fixes and improvements for new server settings menu

.env.example

@@ -410,6 +410,10 @@ TELESRV_DEFAULT_STICKER_SET_ID=0
 # imported once (matched by filename); renaming a file re-imports it as a new
 # entry. Missing directory is skipped, not an error.
 TELESRV_GIF_SEED_DIR=data/gifs
+# Admin-editable server name/description/icon (Server Settings in the admin
+# panel), served over /owpengram/server-info + /owpengram/server-icon and
+# read fresh on every request -- editing them takes effect with no restart.
+TELESRV_IDENTITY_DIR=data/identity
 
 # Storage low-space guard thresholds (master toggle is TELESRV_STORAGE_LOW_SPACE_GUARD_ENABLE above).
 # localfs: reject new uploads once real free disk bytes fall below this; <=0 disables.

cmd/telesrv-admin/main.go

@@ -27,6 +27,23 @@ const hostStatsPollInterval = 5 * time.Second
 
 const defaultAdminAPIAddr = "127.0.0.1:2599"
 
+// bootID is a random value generated once per process start, exposed via
+// GET /api/session -- see that handler's doc comment for why (the
+// Restart/Update polling flow's way of detecting a genuinely new admin
+// process, not just a slow-to-respond old one).
+var bootID = newBootID()
+
+func newBootID() string {
+	buf := make([]byte, 16)
+	if _, err := rand.Read(buf); err != nil {
+		// crypto/rand failing is effectively unheard of on any real target
+		// this binary runs on; falling back to the wall clock still gives a
+		// value that changes across restarts, which is all this is for.
+		return fmt.Sprintf("t%d", time.Now().UnixNano())
+	}
+	return hex.EncodeToString(buf)
+}
+
 func main() {
 	if err := run(); err != nil {
 		log.Fatal(err)
@@ -95,6 +112,18 @@ type uiConfig struct {
 	// permissions, and the session/login response tells the frontend to hide
 	// the "Third-party marks" nav entry and its routes.
 	HideThirdPartyVerification bool
+	// IdentityDir mirrors config.IdentityDir -- must point at the same
+	// directory owpengram-server reads, so an identity edit here is visible
+	// over /owpengram/server-info immediately (see internal/identity).
+	IdentityDir string
+	// RepoRoot is where Server Settings' Restart/Update/.env-editing (see
+	// internal/procctl) operate: bin/, logs/, .env, .env.example and
+	// .server_panel.json are all expected directly under it, exactly as
+	// tui-panel/server-panel.py expects. Defaults to the process's current
+	// working directory, which is correct whenever this binary is launched
+	// from (or by something that cd'd into) the repo root -- true both for a
+	// manual run and for how the TUI itself launches it.
+	RepoRoot string
 }
 
 // loadConfig 通过 internal/config.Load() 加载 .env 配置文件与环境变量，
@@ -121,6 +150,11 @@ func loadConfig() (uiConfig, error) {
 	}
 	sum := sha256.Sum256([]byte(appCfg.AdminSessionKey))
 
+	repoRoot, err := os.Getwd()
+	if err != nil {
+		return uiConfig{}, fmt.Errorf("resolve repo root: %w", err)
+	}
+
 	return uiConfig{
 		Addr:                       appCfg.AdminUIAddr,
 		PostgresDSN:                appCfg.PostgresDSN,
@@ -132,6 +166,8 @@ func loadConfig() (uiConfig, error) {
 		Permissions:                appCfg.AdminUIPermissions,
 		HideThirdPartyVerification: appCfg.HideThirdPartyVerification,
 		BlobDir:                    appCfg.BlobDir,
+		IdentityDir:                appCfg.IdentityDir,
+		RepoRoot:                   repoRoot,
 	}, nil
 }
 

