feat: v2.6.0 — Chat UI composer (+ menu, project files, activity panel, permission mode, Stop), git on a workspace's extra folders (#70), long paste as a file (#68), S3 server mode (experimental)

Chat UI:
- Each Claude/Codex session keeps its own chat/terminal view; Settings only
  sets how new sessions open.
- Composer + menu: upload, project files and folders (#54, also dragged from
  the Files/Changes tree), context files, recent uploads, skills, plugins.
- Activity side panel (progress, outputs, files read, uploads, memory,
  skills, connectors) with a file preview; edited-file counts per turn.
- Permission-mode chip (Shift+Tab steps, read back from the pane:
  server/lib/pane-mode.js, GET|POST /api/run/:id/permission-mode).
- Stop (Esc) while the main agent works; the status is checked per agent
  (with session_id /api/agents ignores its status filter) and re-read every
  5 s while Stop shows.
- Dropped images shown in the conversation (GET /api/run/drop/:name, the
  requester's own drop dir), full-size viewer.
- A plain-text paste over 5,000 characters is attached as pasted-text.txt,
  so no prompt reaches tmux/argv limits (#68).

Changes panel: every /api/lanes/:id/git* route takes ?source=<lane_sources
id> (sourceFolder; ENOSOURCE otherwise) and a folder picker switches the
whole panel to a workspace's extra folder (#70).

Server mode S3 (one Linux user per account) — experimental, verified with
fake sudo plus a P6 managed-settings spike on a test account:
- member tmux listing runs in the background (cached, 15 s => unknown);
- transcript snapshot copy is async, chunked, temp file + rename;
- Express Layer patch only on Express 4;
- tmux capturePane/sendKey go to the member's own server.

Docs: the multi-user design moved in as docs/plans/server-mode/README.md
(the AgentHub-Server repo is gone); S3-PLAN P6 result; LANES/API/openapi.

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

@@ -186,14 +186,18 @@
     "keep": "Keep editing"
   },
   "auth": {
-    "title": "Sign in to AgentHub",
+    "title": "Welcome back",
+    "subtitle": "Sign in to AgentHub with your account",
     "username": "Username",
     "password": "Password",
+    "showPassword": "Show password",
+    "hidePassword": "Hide password",
     "submit": "Sign in",
     "submitting": "Signing in…",
     "failed": "Wrong username or password",
     "tooMany": "Too many failed attempts — try again in a few minutes",
     "logout": "Sign out",
+    "noAccount": "No account yet? Ask your administrator to create one.",
     "signedInAs": "Signed in as {{name}} ({{role}})"
   },
   "insights": {

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

@@ -91,10 +91,8 @@
   "changes.range.work": "Uncommitted",
   "changes.range.workHint": "Working tree vs HEAD — what has been touched and not committed",
   "changes.refresh": "Refresh",
-  "changes.resize": "Resize the changes panel (next: {{size}})",
-  "changes.size.compact": "Narrow",
-  "changes.size.half": "Medium",
   "changes.size.full": "Full screen",
+  "changes.restore": "Restore size",
   "changes.fileCount_one": "{{count}} file",
   "changes.fileCount_other": "{{count}} files",
   "changes.dropEdits": "Discard your unsaved edits to this file?",
@@ -102,6 +100,7 @@
   "changes.title": "Changes",
   "changes.truncated": "Some changes were left out to keep this panel responsive.",
   "changes.unavailable": "This workspace's directory is not a readable git repository.",
+  "changes.unavailableFolder": "This folder is not a readable git repository.",
   "changes.unstage": "Unstage this file",
   "changes.changesView": "Changes",
   "changes.wholeFile": "Whole file",
@@ -134,8 +133,6 @@
   "destructive.reset.survives": "Gitignored files such as node_modules and .env are kept; untracked files are deleted.",
   "destructive.reset.title": "Reset managed worktree?",
   "destructive.warning.no-remote": "No Git remote is configured, so nothing here is backed up remotely. You can still proceed.",
-  "empty.body": "A workspace is one working directory the dashboard follows — its pipeline, sessions and terminal. Click anywhere on this card to add one, or from a terminal:",
-  "empty.title": "No workspaces yet",
   "features.archived": "archived",
   "features.live": "Live",
   "features.viewingArchived": "Viewing archived feature \"{{slug}}\" — the workspace keeps running; this is a read-only snapshot.",
@@ -298,6 +295,7 @@
   "menu.remove": "Delete workspace…",
   "panel.changes": "Changes",
   "panel.analyst": "Analyst",
+  "panel.folder": "Folder to show changes for",
   "replay.placeholder": "Message to continue this session…",
   "replay.hint": "Sending resumes the session in a free pane.",
   "replay.send": "Send",
@@ -316,6 +314,10 @@
   "tree.search": "Search workspaces and sessions",
   "tree.toolFilter": "Filter by tool",
   "tree.allTools": "All tools",
+  "tree.ownerYou": "{{name}} (you)",
+  "tree.noOwner": "No owner",
+  "tree.ownerToggle": "Show or hide {{name}}'s workspaces",
+  "tree.readOnly": "{{name}}'s workspace — read only. A session opens its analysis page.",
   "tree.newSession": "New session",
   "tree.noSessions": "No sessions yet",
   "tree.transcriptHint": "No live pane — opens its conversation; a message you send resumes it",
@@ -389,6 +391,8 @@
   "panes.split.bottom": "Split down",
   "panes.full": "A tab holds at most 4 panes",
   "panes.newTerminal": "New terminal",
+  "panes.showChat": "Show as chat",
+  "panes.showTerminal": "Show the terminal",
   "panes.close": "Move to its own tab (the session keeps running)",
   "panes.resize": "Resize panes",
   "tabs.home": "Workspace home",

