-interactive login shells (bash -lc, cron,
scp). It is now sourced via a guarded, idempotent ~/.profile block
(case $- in *i*) ... . dtach-router) installed by wire_dtach_profile(),
which migrates the old execute-based block. Also adds cc (create) and
d (re-summon) aliases to bashrc-linux.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CN1KSmsuLG6TxSeN5m8xvM

bash/bashrc-linux

@@ -111,3 +111,11 @@ function set_prompt {
 trap 'timer_start' DEBUG
 PROMPT_COMMAND='set_prompt'
 ## Lancement des commandes au demarrages
+
+# claude-dans-dtach : creer une session (claude tournant dans dtach, detache via Ctrl-\).
+# Usage : cd ~/projets/seo && cc seo   -> session nommee "seo".
+dtach_claude() { dtach -c "$HOME/.dtach/${1:-claude-$(date +%H%M%S)}" -e '^\' claude; }
+alias cc='dtach_claude'
+
+# Rappeler a la demande le menu de reprise (sinon il s'affiche seul au login SSH).
+alias d='source ~/.local/bin/dtach-router'