diff --git a/package.json b/package.json
index 83d8990..d44dc5f 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "exbyte-depot",
   "private": true,
-  "version": "0.2.1",
+  "version": "0.2.2",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index f04f1c3..1533ea6 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -951,7 +951,7 @@ dependencies = [
 
 [[package]]
 name = "exbyte-depot"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index c6f1347..c5c02cf 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "exbyte-depot"
-version = "0.2.1"
+version = "0.2.2"
 description = "A Tauri App"
 authors = ["you"]
 edition = "2021"
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 38a4c47..fd8acbd 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -6,7 +6,7 @@ use std::io::{BufRead, BufReader, Write};
 use std::process::{Command, Stdio};
 use std::sync::{Mutex, OnceLock};
 use std::time::Instant;
-use tauri::{AppHandle, Emitter, State};
+use tauri::{AppHandle, Emitter, Manager, State};
 
 /// App handle stashed at startup so the low-level p4 helpers can emit a live
 /// command log to the frontend (a Perforce-style "Log" panel).
@@ -683,13 +683,17 @@ async fn open_in_vscode(state: State<'_, AppState>, depot: String) -> Result<(),
         .next()
         .and_then(|v| v.get("path").and_then(|p| p.as_str()).map(String::from))
         .ok_or_else(|| "Could not resolve the file path".to_string())?;
+    if !std::path::Path::new(&local).exists() {
+        return Err(format!("File is not on disk yet (not synced): {local}"));
+    }
     let mut c = Command::new("cmd");
     #[cfg(windows)]
     {
         use std::os::windows::process::CommandExt;
         c.creation_flags(0x0800_0000);
     }
-    c.arg("/C").arg(format!("code \"{local}\""));
+    // pass args separately so Rust quotes only the path (no double-escaping through cmd)
+    c.args(["/C", "code", &local]);
     c.spawn()
         .map_err(|e| format!("VS Code not found (is `code` in PATH?): {e}"))?;
     Ok(())
@@ -917,6 +921,26 @@ async fn read_depot(state: State<'_, AppState>, depot: String) -> Result<tauri::
         .map_err(|e| format!("Could not read file: {e}"))
 }
 
+/// Read raw file bytes at an exact revision via `p4 print` (works for
+/// submitted / historical revisions that may not be synced locally).
+/// `spec` is a depot path optionally suffixed with a revision, e.g.
+/// `//depot/foo.cpp#7`. `-q` suppresses the leading file header line.
+#[tauri::command]
+async fn print_depot(state: State<'_, AppState>, spec: String) -> Result<tauri::ipc::Response, String> {
+    let conn = current(&state)?;
+    let out = p4_cmd(&conn, false)
+        .args(["print", "-q", &spec])
+        .output()
+        .map_err(|e| format!("Failed to start p4: {e}"))?;
+    if !out.status.success() && out.stdout.is_empty() {
+        let e = String::from_utf8_lossy(&out.stderr).trim().to_string();
+        log_p4(&["print", "-q", &spec], 0, false, Some(&e));
+        return Err(if e.is_empty() { "p4 print failed".into() } else { e });
+    }
+    log_p4(&["print", "-q", &spec], out.stdout.len() as i64, true, None);
+    Ok(tauri::ipc::Response::new(out.stdout))
+}
+
 /// Switch the active workspace (client) without re-authenticating.
 #[tauri::command]
 async fn p4_switch_client(state: State<'_, AppState>, client: String) -> Result<Value, String> {
@@ -939,6 +963,113 @@ async fn p4_depots(state: State<'_, AppState>) -> Result<Vec<Value>, String> {
     run_json(&conn, &["depots"])
 }
 
+/// All Perforce users (with last-access time → activity indicator).
+#[tauri::command]
+async fn p4_users(state: State<'_, AppState>) -> Result<Vec<Value>, String> {
+    let conn = current(&state)?;
+    run_json(&conn, &["users"])
+}
+
+/// All groups on the server, or the groups a given user belongs to.
+#[tauri::command]
+async fn p4_groups(state: State<'_, AppState>, user: String) -> Result<Vec<Value>, String> {
+    let conn = current(&state)?;
+    if user.is_empty() {
+        run_json(&conn, &["groups"])
+    } else {
+        run_json(&conn, &["groups", "-u", &user])
+    }
+}
+
+/// Add or remove a user from a group (role assignment). Requires admin/super.
+/// Edits the group spec's Users list and pipes it back via `group -i`.
+#[tauri::command]
+async fn p4_group_member(
+    state: State<'_, AppState>,
+    group: String,
+    user: String,
+    add: bool,
+) -> Result<String, String> {
+    let conn = current(&state)?;
+    let spec = run_text(&conn, &["group", "-o", &group])?;
+    // collect existing Users: entries (indented under the "Users:" field)
+    let mut users: Vec<String> = Vec::new();
+    let mut in_users = false;
+    let mut head = String::new();
+    for line in spec.lines() {
+        if line.starts_with("Users:") {
+            in_users = true;
+            continue;
+        }
+        if in_users {
+            if line.starts_with('\t') || line.starts_with(' ') {
+                let u = line.trim().to_string();
+                if !u.is_empty() {
+                    users.push(u);
+                }
+                continue;
+            } else if line.trim().is_empty() {
+                continue;
+            } else {
+                in_users = false; // next field — stop collecting
+            }
+        }
+        if !in_users {
+            head.push_str(line);
+            head.push('\n');
+        }
+    }
+    users.retain(|u| !u.eq_ignore_ascii_case(&user));
+    if add {
+        users.push(user.clone());
+    }
+    // rebuild spec: head (everything except Users:) + fresh Users section
+    let mut out = head.trim_end().to_string();
+    out.push_str("\n\nUsers:\n");
+    for u in &users {
+        out.push('\t');
+        out.push_str(u);
+        out.push('\n');
+    }
+    let mut child = p4_cmd(&conn, false)
+        .args(["group", "-i"])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .map_err(|e| format!("Failed to start p4: {e}"))?;
+    if let Some(si) = child.stdin.as_mut() {
+        si.write_all(out.as_bytes()).map_err(|e| e.to_string())?;
+    }
+    let res = child.wait_with_output().map_err(|e| e.to_string())?;
+    if !res.status.success() {
+        return Err(String::from_utf8_lossy(&res.stderr).trim().to_string());
+    }
+    Ok(String::from_utf8_lossy(&res.stdout).trim().to_string())
+}
+
+/// Path to the (git-ignored) OpenRouter API key, stored in the app config dir.
+fn ai_key_path() -> Option<std::path::PathBuf> {
+    let app = APP.get()?;
+    let dir = app.path().app_config_dir().ok()?;
+    Some(dir.join("openrouter.key"))
+}
+#[tauri::command]
+async fn read_ai_key() -> Result<String, String> {
+    Ok(ai_key_path()
+        .and_then(|p| std::fs::read_to_string(p).ok())
+        .map(|s| s.trim().to_string())
+        .unwrap_or_default())
+}
+#[tauri::command]
+async fn save_ai_key(key: String) -> Result<(), String> {
+    let p = ai_key_path().ok_or("No config dir")?;
+    if let Some(dir) = p.parent() {
+        let _ = std::fs::create_dir_all(dir);
+    }
+    std::fs::write(&p, key.trim()).map_err(|e| e.to_string())
+}
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     let mut builder = tauri::Builder::default()
@@ -989,8 +1120,14 @@ pub fn run() {
             p4_describe,
             read_file,
             read_depot,
+            print_depot,
             p4_switch_client,
             p4_depots,
+            p4_users,
+            p4_groups,
+            p4_group_member,
+            read_ai_key,
+            save_ai_key,
             p4_dirs,
         ])
         .run(tauri::generate_context!())
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 3c88e86..7aebfc0 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "exbyte-depot",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "identifier": "com.bonchellon.exbyte-depot",
   "build": {
     "beforeDevCommand": "npm run dev",
diff --git a/src/App.css b/src/App.css
index 17c6a21..1e40bfa 100644
--- a/src/App.css
+++ b/src/App.css
@@ -32,7 +32,9 @@ body{
 }
 button{font-family:var(--font)}
 
-.win{height:100vh;width:100%;display:flex;flex-direction:column;
+/* height divided by the zoom factor: CSS `zoom` shrinks the box but `vh` still
+   measures the unzoomed viewport, so without this a gap grows below at zoom<1 */
+.win{height:calc(100vh / var(--zoom,1));width:100%;display:flex;flex-direction:column;
   background:linear-gradient(180deg,var(--win-a),var(--win-b));overflow:hidden}
 
