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>

debian/rules

@@ -0,0 +1,19 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+# Build runs `make`, which fetches the pinned ttyd release and verifies its sha256.
+
+# The tmux server unit owns every Claude process: never stop or restart it on
+# upgrade. The web unit (ttyd) is safe to restart and does so after upgrades.
+override_dh_installsystemd:
+	dh_installsystemd --name=devdesk-tmux --no-stop-on-upgrade
+	dh_installsystemd devdesk.service
+
+# ttyd is an upstream static binary; keep it byte-identical to its published checksum.
+override_dh_strip:
+	dh_strip -Xbin/ttyd
+
+override_dh_dwz:
+	dh_dwz -Xbin/ttyd