cmd/telesrv-admin/security.go

@@ -45,6 +45,13 @@ const (
 	// curates the icon catalogue and strips granted marks.
 	permissionBotVerificationReview = "botverification.review"
 	permissionBotVerificationManage = "botverification.manage"
+	// permissionServerManage gates the whole Server Settings panel: identity
+	// (name/description/icon), .env editing, and Restart/Update -- all of it
+	// meaningfully more sensitive than any domain-data action above (.env
+	// editing exposes every secret the deployment holds; Restart/Update runs
+	// git/go and bounces the live MTProto process), so it is one right, not
+	// split into review/manage like the sections above.
+	permissionServerManage = "server.manage"
 )
 
 type permissionsKey struct{}

cmd/telesrv-admin/server.go

@@ -20,6 +20,8 @@ import (
 	"telesrv/internal/admin"
 	"telesrv/internal/domain"
 	"telesrv/internal/hoststats"
+	"telesrv/internal/identity"
+	"telesrv/internal/procctl"
 )
 
 //go:embed web/dist
@@ -31,6 +33,8 @@ type server struct {
 	hostStats *hoststats.Poller
 	web       fs.FS
 	webServer http.Handler
+	identity  *identity.Store
+	serverCtl *procctl.Manager
 }
 
 func newServer(cfg uiConfig, read *readStore, hostStats *hoststats.Poller) (*server, error) {
@@ -44,6 +48,8 @@ func newServer(cfg uiConfig, read *readStore, hostStats *hoststats.Poller) (*ser
 		hostStats: hostStats,
 		web:       web,
 		webServer: http.FileServer(http.FS(web)),
+		identity:  identity.NewStore(cfg.IdentityDir),
+		serverCtl: procctl.NewManager(cfg.RepoRoot),
 	}, nil
 }
 
@@ -163,6 +169,20 @@ func (s *server) routes() http.Handler {
 	mux.Handle("POST /api/actions/upsert-verification-icon", s.botVerificationManage(s.handleUpsertVerificationIconAPI))
 	mux.Handle("POST /api/actions/set-verification-icon-active", s.botVerificationManage(s.handleSetVerificationIconActiveAPI))
 	mux.Handle("POST /api/actions/revoke-custom-verification", s.botVerificationManage(s.handleRevokeCustomVerificationAPI))
+	// Server Settings -- see serversettings.go. Everything here operates
+	// directly on local files/processes (no RPC hop to owpengram-server's
+	// in-process admin API), so it works even for actions (Restart/Update)
+	// that owpengram-server could never safely perform on itself.
+	mux.Handle("GET /api/server/identity", s.serverManage(s.handleServerIdentityAPI))
+	mux.Handle("GET /api/server/icon", s.serverManage(s.handleServerIconAPI))
+	mux.Handle("POST /api/actions/set-server-identity", s.serverManage(s.handleSetServerIdentityAPI))
+	mux.Handle("POST /api/actions/upload-server-icon", s.serverManage(s.handleUploadServerIconAPI))
+	mux.Handle("POST /api/actions/remove-server-icon", s.serverManage(s.handleRemoveServerIconAPI))
+	mux.Handle("GET /api/server/env", s.serverManage(s.handleServerEnvAPI))
+	mux.Handle("POST /api/actions/update-server-env", s.serverManage(s.handleUpdateServerEnvAPI))
+	mux.Handle("GET /api/server/status", s.serverManage(s.handleServerStatusAPI))
+	mux.Handle("POST /api/actions/restart-server", s.serverManage(s.handleRestartServerAPI))
+	mux.Handle("POST /api/actions/update-server", s.serverManage(s.handleUpdateServerAPI))
 	mux.HandleFunc("/api/", func(w http.ResponseWriter, _ *http.Request) {
 		writeAPIError(w, http.StatusNotFound, "api route not found")
 	})
@@ -274,6 +294,12 @@ func (s *server) handleSession(w http.ResponseWriter, r *http.Request) {
 		"actor":                         actorFromContext(r.Context()),
 		"permissions":                   permissionsFromContext(r.Context()).List(),
 		"hide_third_party_verification": s.cfg.HideThirdPartyVerification,
+		// boot_id is random per process start (see main.go) -- Server
+		// Settings' Restart/Update flow polls this after triggering an
+		// action and reloads the page once it changes, which is how it
+		// tells "the old admin process died and a new one answered" apart
+		// from "the old one is just slow to respond".
+		"boot_id": bootID,
 	})
 }
 