 /* titlebar + inline menu */
@@ -556,6 +558,23 @@ body.resizing{cursor:col-resize!important;user-select:none}
 /* virtualized changelist-file row (History detail) */
 .crow{position:absolute;left:0;right:0;height:52px;display:flex;gap:12px;align-items:center;padding:0 16px;border-bottom:1px solid var(--border-soft)}
 .crow:hover{background:var(--hover)}
+.crow.click{cursor:pointer}
+.crow.click:hover .crow-go{opacity:1;transform:translateX(0)}
+.crow.sel{background:rgba(124,110,246,.12);box-shadow:inset 2px 0 0 var(--accent)}
+.crow-go{margin-left:auto;flex:0 0 auto;color:var(--faint);font-size:18px;line-height:1;opacity:0;transform:translateX(-4px);transition:opacity .12s,transform .12s;display:flex;align-items:center}
+.crow-go svg{width:16px;height:16px}
+.gbtn.back{padding:6px 8px}.gbtn.back svg{width:16px;height:16px}
+/* History = GitHub-style split: changed-files list beside the file content (no covering) */
+.histsplit{display:flex;min-width:0;min-height:0;overflow:hidden}
+.histsplit>.right{flex:1 1 auto;min-width:0}
+/* explicit width via a state-driven CSS variable */
+.histsplit>.histlist{flex:none;width:var(--hist-w,340px);min-width:0;border-right:1px solid var(--border)}
+.histsplit.solo>.histlist{flex:1 1 auto;width:auto;border-right:none} /* nothing open → list fills the panel */
+/* plain in-flow 8px column between list and preview — only the cursor hints it's draggable.
+   position MUST override the base .vhandle{position:absolute}, or it falls out of the flex flow */
+.histsplit>.histh{position:relative;flex:none;width:8px;align-self:stretch;cursor:col-resize;background:transparent;top:auto;bottom:auto}
+.histsplit .histlist .crow-go{opacity:0}
+.histsplit .histlist .crow.sel .crow-go{opacity:1;transform:translateX(0)}
 .hnum{font-family:var(--mono);font-size:12px;color:var(--accent-2);font-variant-numeric:tabular-nums;flex:0 0 auto;padding-top:1px}
 .hbody{display:flex;flex-direction:column;gap:3px;min-width:0}
 .hdesc{font-size:13px;color:var(--txt);overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
@@ -638,3 +657,68 @@ body.resizing{cursor:col-resize!important;user-select:none}
   animation:toastin .25s ease;white-space:pre-wrap;text-align:center}
 .toast.err{border-color:rgba(242,99,126,.4);color:var(--del)}
 @keyframes toastin{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}
+
+/* ---------------- avatars ---------------- */
+.avatar{position:relative;flex:0 0 auto;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;letter-spacing:.02em;text-transform:uppercase;box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);user-select:none}
+.adot{position:absolute;right:-1px;bottom:-1px;width:9px;height:9px;border-radius:50%;border:2px solid var(--elevated);background:var(--faint)}
+.adot.active{background:#3ecb8f}.adot.recent{background:#f4c04e}.adot.idle{background:#6b6b7a}
+
+/* ---------------- AI commit summary ---------------- */
+.summrow{display:flex;gap:8px;align-items:stretch}
+.aibtn{flex:0 0 auto;display:flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:9px;padding:0 12px;
+  font-size:12px;font-weight:600;font-family:var(--font);cursor:pointer;color:var(--accent-2);
+  background:linear-gradient(135deg,rgba(124,110,246,.16),rgba(124,110,246,.06));transition:.15s}
+.aibtn:hover:not(:disabled){filter:brightness(1.12);border-color:rgba(124,110,246,.5)}
+.aibtn:disabled{opacity:.5;cursor:default}
+.aibtn svg{width:15px;height:15px}
+.aibtn.busy{color:var(--faint)}
+.aibtn.icon{padding:0;width:34px;justify-content:center}
+
+/* AI settings block inside Settings modal */
+.ai-set{margin-top:16px;padding-top:14px;border-top:1px solid var(--border-soft)}
+.ai-set-h{display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;color:var(--txt);margin-bottom:6px}
+.ai-set-h svg{width:16px;height:16px;color:var(--accent-2)}
+.keyfield{display:flex;align-items:center;gap:6px;flex:1;max-width:230px}
+.kf-in{flex:1;min-width:0;background:var(--panel);border:1px solid var(--border);border-radius:8px;padding:6px 9px;font-size:12px;color:var(--txt);outline:none;font-family:var(--font)}
+.kf-in.mono{font-family:var(--mono);font-size:11.5px}
+.kf-in:focus{border-color:var(--accent)}
+.kf-eye{flex:0 0 auto;width:28px;height:28px;border:1px solid var(--border);background:var(--panel);border-radius:8px;cursor:pointer;font-size:13px;line-height:1}
+.ai-hint{font-size:11px;color:var(--faint);line-height:1.5;margin-top:8px}
+
+/* ---------------- People & Roles ---------------- */
+.picker.wide{width:720px;max-width:94%;height:560px;max-height:82vh;display:flex;flex-direction:column}
+.ph-sub{margin-left:8px;font-size:11.5px;color:var(--faint);font-variant-numeric:tabular-nums}
+.picker.wide .ph-sub{margin-right:auto}
+.ur-body{flex:1;display:flex;min-height:0}
+.ur-list{flex:0 0 300px;display:flex;flex-direction:column;border-right:1px solid var(--border-soft);min-height:0}
+.ur-filter{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--border-soft)}
+.ur-filter svg{width:15px;height:15px;color:var(--faint);flex:0 0 auto}
+.ur-filter input{flex:1;background:none;border:none;outline:none;color:var(--txt);font-size:12.5px;font-family:var(--font)}
+.ur-scroll{flex:1;overflow-y:auto;padding:6px}
+.ur-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;cursor:pointer;transition:background .12s}
+.ur-row:hover{background:var(--hover)}
+.ur-row.on{background:rgba(124,110,246,.13);box-shadow:inset 0 0 0 1px rgba(124,110,246,.28)}
+.ur-meta{display:flex;flex-direction:column;gap:1px;min-width:0;flex:1}
+.ur-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:6px}
+.ur-you{font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--accent-2);background:rgba(124,110,246,.16);border-radius:6px;padding:1px 6px}
+.ur-sub{font-size:11px;color:var(--faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
+.ur-actd{width:8px;height:8px;border-radius:50%;flex:0 0 auto;background:var(--faint)}
+.ur-actd.active{background:#3ecb8f;box-shadow:0 0 0 3px rgba(62,203,143,.18)}
+.ur-actd.recent{background:#f4c04e}.ur-actd.idle{background:#4b4b58}
+.ur-empty{padding:16px;font-size:12px;color:var(--faint);text-align:center}
+.ur-detail{flex:1;display:flex;flex-direction:column;min-width:0;overflow-y:auto}
+.ur-dhead{display:flex;align-items:center;gap:14px;padding:18px 20px 14px;border-bottom:1px solid var(--border-soft)}
+.ur-dinfo{min-width:0}
+.ur-dname{font-size:16px;font-weight:700}
+.ur-dsub{font-size:12px;color:var(--faint);margin-top:2px}
+.ur-grouphd{display:flex;align-items:center;gap:8px;padding:14px 20px 8px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--faint)}
+.ur-groups{display:flex;flex-wrap:wrap;gap:8px;padding:0 20px}
+.ur-chip{display:flex;align-items:center;gap:7px;border:1px solid var(--border);background:var(--panel);color:var(--muted);
+  border-radius:9px;padding:7px 11px;font-size:12.5px;font-weight:500;font-family:var(--font);cursor:pointer;transition:.14s}
+.ur-chip:hover:not(:disabled){border-color:var(--accent);color:var(--txt)}
+.ur-chip:disabled{opacity:.6;cursor:default}
+.ur-chip.on{border-color:rgba(124,110,246,.5);background:rgba(124,110,246,.13);color:var(--txt)}
+.urc-box{width:15px;height:15px;border-radius:5px;border:1.5px solid var(--border);display:grid;place-items:center;flex:0 0 auto;background:var(--panel)}
+.ur-chip.on .urc-box{background:var(--accent);border-color:var(--accent);color:#fff}
+.urc-box svg{width:11px;height:11px}
+.ur-detail .ai-hint{padding:12px 20px 20px}
diff --git a/src/App.tsx b/src/App.tsx
index c749d9b..23856ee 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -7,8 +7,9 @@ import ModelViewer from "./ModelViewer";
 import CodeView from "./CodeView";
 import UpdateBanner from "./Updater";
 import "./App.css";
-import { p4, statusOf, splitPath, kindOf, fmtTime, describeFiles, leaf, saveSession, loadSession, clearSession, saveScope, loadScope, P4Info, OpenedFile, Client, Change, Session, Describe, Dir } from "./p4";
+import { p4, statusOf, splitPath, kindOf, fmtTime, describeFiles, leaf, saveSession, loadSession, clearSession, saveScope, loadScope, fileBytes, P4Info, OpenedFile, Client, Change, Session, Describe, Dir, User } from "./p4";
 import { t, LANG, LANGS, setLangGlobal, Lang } from "./i18n";
+import { aiSummary, initials, avatarColor, activity, getModel, setModel, getKeyLocal, setKeyLocal } from "./ai";
 
