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>

vendor/web_template/UPSTREAM

@@ -0,0 +1,11 @@
+Source:   https://code.lotusguild.org/LotusGuild/web_template
+Commit:   fca7acb (origin/main, 2026-10-03), base.css identical to bbec859
+File:     base.css only (base.js is deliberately not vendored, see below)
+Refresh:  make sync-template TEMPLATE=/path/to/web_template
+
+Known upstream issues reviewed 2026-10-06 (web_template#1): none affect the
+classes DevDesk uses (header, frame, section-header, btn, status, chip, badge,
+dot, ws-status, progress, kv-grid, footer-hints).
+
+base.js is not shipped because its global keydown handler swallows Escape
+(Claude Code's interrupt key) and Ctrl+K, and every lt.toast plays a beep.