Docker cases: seamless Claude auth (seed ~/.claude.json instead of the
corruption-prone single-file mount), full credential-store isolation for
claude + codex/gemini/gcloud/opencode (share only transcripts/rollouts,
seed the rest), auto-build the base image on first use, C.UTF-8 locale
(fixes box-drawing), collapsed/shortened Create-Case UI + short "(docker)"
case-menu tags, and w<n>-<case> tab naming for docker/remote sessions.
Also: opt-in File Viewer header button; fix a TZ-boundary flaky test.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
node:22-bookworm-slim ships a `node` user at uid 1000, so `useradd -u 1000`
failed. Auto-assign the uid and rely on gid-0 + group-writable HOME so any
runtime `--user <hostUid>:0` can write $HOME. Verified: image builds; toolchain
(node/tmux/claude/codex/gemini/opencode) present; `--user 1000:0` writes
/home/agent and `claude --version` runs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>