 /* ---------------- window controls (frameless) ---------------- */
 function WinControls() {
@@ -37,6 +38,10 @@ const I = {
   spinner: <svg viewBox="0 0 24 24" fill="none"><circle cx="12" cy="12" r="9" stroke="rgba(255,255,255,.3)" strokeWidth="2"/><path d="M12 3a9 9 0 0 1 9 9" stroke="#fff" strokeWidth="2" strokeLinecap="round"/></svg>,
   cube: <svg viewBox="0 0 24 24" fill="none"><path d="M12 2 3 7v10l9 5 9-5V7l-9-5Z" stroke="currentColor" strokeWidth="1.5" strokeLinejoin="round"/><path d="m3 7 9 5 9-5M12 12v10" stroke="currentColor" strokeWidth="1.5"/></svg>,
   revert: <svg viewBox="0 0 24 24" fill="none"><path d="M4 12a8 8 0 0 1 14-5.3L21 9M21 4v5h-5" stroke="currentColor" strokeWidth="1.6" strokeLinecap="round" strokeLinejoin="round"/></svg>,
+  back: <svg viewBox="0 0 24 24" fill="none"><path d="M19 12H5M11 6l-6 6 6 6" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"/></svg>,
+  chevron: <svg viewBox="0 0 24 24" fill="none"><path d="M9 6l6 6-6 6" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"/></svg>,
+  spark: <svg viewBox="0 0 24 24" fill="none"><path d="M12 3l1.8 5.2L19 10l-5.2 1.8L12 17l-1.8-5.2L5 10l5.2-1.8L12 3Z" stroke="currentColor" strokeWidth="1.5" strokeLinejoin="round"/><path d="M18.5 15.5l.7 2 2 .7-2 .7-.7 2-.7-2-2-.7 2-.7.7-2Z" fill="currentColor"/></svg>,
+  people: <svg viewBox="0 0 24 24" fill="none"><circle cx="9" cy="8" r="3.2" stroke="currentColor" strokeWidth="1.6"/><path d="M3.5 19a5.5 5.5 0 0 1 11 0M16 5.2a3.2 3.2 0 0 1 0 6.1M17.5 14.2A5.5 5.5 0 0 1 20.5 19" stroke="currentColor" strokeWidth="1.6" strokeLinecap="round"/></svg>,
   clock: <svg viewBox="0 0 24 24" fill="none"><circle cx="12" cy="12" r="8.5" stroke="currentColor" strokeWidth="1.6"/><path d="M12 8v4l2.5 2.5" stroke="currentColor" strokeWidth="1.6" strokeLinecap="round"/></svg>,
   log: <svg viewBox="0 0 24 24" fill="none"><rect x="4" y="3" width="16" height="18" rx="2" stroke="currentColor" strokeWidth="1.6"/><path d="M8 8h8M8 12h8M8 16h5" stroke="currentColor" strokeWidth="1.6" strokeLinecap="round"/></svg>,
   vscode: <svg viewBox="0 0 24 24" fill="none"><path d="m9 8-5 4 5 4M15 8l5 4-5 4" stroke="currentColor" strokeWidth="1.7" strokeLinecap="round" strokeLinejoin="round"/></svg>,
@@ -69,6 +74,10 @@ function useZoom(): [number, (z: number) => void] {
   });
   useEffect(() => {
     (document.documentElement.style as CSSStyleDeclaration & { zoom: string }).zoom = String(zoom);
+    // CSS `zoom` scales layout but leaves `100vh` measuring the *unzoomed* viewport,
+    // so at zoom<1 a gap grows at the bottom. Expose the factor so the root can
+    // compensate its height (see `.win` in App.css).
+    document.documentElement.style.setProperty("--zoom", String(zoom));
     try { localStorage.setItem("exd-zoom", String(zoom)); } catch {}
   }, [zoom]);
   return [zoom, (z) => setZoom(Math.min(2, Math.max(0.5, Math.round(z * 100) / 100)))];
@@ -262,6 +271,7 @@ type ModalState =
   | { kind: "workspaces"; items: Client[]; current: string }
   | { kind: "scope"; path: string; dirs: Dir[] }
   | { kind: "settings" }
+  | { kind: "users" }
   | { kind: "about" };
 
 type LogEntry = { id: number; cmd: string; count: number; ok: boolean; err?: string | null };
@@ -280,8 +290,11 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   const [expandedCL, setExpandedCL] = useState<Set<string>>(new Set()); // expanded pending changelist cards
   const [prompt, setPrompt] = useState<null | { title: string; label: string; value: string; onSave: (v: string) => void }>(null);
   const [filter, setFilter] = useState("");
-  const [desc, setDesc] = useState("");        // commit summary (first line)
-  const [descBody, setDescBody] = useState(""); // extended description (optional)
+  const [desc, setDesc] = useState(() => { try { return localStorage.getItem("exd-draft-summary") || ""; } catch { return ""; } });        // commit summary (first line) — persisted draft
+  const [descBody, setDescBody] = useState(() => { try { return localStorage.getItem("exd-draft-body") || ""; } catch { return ""; } }); // extended description (optional) — persisted draft
+  // keep the typed commit message as a draft so a refresh/restart never loses it; it is cleared only on Submit
+  useEffect(() => { try { localStorage.setItem("exd-draft-summary", desc); } catch {} }, [desc]);
+  useEffect(() => { try { localStorage.setItem("exd-draft-body", descBody); } catch {} }, [descBody]);
   const [busy, setBusy] = useState(false);
   const [scanning, setScanning] = useState(false); // background reconcile in progress
   const [openMenu, setOpenMenu] = useState<string | null>(null);
@@ -290,6 +303,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   const [detail, setDetail] = useState<Describe | null>(null);
   const [selChange, setSelChange] = useState<string>("");   // highlighted History row (instant)
   const [detailBusy, setDetailBusy] = useState(false);      // right-panel files loading
+  const [histFile, setHistFile] = useState<OpenedFile | null>(null); // drilled-into submitted file (read-only preview)
   const [dragging, setDragging] = useState(false);
   const [ask, setAsk] = useState<null | { title: string; body: string; confirm: string; danger?: boolean; resolve: (v: boolean) => void }>(null);
   const [pending, setPending] = useState<Change[]>([]); // committed-but-not-pushed changelists
@@ -303,6 +317,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   const [buildOpen, setBuildOpen] = useState(false);
   const [buildMin, setBuildMin] = useState(false); // collapsed to a small floating chip
   const [buildPick, setBuildPick] = useState(false); // configuration picker before building
+  const [aiBusy, setAiBusy] = useState(false); // AI commit-summary generation in flight
   const [ctx, setCtx] = useState<null | { x: number; y: number; items: CtxItem[] }>(null); // right-click menu
   const [logs, setLogs] = useState<LogEntry[]>([]); // live p4 command log (P4V-style)
   const [logOpen, setLogOpen] = useState(false);
@@ -314,14 +329,17 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   // resizable panels (persisted): left panel width + Get-Latest zone width
   const [leftW, setLeftW] = useState<number>(() => { const v = Number(localStorage.getItem("exd-left-w")); return v >= 280 ? v : 380; });
   const [syncW, setSyncW] = useState<number>(() => { const v = Number(localStorage.getItem("exd-sync-w")); return v >= 150 ? v : 220; });
+  const [histW, setHistW] = useState<number>(() => { const v = Number(localStorage.getItem("exd-hist-w")); return v >= 240 ? v : 340; }); // History file-list column width
   useEffect(() => { try { localStorage.setItem("exd-left-w", String(Math.round(leftW))); } catch {} }, [leftW]);
   useEffect(() => { try { localStorage.setItem("exd-sync-w", String(Math.round(syncW))); } catch {} }, [syncW]);
+  useEffect(() => { try { localStorage.setItem("exd-hist-w", String(Math.round(histW))); } catch {} }, [histW]);
 
-  function startResize(e: ReactMouseEvent, kind: "left" | "sync") {
+  function startResize(e: ReactMouseEvent, kind: "left" | "sync" | "hist") {
     e.preventDefault();
-    const startX = e.clientX, startLeft = leftW, startSync = syncW;
+    const startX = e.clientX, startLeft = leftW, startSync = syncW, startHist = histW;
     const move = (ev: MouseEvent) => {
       if (kind === "left") setLeftW(Math.max(300, Math.min(startLeft + (ev.clientX - startX), window.innerWidth - 420)));
+      else if (kind === "hist") setHistW(Math.max(240, Math.min(startHist + (ev.clientX - startX), 620)));
       else setSyncW(Math.max(160, Math.min(startSync - (ev.clientX - startX), 520)));
     };
     const up = () => { document.removeEventListener("mousemove", move); document.removeEventListener("mouseup", up); document.body.classList.remove("resizing"); };
@@ -466,6 +484,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   async function openChange(c: Change) {
     const n = c.change || "";
     setSelChange(n);        // highlight the row immediately — no waiting for the load
+    setHistFile(null);      // leave any drilled-in file view
     setDetail(null);
     setDetailBusy(true);
     try { setDetail(await p4.describe(n)); }
@@ -513,6 +532,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   }
   function switchTab(t: Tab) {
     setTab(t);
+    setHistFile(null);
     if (t === "history" && history.length === 0) loadHistory();
   }
 
