feat: v2.7.8 — Artifacts hub, clone related repos as extra folders, quieter resume prompt

- Artifacts (/artifacts): claude.ai pages sessions publish (captured from the
  Artifact tool's hook), pinned workspace files, skills and plugins, each
  kept as a snapshot; shared ones appear in a Hub and a skill or plugin
  installs into the viewer's own account (server/lib/artifacts.js,
  /api/artifacts, docs/plans/artifacts/).
- Workspace extra folders: clone one or more related repos beside the
  workspace and add them in one step (POST /api/lanes/:id/sources/clone).
- A pane that ended by itself while tmux kept running is no longer offered
  for resume (tmux.serverStartedAt in reconcileOrphans).
- Changes panel: a folder that is not a git repo opens on Files, and its
  files open from there.
- Plus the parallel sessions' work in this tree: File Explorer button in the
  panel header, user delete, RSA SSH keys, chat/terminal and pet fixes.

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

client/src/i18n/locales/en/artifacts.json

@@ -0,0 +1,75 @@
+{
+  "title": "Artifacts",
+  "subtitle": "What your agents produced — claude.ai pages, files, skills and plugins — kept in one place.",
+  "subtitleServer": "What your agents produced — claude.ai pages, files, skills and plugins. Share one and it appears in the Hub for everyone.",
+  "tab.mine": "My library",
+  "tab.hub": "Hub",
+  "kind.all": "All",
+  "kind.page": "Pages",
+  "kind.file": "Files",
+  "kind.skill": "Skills",
+  "kind.plugin": "Plugins",
+  "kindOne.page": "Page",
+  "kindOne.file": "File",
+  "kindOne.skill": "Skill",
+  "kindOne.plugin": "Plugin",
+  "search": "Search artifacts…",
+  "add": "Add",
+  "add.page": "claude.ai link",
+  "add.file": "File from a workspace",
+  "add.skill": "Skill",
+  "add.plugin": "Plugin",
+  "empty.mine": "Nothing here yet. Pages your sessions publish appear on their own; add files, skills and plugins with Add.",
+  "empty.hub": "Nobody has shared anything yet.",
+  "loading": "Loading…",
+  "by": "by {{name}}",
+  "shared": "Shared",
+  "share": "Share",
+  "unshare": "Unshare",
+  "shareDone": "Shared to the Hub",
+  "unshareDone": "Removed from the Hub",
+  "open": "Open",
+  "preview": "Preview",
+  "download": "Download",
+  "install": "Install",
+  "installs": "{{count}} installs",
+  "installed": "Installed to {{path}}",
+  "installedPlugin": "Installed {{name}} — start a new session (or /reload-plugins) to use it",
+  "rename": "Rename",
+  "delete": "Delete",
+  "deleteTitle": "Delete “{{title}}”?",
+  "deleteBody": "It is removed from your library and the Hub. Anything already installed from it stays installed.",
+  "deleteConfirm": "Delete",
+  "installTitle": "Install “{{title}}”?",
+  "installSkillBody": "These files are written to your own ~/.claude/skills/{{name}}/. A skill can carry scripts your agent will run — only install what you trust:",
+  "installPluginBody": "Runs, as your account: claude plugin marketplace add {{market}} and claude plugin install {{name}} --scope user. Only install what you trust.",
+  "installConfirm": "Install",
+  "replaceTitle": "Replace your skill “{{name}}”?",
+  "replaceBody": "You already have a skill with that name. Yours is moved to ~/.claude/agenthub-replaced-skills/, not deleted.",
+  "replaceConfirm": "Replace",
+  "installsOff": "Installs are off",
+  "installsSwitch": "Allow installing from the Hub",
+  "installsSwitchHint": "Off: nobody can install a shared skill or plugin into their account.",
+  "form.url": "claude.ai link",
+  "form.title": "Title (optional)",
+  "form.description": "Description (optional)",
+  "form.workspace": "Workspace",
+  "form.pickWorkspace": "Pick a workspace…",
+  "form.noCandidates": "No documents written by this workspace's sessions yet.",
+  "form.pinned": "Pinned",
+  "form.pin": "Pin",
+  "form.missing": "gone",
+  "form.skillFrom": "Skill",
+  "form.fromUser": "mine",
+  "form.fromWorkspace": "workspace",
+  "form.noSkills": "No skills found in your ~/.claude/skills or this workspace's .claude/skills.",
+  "form.pluginKey": "Plugin (name@marketplace)",
+  "form.market": "Marketplace (owner/repo or git URL)",
+  "form.save": "Add",
+  "form.cancel": "Cancel",
+  "added": "Added",
+  "files": "{{count}} files",
+  "close": "Close",
+  "fromSession": "From a session",
+  "form.saveEdit": "Save"
+}