feat: DevDesk v0.1.0, a persistent browser terminal for Claude Code

ttyd serves a single-file xterm.js UI styled with the LotusGuild TDS
(web_template base.css). Sessions live in a dedicated tmux server unit
(devdesk-tmux.service), so restarting or upgrading the web unit never
stops Claude. Each named session maps to a project directory. A Claude
SessionStart hook records the conversation ID, so after a reboot the
session resumes that exact conversation.

- bin/devdesk: attach / new / ls / end / pick, with an fzf picker
- ttyd requires a credential that NPM injects; origin check enabled
- debian/: dh 13 with --no-stop-on-upgrade for the tmux unit, bundled
  sha256-verified ttyd 1.7.7, lintian overrides, man page
- CI: lint, test, build, smoke-test, artifact; v* tags publish to the
  Gitea apt registry and create a release

Refs: tinker ticket 887531976

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libexec/devdesk-session-hook

@@ -0,0 +1,19 @@
+#!/bin/bash
+# Claude Code SessionStart hook (wired in via claude-settings.json). Records the
+# Claude session ID for the DevDesk session this Claude runs in, so that after a
+# reboot devdesk-claude-run can `claude --resume` exactly this conversation.
+# Fires on startup, resume, /clear and /compact. Must never block Claude.
+
+# shellcheck source=libexec/devdesk-lib.sh
+. "${DEVDESK_LIBEXEC:-/usr/lib/devdesk}/devdesk-lib.sh" || exit 0
+
+[ -n "${DEVDESK_SESSION:-}" ] || exit 0
+dd_valid_name "$DEVDESK_SESSION" || exit 0
+
+input=$(cat)
+id=$(jq -r '.session_id // empty' <<<"$input" 2>/dev/null)
+source=$(jq -r '.source // empty' <<<"$input" 2>/dev/null)
+[ -n "$id" ] || exit 0
+
+dd_registry_set_claude "$DEVDESK_SESSION" "$id" "$source" 2>/dev/null
+exit 0