@@ -585,11 +605,27 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
     try {
       const cl = await p4.commit(message, list);
       flash(t("Committed locally · changelist {cl}. Press Submit at the top to send it to the server.", { cl }));
-      setDesc(""); setDescBody("");
+      // keep the draft — a local commit is not final; it clears only on Submit (see pushAll / submitOne)
       await refresh();
     } catch (e) { flash(String(e), true); setBusy(false); }
   }
 
+  // Ask the AI (OpenRouter) to draft a commit summary + description from the checked files.
+  async function genAiSummary() {
+    const picked = files.filter((f) => (f.change || "default") === "default" && checked.has(f.depotFile || ""));
+    if (!picked.length) { flash(t("Select some files first."), true); return; }
+    setAiBusy(true);
+    try {
+      const { summary, description } = await aiSummary(picked);
+      if (summary) setDesc(summary);
+      if (description) setDescBody(description);
+      flash(t("AI drafted a commit message — review & edit before committing."));
+    } catch (e) {
+      const msg = String(e);
+      flash(msg.includes("No OpenRouter API key") ? t("Set an OpenRouter API key in Settings → AI first.") : msg, true);
+    } finally { setAiBusy(false); }
+  }
+
   // Submit / push: send all committed (pending) changelists to the server. (like git push)
   async function pushAll() {
     if (!pending.length) return;
@@ -602,7 +638,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
       catch (e) { errors.push(`CL ${c.change}: ${String(e)}`); }
     }
     if (errors.length) flash(errors.join(" · "), true);
-    else flash(t("Sent to the server: {n} changelist(s).", { n }));
+    else { flash(t("Sent to the server: {n} changelist(s).", { n })); setDesc(""); setDescBody(""); } // draft done → clear on successful Submit
     await refresh();
     await loadHistory(); // the submit created a new submitted changelist — refresh History
   }
@@ -611,7 +647,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
   async function submitOne(change: string) {
     if (!(await confirm({ title: t("Submit changelist #{n}?", { n: change }), body: t("This changelist goes to the Perforce server and becomes available to the team. This is a push — it cannot be undone."), confirm: t("Submit") }))) return;
     setBusy(true);
-    try { await p4.submitChange(change); flash(t("Submitted changelist #{n}.", { n: change })); await refresh(); await loadHistory(); }
+    try { await p4.submitChange(change); flash(t("Submitted changelist #{n}.", { n: change })); setDesc(""); setDescBody(""); await refresh(); await loadHistory(); } // draft clears on successful Submit
     catch (e) { flash(String(e), true); setBusy(false); }
   }
   // Uncommit: move a changelist's files back into the working set (default)
@@ -723,7 +759,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
     Connection: [{ label: t("Refresh"), kb: "F5", act: () => refresh() }, { label: t("Choose working folder…"), act: () => browseTo("") }],
     Actions: [{ label: t("Rescan changes"), kb: "Ctrl+R", act: rescan }, { label: t("Get Latest"), kb: "Ctrl+G", act: getLatest }, { label: t("Commit (local)"), act: doCommit }, { label: t("Submit to server"), kb: "Ctrl+S", act: pushAll }, { label: t("Revert All…"), act: revertAll }, { label: t("Refresh"), kb: "F5", act: () => refresh() }],
     Window: [{ label: (logOpen ? "✓ " : "") + t("Log"), kb: "Ctrl+L", act: () => setLogOpen((o) => !o) }],
-    Tools: [{ label: slnPath ? t("Build Solution (.sln)") : t("Build Solution — no .sln"), kb: "Ctrl+B", act: startBuild }, { label: t("Settings…"), act: () => setModal({ kind: "settings" }) }],
+    Tools: [{ label: slnPath ? t("Build Solution (.sln)") : t("Build Solution — no .sln"), kb: "Ctrl+B", act: startBuild }, { label: t("People & Roles…"), act: () => setModal({ kind: "users" }) }, { label: t("Settings…"), act: () => setModal({ kind: "settings" }) }],
     Help: [{ label: t("About"), act: () => setModal({ kind: "about" }) }],
   };
 
@@ -746,6 +782,7 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
           ))}
         </div>
         <div className="conn-pill"><span className="dot" />{info?.serverAddress || "connected"}</div>
+        <button className="theme-btn" onClick={() => setModal({ kind: "users" })} title={t("People & Roles — who works on this depot")}>{I.people}</button>
         <button className="theme-btn" onClick={toggleTheme} title={t("Theme")}>{light ? I.sun : I.moon}</button>
         <WinControls />
       </div>
@@ -871,8 +908,14 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
                 <FileList files={view} sel={sel} selRows={selRows} checked={checked} onRowClick={rowClick} onToggle={toggleCheck} onContext={fileCtx} />
               )}
               <div className="commit">
-                <input className="summary" placeholder={t("Summary: what changed…")} value={desc} onChange={(e) => setDesc(e.target.value)}
-                  onKeyDown={(e) => { if (e.key === "Enter" && (e.ctrlKey || e.metaKey)) doCommit(); }} />
+                <div className="summrow">
+                  <input className="summary" placeholder={t("Summary: what changed…")} value={desc} onChange={(e) => setDesc(e.target.value)}
+                    onKeyDown={(e) => { if (e.key === "Enter" && (e.ctrlKey || e.metaKey)) doCommit(); }} />
+                  <button className={"aibtn icon" + (aiBusy ? " busy" : "")} disabled={aiBusy || checked.size === 0} onClick={genAiSummary}
+                    title={t("Draft a commit message with AI from the selected files")}>
+                    {aiBusy ? <span className="ldr sm" /> : I.spark}
+                  </button>
+                </div>
                 <textarea className="desc" placeholder={t("Description (optional)…")} value={descBody} onChange={(e) => setDescBody(e.target.value)}
                   onKeyDown={(e) => { if (e.key === "Enter" && (e.ctrlKey || e.metaKey)) doCommit(); }} />
                 <button className="submit" disabled={busy || !desc.trim() || checked.size === 0} onClick={doCommit}>
@@ -892,9 +935,26 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
           )}
         </div>
 
-        {tab === "changes"
-          ? <Preview file={selFile} onRevert={doRevert} onFlash={flash} />
-          : <ChangeDetail detail={detail} busy={detailBusy} />}
+        {tab === "changes" ? (
+          <Preview file={selFile} onRevert={doRevert} onFlash={flash} />
+        ) : (
+          <div className={"histsplit" + (histFile ? "" : " solo")} style={{ "--hist-w": `${histW}px` } as CSSProperties}>
+            <ChangeDetail detail={detail} busy={detailBusy} onOpen={setHistFile} selected={histFile?._spec || ""} split />
+            {histFile && (<>
+              <div className="vhandle histh" title={t("Drag to resize")}
+                onPointerDown={(e) => {
+                  e.preventDefault();
+                  const el = e.currentTarget; el.setPointerCapture(e.pointerId);
+                  const startX = e.clientX, start = histW;
+                  document.body.classList.add("resizing");
+                  const move = (ev: PointerEvent) => setHistW(Math.max(240, Math.min(start + (ev.clientX - startX), 620)));
+                  const up = () => { el.releasePointerCapture(e.pointerId); el.removeEventListener("pointermove", move); el.removeEventListener("pointerup", up); document.body.classList.remove("resizing"); };
+                  el.addEventListener("pointermove", move); el.addEventListener("pointerup", up);
+                }} />
+              <Preview file={histFile} onRevert={doRevert} onFlash={flash} />
+            </>)}
+          </div>
+        )}
       </div>
 
       {logOpen && <LogPanel logs={logs} onClose={() => setLogOpen(false)} onClear={() => setLogs([])} />}
@@ -922,8 +982,9 @@ function Workbench({ info, session, light, toggleTheme, lang, setLang, zoom, set
           </div>
         </div>
       )}
-      {modal && <AppModal modal={modal} info={info} light={light} toggleTheme={toggleTheme} lang={lang} setLang={setLang} zoom={zoom} setZoom={setZoom}
+      {modal && modal.kind !== "users" && <AppModal modal={modal} info={info} light={light} toggleTheme={toggleTheme} lang={lang} setLang={setLang} zoom={zoom} setZoom={setZoom}
         onClose={() => setModal(null)} onPickWorkspace={switchWorkspace} onBrowse={browseTo} onChoose={chooseScope} onDisconnect={onDisconnect} />}
+      {modal?.kind === "users" && <UsersRoles me={info?.userName || ""} onClose={() => setModal(null)} onFlash={flash} />}
       {ask && <ConfirmModal {...ask} onClose={(v) => { ask.resolve(v); setAsk(null); }} />}
       {prompt && <TextPrompt title={prompt.title} label={prompt.label} value={prompt.value} onSave={prompt.onSave} onClose={() => setPrompt(null)} />}
       {showXfer && transfer && <TransferDialog transfer={transfer} />}
@@ -1026,6 +1087,7 @@ function AppModal({ modal, info, light, toggleTheme, lang, setLang, zoom, setZoo
             <div className="info-row"><span className="rk">{t("User")}</span><span className="rv">{info?.userName || "—"}</span></div>
             <div className="info-row"><span className="rk">{t("Workspace")}</span><span className="rv">{info?.clientName || "—"}</span></div>
             <div className="info-row"><span className="rk">{t("Server version")}</span><span className="rv">{(info?.serverVersion as string || "").split("/")[2] || "—"}</span></div>
+            <AiSettings />
             <div style={{ marginTop: 18 }}><button className="mbtn danger" style={{ width: "100%" }} onClick={() => { onClose(); onDisconnect(); }}>{t("Disconnect")}</button></div>
           </div>
         </>)}
@@ -1045,6 +1107,155 @@ function AppModal({ modal, info, light, toggleTheme, lang, setLang, zoom, setZoo
   );
 }
 