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

@@ -64,7 +64,7 @@
     "goWorkspaces": "Go to Workspaces",
     "add": {
       "title": "Create your first workspace",
-      "body": "A workspace is one project folder where your agents work. Click here to add one."
+      "body": "A workspace is one project folder where your agents work. Click + beside Workspaces in the sidebar to add one."
     },
     "folder": {
       "title": "Choose the project folder",

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

@@ -85,7 +85,38 @@
   "chat": {
     "placeholder": "Write a message…",
     "send": "Send",
-    "hint": "Enter sends · permission prompts and menus need the terminal (Settings → Appearance → Chat UI)",
-    "notSent": "The terminal is not connected — the message was not sent."
+    "notSent": "The terminal is not connected — the message was not sent.",
+    "stop": "Stop",
+    "notStopped": "The terminal is not connected — nothing was stopped.",
+    "add": "Add files, skills…",
+    "upload": "Upload or add files",
+    "projectFiles": "Project files",
+    "contextFiles": "Context files",
+    "recentUploads": "Recent uploads",
+    "searchFiles": "Search files and folders…",
+    "skills": "Skills",
+    "plugins": "Plugins",
+    "manageSkills": "Manage skills",
+    "managePlugins": "Manage plugins",
+    "none": "Nothing here yet",
+    "fromPlugin": "{{name}} plugin",
+    "modeFailed": "Could not change the permission mode: {{message}}",
+    "outline": {
+      "progress": "Progress",
+      "outputs": "Outputs",
+      "connectors": "Connectors",
+      "empty": "Nothing yet",
+      "hide": "Hide side panel",
+      "show": "Activity panel",
+      "copyPath": "Copy path: {{path}}",
+      "panel": "Session activity panel",
+      "used": "Used in this session",
+      "uploads": "Uploads",
+      "files": "Files read",
+      "memory": "Memory",
+      "close": "Close",
+      "noPreview": "No preview for this file here",
+      "truncated": "Showing the first part of this file"
+    }
   }
 }

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

@@ -196,7 +196,10 @@
       "agents_other": "ran {{count}} agents",
       "tools_one": "used a tool",
       "tools_other": "used {{count}} tools"
-    }
+    },
+    "edited_one": "Edited {{count}} file",
+    "edited_other": "Edited {{count}} files",
+    "working": "Thinking…"
   },
   "overview": {
     "agent": "Agent",

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

@@ -1022,9 +1022,9 @@
   },
   "chatUi": {
     "title": "Chat UI",
-    "description": "How a Claude or Codex session opens in its workspace. Saved for your account only.",
-    "label": "Open sessions as a chat",
-    "labelDesc": "Show every Claude or Codex session's conversation like Claude Desktop, with a message box, instead of its terminal. Permission prompts and menus still need the terminal: turn this off to answer them.",
+    "description": "How a new Claude or Codex session opens in its workspace. Saved for your account only.",
+    "label": "Open new sessions as a chat",
+    "labelDesc": "A Claude or Codex session first shows its conversation like Claude Desktop, with a message box, instead of its terminal. Each session then keeps its own view: the chat/terminal button beside a pane's split buttons switches it. Permission prompts and menus still need the terminal.",
     "saveFailed": "Could not save: {{message}}"
   }
 }

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

@@ -69,5 +69,7 @@
   "readOnly": "Analysts can view accounts but not change them.",
   "auditTitle": "Audit log",
   "auditDescription": "Account changes made here, and each time an admin or analyst opened a session a developer owns.",
-  "auditEmpty": "Nothing recorded yet."
+  "auditEmpty": "Nothing recorded yet.",
+  "activeCount": "{{n}} active",
+  "cost30d": "Cost · 30 days"
 }