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>

Makefile

@@ -0,0 +1,54 @@
+# DevDesk build. debhelper drives this: `make` (all), `make test`, `make install DESTDIR=…`.
+
+PREFIX     ?= /usr
+SYSCONFDIR ?= /etc
+DESTDIR    ?=
+LIBDIR     := $(PREFIX)/lib/devdesk
+SHAREDIR   := $(PREFIX)/share/devdesk
+TTYD_ARCH  ?= x86_64
+
+SHELL_SCRIPTS := bin/devdesk $(wildcard libexec/devdesk-*) scripts/fetch-ttyd.sh debian/devdesk.postinst debian/devdesk.postrm
+WEB_SOURCES   := web/build.mjs web/index.template.html web/styles.css $(wildcard web/src/*.js) \
+                 vendor/web_template/base.css debian/changelog
+
+.PHONY: all lint test install clean sync-template
+
+all: dist/index.html build/ttyd
+
+node_modules/.package-lock.json: package.json package-lock.json
+	npm ci --no-audit --no-fund
+
+dist/index.html: node_modules/.package-lock.json $(WEB_SOURCES)
+	node web/build.mjs
+
+build/ttyd: vendor/ttyd/VERSION vendor/ttyd/SHA256SUMS scripts/fetch-ttyd.sh
+	scripts/fetch-ttyd.sh $@ $(TTYD_ARCH)
+	@touch $@
+
+lint: node_modules/.package-lock.json
+	npx eslint --max-warnings 0 --ext .js,.mjs web/src web/build.mjs tests/protocol.test.mjs
+	shellcheck -x $(SHELL_SCRIPTS)
+	jq empty share/claude-settings.json
+
+test: node_modules/.package-lock.json
+	node --test tests/
+	bats tests/
+
+install: all
+	install -d $(DESTDIR)$(PREFIX)/bin $(DESTDIR)$(LIBDIR)/bin $(DESTDIR)$(SHAREDIR) $(DESTDIR)$(SYSCONFDIR)/devdesk
+	install -m 0755 bin/devdesk $(DESTDIR)$(PREFIX)/bin/devdesk
+	install -m 0644 libexec/devdesk-lib.sh $(DESTDIR)$(LIBDIR)/devdesk-lib.sh
+	install -m 0755 libexec/devdesk-picker libexec/devdesk-claude-run libexec/devdesk-session-hook \
+		libexec/devdesk-tmux-ready libexec/devdesk-serve $(DESTDIR)$(LIBDIR)/
+	install -m 0755 build/ttyd $(DESTDIR)$(LIBDIR)/bin/ttyd
+	install -m 0644 dist/index.html share/tmux.conf share/claude-settings.json $(DESTDIR)$(SHAREDIR)/
+	install -m 0644 etc/env $(DESTDIR)$(SYSCONFDIR)/devdesk/env
+
+clean:
+	rm -rf dist build
+
+# Refresh the vendored design system: make sync-template TEMPLATE=../web_template
+sync-template:
+	@test -n "$(TEMPLATE)" || { echo "usage: make sync-template TEMPLATE=/path/to/web_template"; exit 2; }
+	cp $(TEMPLATE)/base.css vendor/web_template/base.css
+	@echo "Updated base.css — record the commit in vendor/web_template/UPSTREAM: $$(git -C $(TEMPLATE) rev-parse --short HEAD)"