+/* ---------------- avatar (initials, deterministic color, activity dot) ---------------- */
+function Avatar({ user, name, size = 30, act }: { user: string; name?: string; size?: number; act?: "active" | "recent" | "idle" }) {
+  return (
+    <span className="avatar" style={{ width: size, height: size, fontSize: Math.round(size * 0.38), background: avatarColor(user || name || "?") }} title={name ? `${name} (${user})` : user}>
+      {initials(name || "", user)}
+      {act && <span className={"adot " + act} />}
+    </span>
+  );
+}
+
+/* ---------------- AI settings block (inside Settings modal) — localStorage-backed ---------------- */
+function AiSettings() {
+  const [key, setKey] = useState(getKeyLocal());
+  const [model, setModelVal] = useState(getModel());
+  const [show, setShow] = useState(false);
+  return (
+    <div className="ai-set">
+      <div className="ai-set-h">{I.spark}<span>{t("AI commit messages")}</span></div>
+      <div className="info-row"><span className="rk">{t("OpenRouter key")}</span>
+        <span className="keyfield">
+          <input type={show ? "text" : "password"} className="kf-in" placeholder="sk-or-…" value={key}
+            onChange={(e) => { setKey(e.target.value); setKeyLocal(e.target.value); }} />
+          <button className="kf-eye" onClick={() => setShow((s) => !s)} title={show ? t("Hide") : t("Show")}>{show ? "🙈" : "👁"}</button>
+        </span>
+      </div>
+      <div className="info-row"><span className="rk">{t("Model")}</span>
+        <input className="kf-in mono" value={model} placeholder="google/gemini-2.0-flash-001"
+          onChange={(e) => { setModelVal(e.target.value); setModel(e.target.value); }} />
+      </div>
+      <div className="ai-hint">{t("Stored only on this machine. Get a key at openrouter.ai — a “:free” model costs nothing.")}</div>
+    </div>
+  );
+}
+
+/* ---------------- People & Roles: who works on the depot + group/permission assignment ---------------- */
+function UsersRoles({ me, onClose, onFlash }: { me: string; onClose: () => void; onFlash: (text: string, err?: boolean) => void }) {
+  const [users, setUsers] = useState<User[]>([]);
+  const [groups, setGroups] = useState<string[]>([]);
+  const [busy, setBusy] = useState(true);
+  const [err, setErr] = useState("");
+  const [sel, setSel] = useState("");              // selected user id
+  const [myGroups, setMyGroups] = useState<string[]>([]); // groups of the selected user
+  const [gBusy, setGBusy] = useState(false);
+  const [q, setQ] = useState("");
+
+  useEffect(() => {
+    let live = true;
+    (async () => {
+      try {
+        const [us, gs] = await Promise.all([p4.users(), p4.groups()]);
+        if (!live) return;
+        setUsers(us);
+        setGroups(gs.map((g) => g.group || "").filter(Boolean));
+      } catch (e) { if (live) setErr(String(e)); }
+      finally { if (live) setBusy(false); }
+    })();
+    return () => { live = false; };
+  }, []);
+  useEffect(() => {
+    const onKey = (e: KeyboardEvent) => e.key === "Escape" && onClose();
+    document.addEventListener("keydown", onKey);
+    return () => document.removeEventListener("keydown", onKey);
+  }, [onClose]);
+
+  async function selectUser(u: string) {
+    setSel(u); setMyGroups([]); setGBusy(true);
+    try { const g = await p4.groups(u); setMyGroups(g.map((x) => x.group || "").filter(Boolean)); }
+    catch (e) { onFlash(String(e), true); }
+    finally { setGBusy(false); }
+  }
+  async function toggleGroup(group: string) {
+    if (!sel) return;
+    const isMember = myGroups.includes(group);
+    setGBusy(true);
+    try {
+      await p4.groupMember(group, sel, !isMember);
+      setMyGroups((cur) => isMember ? cur.filter((x) => x !== group) : [...cur, group]);
+      onFlash(isMember ? t("Removed {u} from “{g}”.", { u: sel, g: group }) : t("Added {u} to “{g}”.", { u: sel, g: group }));
+    } catch (e) {
+      const msg = String(e);
+      onFlash(/permission|protect|admin|super|not allowed/i.test(msg) ? t("You need admin rights on the server to change roles.") : msg, true);
+    } finally { setGBusy(false); }
+  }
+
+  const s = q.trim().toLowerCase();
+  const filtered = users.filter((u) => !s || (u.User || "").toLowerCase().includes(s) || (u.FullName || "").toLowerCase().includes(s) || (u.Email || "").toLowerCase().includes(s));
+  const selUser = users.find((u) => u.User === sel);
+  const X = <button className="x" onClick={onClose}><svg viewBox="0 0 24 24" width="14" height="14" fill="none"><path d="M6 6l12 12M18 6L6 18" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" /></svg></button>;
+
+  return (
+    <div className="modal-back" onClick={onClose}>
+      <div className="picker wide" onClick={(e) => e.stopPropagation()}>
+        <div className="picker-head">{I.people}<h3>{t("People & Roles")}</h3>
+          <span className="ph-sub">{t("{n} on this depot", { n: users.length })}</span>{X}</div>
+        {err ? <div className="viewer-msg err" style={{ position: "static", padding: 24 }}>{err}</div>
+          : busy ? <div className="viewer-msg" style={{ position: "static", padding: 28 }}><span className="ldr" />{t("Loading users…")}</div>
+          : (
+          <div className="ur-body">
+            <div className="ur-list">
+              <div className="ur-filter">{I.search}<input placeholder={t("Filter people…")} value={q} onChange={(e) => setQ(e.target.value)} /></div>
+              <div className="ur-scroll">
+                {filtered.map((u) => {
+                  const act = activity(u.Access);
+                  return (
+                    <div key={u.User} className={"ur-row" + (sel === u.User ? " on" : "")} onClick={() => selectUser(u.User || "")}>
+                      <Avatar user={u.User || ""} name={u.FullName} act={act} />
+                      <span className="ur-meta">
+                        <span className="ur-name">{u.FullName || u.User}{u.User === me && <span className="ur-you">{t("you")}</span>}</span>
+                        <span className="ur-sub">{u.Email || u.User}</span>
+                      </span>
+                      <span className={"ur-actd " + act} title={act} />
+                    </div>
+                  );
+                })}
+                {filtered.length === 0 && <div className="ur-empty">{t("No matches.")}</div>}
+              </div>
+            </div>
+            <div className="ur-detail">
+              {!selUser ? <div className="viewer-msg" style={{ position: "static", padding: 28, flexDirection: "column" }}>{I.people}<span>{t("Pick a person to see and edit their roles.")}</span></div>
+              : (<>
+                <div className="ur-dhead">
+                  <Avatar user={selUser.User || ""} name={selUser.FullName} size={46} act={activity(selUser.Access)} />
+                  <div className="ur-dinfo">
+                    <div className="ur-dname">{selUser.FullName || selUser.User}</div>
+                    <div className="ur-dsub">{selUser.Email || "—"}{selUser.Access ? " · " + t("active {t}", { t: fmtTime(selUser.Access) }) : ""}</div>
+                  </div>
+                </div>
+                <div className="ur-grouphd"><span>{t("Roles / groups")}</span>{gBusy && <span className="ldr sm" />}</div>
+                <div className="ur-groups">
+                  {groups.length === 0 && <div className="ur-empty">{t("No groups defined on the server.")}</div>}
+                  {groups.map((g) => {
+                    const on = myGroups.includes(g);
+                    return (
+                      <button key={g} className={"ur-chip" + (on ? " on" : "")} disabled={gBusy} onClick={() => toggleGroup(g)}>
+                        <span className="urc-box">{on ? I.check : null}</span>{g}
+                      </button>
+                    );
+                  })}
+                </div>
+                <div className="ai-hint">{t("Toggling a group grants or revokes that role. Requires admin rights on the server.")}</div>
+              </>)}
+            </div>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
 /* ---------------- right-click context menu ---------------- */
 function ContextMenu({ x, y, items, onClose }: { x: number; y: number; items: CtxItem[]; onClose: () => void }) {
   useEffect(() => {
@@ -1258,7 +1469,7 @@ function ConfirmModal({ title, body, confirm, danger, onClose }: { title: string
 
 /* ---------------- change detail (History right panel) — virtualized ---------------- */
 const CROW = 52;
-function ChangeDetail({ detail, busy }: { detail: Describe | null; busy?: boolean }) {
+function ChangeDetail({ detail, busy, onOpen, selected, split }: { detail: Describe | null; busy?: boolean; onOpen?: (f: OpenedFile) => void; selected?: string; split?: boolean }) {
   const ref = useRef<HTMLDivElement>(null);
   const [scroll, setScroll] = useState(0);
   const [h, setH] = useState(500);
@@ -1274,8 +1485,9 @@ function ChangeDetail({ detail, busy }: { detail: Describe | null; busy?: boolea
   // jump back to top whenever a different changelist loads
   useEffect(() => { if (ref.current) ref.current.scrollTop = 0; setScroll(0); }, [detail?.change]);
 
-  if (busy) return <div className="right"><div className="nofile"><span className="ldr" /><span>{t("Loading file list…")}</span></div></div>;
-  if (!detail) return <div className="right"><div className="nofile">{I.clock}<span>{t("Select a changelist in History")}</span></div></div>;
+  const cls = "right" + (split ? " histlist" : "");
+  if (busy) return <div className={cls}><div className="nofile"><span className="ldr" /><span>{t("Loading file list…")}</span></div></div>;
+  if (!detail) return <div className={cls}><div className="nofile">{I.clock}<span>{t("Select a changelist in History")}</span></div></div>;
 
   const first = Math.max(0, Math.floor(scroll / CROW) - 6);
   const last = Math.min(fileRows.length, Math.ceil((scroll + h) / CROW) + 6);
@@ -1284,10 +1496,13 @@ function ChangeDetail({ detail, busy }: { detail: Describe | null; busy?: boolea
     const f = fileRows[i];
     const { name, dir } = splitPath(f.depotFile);
     const st = statusOf(f.action);
+    const key = `${f.depotFile}#${f.rev}`;
     rows.push(
-      <div key={i} className="crow" style={{ top: i * CROW }}>
+      <div key={i} className={"crow click" + (selected === key ? " sel" : "")} style={{ top: i * CROW }}
+        onClick={() => onOpen?.({ depotFile: f.depotFile, action: f.action, rev: f.rev, type: "", change: detail.change, _spec: key })}>
         <span className={"stat " + st.cls}>{st.ch}</span>
         <span className="hbody"><span className="hdesc" style={{ WebkitLineClamp: 1 }}>{name}</span><span className="hmeta">{dir}#{f.rev}</span></span>
+        <span className="crow-go">{I.chevron}</span>
       </div>
     );
   }
@@ -1313,10 +1528,10 @@ function HistoryList({ history, busy, sel, onSelect, onContext }: { history: Cha
     <div className="files" style={{ position: "relative" }}>
       {history.map((c) => (
         <div key={c.change} className={"hrow click" + (sel === c.change ? " sel" : "")} onClick={() => onSelect(c)} onContextMenu={(e) => onContext?.(c, e)}>
-          <span className="hnum">#{c.change}</span>
+          <Avatar user={c.user || "?"} size={26} />
           <span className="hbody">
             <span className="hdesc">{(c.desc || "").trim() || t("(no description)")}</span>
-            <span className="hmeta">{c.user} · {fmtTime(c.time)}</span>
+            <span className="hmeta">#{c.change} · {c.user} · {fmtTime(c.time)}</span>
           </span>
         </div>
       ))}
@@ -1396,10 +1611,13 @@ function FileList({ files, sel, selRows, checked, onRowClick, onToggle, onContex
 function Preview({ file, onRevert, onFlash }: { file?: OpenedFile; onRevert: (f: OpenedFile) => void; onFlash: (text: string, err?: boolean) => void }) {
   if (!file) return <div className="right"><div className="nofile">{I.cube}<span>{t("Select a file on the left")}</span></div></div>;
   const dp = file.depotFile || "";
+  const spec = file._spec || "";      // set → read-only view of a submitted revision
+  const hist = !!spec;
   const { name, dir } = splitPath(dp);
   const st = statusOf(file.action);
   const kind = kindOf(name);
-  const rev = file.rev ? `#${file.haveRev || "?"} → #${file.rev}` : "#" + (file.rev || "?");
+  const rev = hist ? "#" + (file.rev || "?")
+    : file.rev ? `#${file.haveRev || "?"} → #${file.rev}` : "#" + (file.rev || "?");
 
   return (
     <div className="right">
@@ -1407,20 +1625,20 @@ function Preview({ file, onRevert, onFlash }: { file?: OpenedFile; onRevert: (f:
         <span className={"stat " + st.cls} style={{ width: 26, height: 26, fontSize: 13 }}>{st.ch}</span>
         <span className="ttl">
           <span className="n">{name} <span>— {dir}</span></span>
-          <span className="m">{file.action} · <span className="rev">{rev}</span> · {file.type}</span>
+          <span className="m">{file.action} · <span className="rev">{rev}</span>{file.type ? " · " + file.type : ""}{hist && file.change ? " · " + t("in #{n}", { n: file.change }) : ""}</span>
         </span>
         <span className="tools">
-          {kind === "code" && (
+          {kind === "code" && !hist && (
             <span className="gbtn vsc" onClick={async () => { try { await p4.openInVscode(dp); onFlash(t("Opening in VS Code…")); } catch (e) { onFlash(String(e), true); } }}>
               {I.vscode}{t("Edit in VS Code")}
             </span>
           )}
-          <span className="gbtn" onClick={() => onRevert(file)}>{I.revert}{t("Revert")}</span>
+          {!hist && <span className="gbtn" onClick={() => onRevert(file)}>{I.revert}{t("Revert")}</span>}
         </span>
       </div>
 
-      {kind === "model" ? <ModelViewer depot={dp} name={name} />
-        : kind === "image" ? <ImageViewer depot={dp} name={name} />
+      {kind === "model" ? <ModelViewer depot={dp} name={name} spec={spec || undefined} />
+        : kind === "image" ? <ImageViewer depot={dp} name={name} spec={spec || undefined} />
           : kind === "uasset" ? <UassetPreview file={file} />
             : <CodeView file={file} />}
     </div>
@@ -1431,13 +1649,13 @@ function Mi({ k, v, acc }: { k: string; v: string; acc?: boolean }) {
 }
 
 /* ---------------- real image viewer ---------------- */
-function ImageViewer({ depot, name }: { depot: string; name: string }) {
+function ImageViewer({ depot, name, spec }: { depot: string; name: string; spec?: string }) {
   const [url, setUrl] = useState<string | null>(null);
   const [err, setErr] = useState("");
   const [dim, setDim] = useState("");
   useEffect(() => {
     let u = ""; let live = true;
-    p4.readDepot(depot).then((buf) => {
+    (spec ? p4.printDepot(spec) : p4.readDepot(depot)).then((buf) => {
       if (!live) return;
       const ext = (name.split(".").pop() || "png").toLowerCase();
       const mime = ext === "svg" ? "image/svg+xml" : ext === "jpg" ? "image/jpeg" : `image/${ext}`;
@@ -1445,7 +1663,7 @@ function ImageViewer({ depot, name }: { depot: string; name: string }) {
       setUrl(u);
     }).catch((e) => live && setErr(String(e)));
     return () => { live = false; if (u) URL.revokeObjectURL(u); };
-  }, [depot, name]);
+  }, [depot, name, spec]);
   return (
     <div className="asset">
       <div className="stage">
@@ -1471,14 +1689,14 @@ function UassetPreview({ file }: { file: OpenedFile }) {
   useEffect(() => {
     let live = true; let url = "";
     setThumb(null); setTried(false);
-    p4.readDepot(dp).then((buf) => {
+    fileBytes(file).then((buf) => {
       if (!live) return;
       const png = extractPng(new Uint8Array(buf));
       if (png) { url = URL.createObjectURL(new Blob([png], { type: "image/png" })); setThumb(url); }
       setTried(true);
     }).catch(() => live && setTried(true));
     return () => { live = false; if (url) URL.revokeObjectURL(url); };
-  }, [dp]);
+  }, [dp, file._spec]);
 
   return (
     <div className="asset">
diff --git a/src/CodeView.tsx b/src/CodeView.tsx
index ae17528..d6359c5 100644
--- a/src/CodeView.tsx
+++ b/src/CodeView.tsx
@@ -48,6 +48,7 @@ const MAX = 800_000; // don't try to render/highlight enormous files
 // for new files, or a colored unified diff for edits.
 export default function CodeView({ file }: { file: OpenedFile }) {
   const dp = file.depotFile || "";
+  const spec = file._spec || ""; // set → read this exact submitted revision
   const { name } = splitPath(dp);
   const action = (file.action || "").toLowerCase();
   const [diff, setDiff] = useState<string | null>(null);
@@ -58,9 +59,11 @@ export default function CodeView({ file }: { file: OpenedFile }) {
   useEffect(() => {
     let live = true;
     setDiff(null); setCode(null); setErr(""); setTooBig(false);
-    // edits show a diff; adds have none, so fetch it but don't depend on it
-    p4.diff(dp).then((d) => live && setDiff(d)).catch(() => live && setDiff(""));
-    p4.readDepot(dp).then((buf) => {
+    // working-copy edits show a diff against the depot; historical revisions just
+    // show their full content (no meaningful working diff to fetch).
+    if (!spec) p4.diff(dp).then((d) => live && setDiff(d)).catch(() => live && setDiff(""));
+    const load = spec ? p4.printDepot(spec) : p4.readDepot(dp);
+    load.then((buf) => {
       if (!live) return;
       if (buf.byteLength > MAX) { setTooBig(true); setCode(""); return; }
       const bytes = new Uint8Array(buf);
@@ -69,7 +72,7 @@ export default function CodeView({ file }: { file: OpenedFile }) {
       setCode(new TextDecoder("utf-8", { fatal: false }).decode(bytes));
     }).catch((e) => live && setErr(String(e)));
     return () => { live = false; };
-  }, [dp]);
+  }, [dp, spec]);
 
   const lang = langOf(name);
   const highlighted = useMemo(() => {
diff --git a/src/ModelViewer.tsx b/src/ModelViewer.tsx
index 6a49815..1eb01ec 100644
--- a/src/ModelViewer.tsx
+++ b/src/ModelViewer.tsx
@@ -14,7 +14,7 @@ import { t } from "./i18n";
 
 type Api = { toggleWire: (b: boolean) => void; toggleGrid: (b: boolean) => void; reset: () => void };
 
-export default function ModelViewer({ depot, name }: { depot: string; name: string }) {
+export default function ModelViewer({ depot, name, spec }: { depot: string; name: string; spec?: string }) {
   const mount = useRef<HTMLDivElement>(null);
   const api = useRef<Api | null>(null);
   const [status, setStatus] = useState<"loading" | "ok" | "error">("loading");
@@ -138,7 +138,7 @@ export default function ModelViewer({ depot, name }: { depot: string; name: stri
 
     (async () => {
       try {
-        const buf = await p4.readDepot(depot);
+        const buf = spec ? await p4.printDepot(spec) : await p4.readDepot(depot);
         if (disposed) return;
         const manager = new THREE.LoadingManager();
         if (ext === "glb" || ext === "gltf") new GLTFLoader(manager).parse(buf, "", (g) => !disposed && place(g.scene), fail);
@@ -173,7 +173,7 @@ export default function ModelViewer({ depot, name }: { depot: string; name: stri
       api.current = null;
     };
     // eslint-disable-next-line
-  }, [depot, name]);
+  }, [depot, name, spec]);
 
   const fmt = (n: number) => n.toLocaleString("ru");
   return (
diff --git a/src/ai.ts b/src/ai.ts
new file mode 100644
index 0000000..0bece3f
--- /dev/null
+++ b/src/ai.ts
@@ -0,0 +1,74 @@
+// OpenRouter-powered commit summary + small avatar helpers.
+import { p4, OpenedFile, statusOf } from "./p4";
+
+const MODEL_KEY = "exd-ai-model";
+const KEY_KEY = "exd-ai-key";
+// cheap + reliable default; change to a "…:free" model in Settings to pay nothing
+export const DEFAULT_MODEL = "openai/gpt-4o-mini";
+
+export function getModel(): string { try { return localStorage.getItem(MODEL_KEY) || DEFAULT_MODEL; } catch { return DEFAULT_MODEL; } }
+export function setModel(m: string) { try { localStorage.setItem(MODEL_KEY, m.trim() || DEFAULT_MODEL); } catch {} }
+export function getKeyLocal(): string { try { return localStorage.getItem(KEY_KEY) || ""; } catch { return ""; } }
+export function setKeyLocal(k: string) { try { localStorage.setItem(KEY_KEY, k.trim()); } catch {} }
+
+// key resolution: localStorage first, else the app-config file (git-ignored)
+export async function resolveKey(): Promise<string> {
+  const local = getKeyLocal();
+  if (local) return local;
+  try { return (await p4.readAiKey()) || ""; } catch { return ""; }
+}
+
+// generate a commit summary + description from the changed files
+export async function aiSummary(files: OpenedFile[]): Promise<{ summary: string; description: string }> {
+  const key = await resolveKey();
+  if (!key) throw new Error("No OpenRouter API key — set it in Settings");
+  const list = files.slice(0, 200).map((f) => `${statusOf(f.action).ch} ${f.depotFile || ""}`).join("\n");
+  const res = await fetch("https://openrouter.ai/api/v1/chat/completions", {
+    method: "POST",
+    headers: { Authorization: `Bearer ${key}`, "Content-Type": "application/json", "X-Title": "Exbyte Depot" },
+    body: JSON.stringify({
+      model: getModel(),
+      max_tokens: 300,
+      temperature: 0.3,
+      messages: [
+        { role: "system", content: "You write concise commit messages for a Perforce/Unreal project. Given a list of changed files (+ added, ± edited, − deleted), reply with ONE short imperative summary line (under 72 chars, no trailing period), then a blank line, then an optional 1-3 line description. Plain text only — no markdown, no code fences, no quotes." },
+        { role: "user", content: `Changed files:\n${list}` },
+      ],
+    }),
+  });
+  if (!res.ok) {
+    const txt = await res.text().catch(() => "");
+    throw new Error(`OpenRouter ${res.status}: ${txt.slice(0, 180)}`);
+  }
+  const data = await res.json();
+  const content: string = (data?.choices?.[0]?.message?.content || "").trim();
+  if (!content) throw new Error("Empty AI response");
+  const lines = content.split("\n");
+  const summary = (lines[0] || "").replace(/^["'`*]+|["'`*]+$/g, "").trim();
+  const description = lines.slice(1).join("\n").trim();
+  return { summary, description };
+}
+
+// --- avatar helpers ---
+export function initials(name: string, user: string): string {
+  const n = (name || "").trim();
+  if (n) {
+    const p = n.split(/\s+/);
+    return (p[0][0] + (p[1]?.[0] || "")).toUpperCase();
+  }
+  return (user || "?").slice(0, 2).toUpperCase();
+}
+export function avatarColor(seed: string): string {
+  let h = 0;
+  for (let i = 0; i < seed.length; i++) h = (h * 31 + seed.charCodeAt(i)) >>> 0;
+  return `hsl(${h % 360} 52% 52%)`;
+}
+// activity level from a unix-epoch last-access string
+export function activity(access?: string): "active" | "recent" | "idle" {
+  const n = Number(access || 0) * 1000;
+  if (!n) return "idle";
+  const ago = Date.now() - n;
+  if (ago < 60 * 60 * 1000) return "active";        // < 1h
+  if (ago < 24 * 60 * 60 * 1000) return "recent";   // < 1d
+  return "idle";
+}
diff --git a/src/i18n.ts b/src/i18n.ts
index 485ccb2..1435d44 100644
--- a/src/i18n.ts
+++ b/src/i18n.ts
@@ -74,6 +74,33 @@ const D: Record<string, Tr> = {
   "Build Solution — no .sln": { ru: "Собрать решение — нет .sln", de: "Projektmappe bauen — keine .sln", fr: "Compiler — aucune .sln", es: "Compilar — sin .sln" },
   "No .sln found in the working folder. Choose the project folder first.": { ru: "В рабочей папке нет .sln. Сначала выбери папку проекта.", de: "Keine .sln im Arbeitsordner. Wähle zuerst den Projektordner.", fr: "Aucune .sln dans le dossier de travail. Choisissez d’abord le dossier du projet.", es: "No hay .sln en la carpeta de trabajo. Elige primero la carpeta del proyecto." },
   "Build": { ru: "Сборка", de: "Build", fr: "Compilation", es: "Compilación" },
+  "AI": { ru: "ИИ", de: "KI", fr: "IA", es: "IA" },
+  "AI commit messages": { ru: "ИИ-сообщения коммитов", de: "KI-Commit-Nachrichten", fr: "Messages de commit IA", es: "Mensajes de commit con IA" },
+  "Draft a commit message with AI from the selected files": { ru: "Сгенерировать сообщение коммита из выбранных файлов через ИИ", de: "Commit-Nachricht per KI aus den gewählten Dateien entwerfen", fr: "Rédiger un message de commit par IA à partir des fichiers sélectionnés", es: "Redactar un mensaje de commit con IA a partir de los archivos seleccionados" },
+  "Select some files first.": { ru: "Сначала выбери файлы.", de: "Wähle zuerst Dateien aus.", fr: "Sélectionnez d’abord des fichiers.", es: "Selecciona primero algunos archivos." },
+  "AI drafted a commit message — review & edit before committing.": { ru: "ИИ подготовил сообщение — проверь и поправь перед коммитом.", de: "KI hat eine Nachricht entworfen — vor dem Commit prüfen und anpassen.", fr: "L’IA a rédigé un message — vérifiez et modifiez avant de valider.", es: "La IA redactó un mensaje — revísalo y edítalo antes de confirmar." },
+  "Set an OpenRouter API key in Settings → AI first.": { ru: "Сначала укажи ключ OpenRouter в Настройках → ИИ.", de: "Zuerst einen OpenRouter-API-Schlüssel unter Einstellungen → KI eintragen.", fr: "Renseignez d’abord une clé API OpenRouter dans Paramètres → IA.", es: "Primero configura una clave API de OpenRouter en Ajustes → IA." },
+  "OpenRouter key": { ru: "Ключ OpenRouter", de: "OpenRouter-Schlüssel", fr: "Clé OpenRouter", es: "Clave OpenRouter" },
+  "Model": { ru: "Модель", de: "Modell", fr: "Modèle", es: "Modelo" },
+  "Hide": { ru: "Скрыть", de: "Verbergen", fr: "Masquer", es: "Ocultar" },
+  "Show": { ru: "Показать", de: "Anzeigen", fr: "Afficher", es: "Mostrar" },
+  "Stored only on this machine. Get a key at openrouter.ai — a “:free” model costs nothing.": { ru: "Хранится только на этом компьютере. Получи ключ на openrouter.ai — модель с «:free» бесплатна.", de: "Nur auf diesem Gerät gespeichert. Schlüssel auf openrouter.ai holen — ein „:free“-Modell kostet nichts.", fr: "Stocké uniquement sur cette machine. Obtenez une clé sur openrouter.ai — un modèle « :free » est gratuit.", es: "Se guarda solo en este equipo. Consigue una clave en openrouter.ai — un modelo « :free » no cuesta nada." },
+  "People & Roles…": { ru: "Пользователи и роли…", de: "Personen & Rollen…", fr: "Personnes et rôles…", es: "Personas y roles…" },
+  "People & Roles": { ru: "Пользователи и роли", de: "Personen & Rollen", fr: "Personnes et rôles", es: "Personas y roles" },
+  "People & Roles — who works on this depot": { ru: "Пользователи и роли — кто работает над депотом", de: "Personen & Rollen — wer an diesem Depot arbeitet", fr: "Personnes et rôles — qui travaille sur ce dépôt", es: "Personas y roles — quién trabaja en este depósito" },
+  "{n} on this depot": { ru: "{n} в депоте", de: "{n} in diesem Depot", fr: "{n} sur ce dépôt", es: "{n} en este depósito" },
+  "Loading users…": { ru: "Загрузка пользователей…", de: "Benutzer werden geladen…", fr: "Chargement des utilisateurs…", es: "Cargando usuarios…" },
+  "Filter people…": { ru: "Фильтр по людям…", de: "Personen filtern…", fr: "Filtrer les personnes…", es: "Filtrar personas…" },
+  "you": { ru: "вы", de: "Sie", fr: "vous", es: "tú" },
+  "No matches.": { ru: "Нет совпадений.", de: "Keine Treffer.", fr: "Aucun résultat.", es: "Sin coincidencias." },
+  "Pick a person to see and edit their roles.": { ru: "Выбери человека, чтобы увидеть и изменить его роли.", de: "Wähle eine Person, um ihre Rollen zu sehen und zu bearbeiten.", fr: "Choisissez une personne pour voir et modifier ses rôles.", es: "Elige a una persona para ver y editar sus roles." },
+  "active {t}": { ru: "активность {t}", de: "aktiv {t}", fr: "actif {t}", es: "activo {t}" },
+  "Roles / groups": { ru: "Роли / группы", de: "Rollen / Gruppen", fr: "Rôles / groupes", es: "Roles / grupos" },
+  "No groups defined on the server.": { ru: "На сервере нет групп.", de: "Auf dem Server sind keine Gruppen definiert.", fr: "Aucun groupe défini sur le serveur.", es: "No hay grupos definidos en el servidor." },
+  "Toggling a group grants or revokes that role. Requires admin rights on the server.": { ru: "Переключение группы выдаёт или отзывает роль. Нужны права администратора на сервере.", de: "Das Umschalten einer Gruppe erteilt oder entzieht die Rolle. Erfordert Admin-Rechte auf dem Server.", fr: "Activer/désactiver un groupe accorde ou retire ce rôle. Nécessite des droits admin sur le serveur.", es: "Activar o desactivar un grupo concede o revoca ese rol. Requiere permisos de administrador en el servidor." },
+  "You need admin rights on the server to change roles.": { ru: "Чтобы менять роли, нужны права администратора на сервере.", de: "Zum Ändern von Rollen sind Admin-Rechte auf dem Server nötig.", fr: "Vous avez besoin de droits admin sur le serveur pour changer les rôles.", es: "Necesitas permisos de administrador en el servidor para cambiar roles." },
+  "Added {u} to “{g}”.": { ru: "{u} добавлен в «{g}».", de: "{u} zu „{g}“ hinzugefügt.", fr: "{u} ajouté à « {g} ».", es: "{u} añadido a « {g} »." },
+  "Removed {u} from “{g}”.": { ru: "{u} удалён из «{g}».", de: "{u} aus „{g}“ entfernt.", fr: "{u} retiré de « {g} ».", es: "{u} eliminado de « {g} »." },
   "Building…": { ru: "Сборка…", de: "Wird gebaut…", fr: "Compilation…", es: "Compilando…" },
   "Build succeeded": { ru: "Сборка успешна", de: "Build erfolgreich", fr: "Compilation réussie", es: "Compilación correcta" },
   "Build failed": { ru: "Сборка провалена", de: "Build fehlgeschlagen", fr: "Échec de la compilation", es: "Compilación fallida" },
@@ -227,6 +254,8 @@ const D: Record<string, Tr> = {
   "(no description)": { ru: "(без описания)", de: "(keine Beschreibung)", fr: "(sans description)", es: "(sin descripción)" },
   "{user} · {time} · {n} file(s)": { ru: "{user} · {time} · {n} файл(ов)", de: "{user} · {time} · {n} Datei(en)", fr: "{user} · {time} · {n} fichier(s)", es: "{user} · {time} · {n} archivo(s)" },
   "Loading file list…": { ru: "Загрузка списка файлов…", de: "Dateiliste wird geladen…", fr: "Chargement de la liste des fichiers…", es: "Cargando lista de archivos…" },
+  "Back to file list": { ru: "Назад к списку файлов", de: "Zurück zur Dateiliste", fr: "Retour à la liste des fichiers", es: "Volver a la lista de archivos" },
+  "in #{n}": { ru: "в #{n}", de: "in #{n}", fr: "dans #{n}", es: "en #{n}" },
   // history list
   "Loading history…": { ru: "Загрузка истории…", de: "Verlauf wird geladen…", fr: "Chargement de l’historique…", es: "Cargando historial…" },
   "No submitted changes.": { ru: "Нет засабмиченных изменений.", de: "Keine übermittelten Änderungen.", fr: "Aucune modification envoyée.", es: "No hay cambios enviados." },
diff --git a/src/p4.ts b/src/p4.ts
index 7785824..147715b 100644
--- a/src/p4.ts
+++ b/src/p4.ts
@@ -22,9 +22,16 @@ export interface OpenedFile {
   change?: string; // "default" or a number
   user?: string;
   client?: string;
+  _spec?: string; // when set, read this exact rev via `p4 print` (submitted/historical file)
   [k: string]: unknown;
 }
 
+// choose the byte source: an exact submitted revision (`p4 print`) when `_spec`
+// is set, otherwise the working copy (local file via `p4 where`).
+export function fileBytes(f: OpenedFile): Promise<ArrayBuffer> {
+  return f._spec ? p4.printDepot(f._spec) : p4.readDepot(f.depotFile || "");
+}
+
 export interface Client {
   client?: string;
   Root?: string;
@@ -86,9 +93,24 @@ export const p4 = {
     if (Array.isArray(r)) return new Uint8Array(r as number[]).buffer;
     return r as ArrayBuffer;
   },
+  // read raw bytes at an exact revision (submitted/historical), e.g. "//depot/f.cpp#7"
+  printDepot: async (spec: string): Promise<ArrayBuffer> => {
+    const r: unknown = await invoke("print_depot", { spec });
+    if (r instanceof ArrayBuffer) return r;
+    if (ArrayBuffer.isView(r)) return (r as ArrayBufferView).buffer as ArrayBuffer;
+    if (Array.isArray(r)) return new Uint8Array(r as number[]).buffer;
+    return r as ArrayBuffer;
+  },
   switchClient: (client: string) => invoke<P4Info>("p4_switch_client", { client }),
+  users: () => invoke<User[]>("p4_users"),
+  groups: (user = "") => invoke<{ group?: string }[]>("p4_groups", { user }),
+  groupMember: (group: string, user: string, add: boolean) => invoke<string>("p4_group_member", { group, user, add }),
+  readAiKey: () => invoke<string>("read_ai_key"),
+  saveAiKey: (key: string) => invoke<void>("save_ai_key", { key }),
 };
 
+export interface User { User?: string; Email?: string; FullName?: string; Access?: string; Update?: string; [k: string]: unknown }
+
 export interface Dir { dir?: string; [k: string]: unknown }
 // depot path -> short leaf name (last segment)
 export function leaf(path?: string): string {