cmd/telesrv-admin/serversettings.go

@@ -0,0 +1,264 @@
+package main
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"telesrv/internal/admin"
+)
+
+// serverManage gates the whole Server Settings surface -- see
+// permissionServerManage's doc comment in security.go for why this is one
+// right rather than split review/manage like other sections.
+func (s *server) serverManage(handler http.HandlerFunc) http.Handler {
+	return s.requireAuthAPI(s.requirePermission(permissionServerManage, handler))
+}
+
+// serverCommandResult builds the same admin.CommandResult shape every other
+// action returns, without going through internal/admin's runCommand +
+// Postgres audit log: everything in this file operates on local files/
+// processes directly (see routes() in server.go for why), so there is no
+// owpengram-server-side admin_commands row to write. The actor/reason are
+// still in meta for structured logging if that's ever added; today they are
+// simply not persisted anywhere.
+func serverCommandResult(meta admin.CommandMeta, action string, err error, message string, details map[string]any) admin.CommandResult {
+	status := "completed"
+	errText := ""
+	if err != nil {
+		status = "failed"
+		errText = err.Error()
+		if message == "" {
+			message = "command failed"
+		}
+	}
+	return admin.CommandResult{
+		CommandID: meta.CommandID,
+		Action:    action,
+		Status:    status,
+		DryRun:    meta.DryRun,
+		Message:   message,
+		Details:   details,
+		Error:     errText,
+	}
+}
+
+// --- identity (name/description/icon) ---------------------------------
+
+func (s *server) handleServerIdentityAPI(w http.ResponseWriter, r *http.Request) {
+	info, err := s.identity.Get()
+	if err != nil {
+		writeAPIError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	writeJSON(w, http.StatusOK, info)
+}
+
+// handleServerIconAPI serves the icon's raw bytes for the panel's own
+// preview -- separate from owpengram-server's public /owpengram/server-icon
+// (same underlying file, different process/auth: this one is behind the
+// admin session, not open to clients).
+func (s *server) handleServerIconAPI(w http.ResponseWriter, r *http.Request) {
+	data, ext, ok := s.identity.Icon()
+	if !ok {
+		writeAPIError(w, http.StatusNotFound, "no icon configured")
+		return
+	}
+	contentType := map[string]string{
+		".png": "image/png", ".jpg": "image/jpeg", ".jpeg": "image/jpeg",
+		".webp": "image/webp", ".gif": "image/gif",
+	}[ext]
+	if contentType == "" {
+		contentType = "application/octet-stream"
+	}
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("Cache-Control", "no-store")
+	_, _ = w.Write(data)
+}
+
+type setServerIdentityAPIRequest struct {
+	CommandID   string `json:"command_id"`
+	Reason      string `json:"reason"`
+	Confirm     bool   `json:"confirm"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
+}
+
+func (s *server) handleSetServerIdentityAPI(w http.ResponseWriter, r *http.Request) {
+	var body setServerIdentityAPIRequest
+	if !decodeAction(w, r, &body) {
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "set-server-identity")
+	details := map[string]any{"name": body.Name, "description": body.Description}
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.set_identity", nil, "server identity validated", details))
+		return
+	}
+	err := s.identity.SetText(body.Name, body.Description)
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.set_identity", err, "server identity updated", details))
+}
+
+var allowedServerIconExts = map[string]bool{
+	".png": true, ".jpg": true, ".jpeg": true, ".webp": true, ".gif": true,
+}
+
+const maxServerIconBytes = 2 << 20 // 2 MiB
+
+type uploadServerIconAPIRequest struct {
+	CommandID string `json:"command_id"`
+	Reason    string `json:"reason"`
+	Confirm   bool   `json:"confirm"`
+}
+
+// handleUploadServerIconAPI takes multipart/form-data (a "metadata" JSON
+// field + a "file" field), the same shape handleSetAccountAvatarAPI uses --
+// deliberately not JSON+base64 like the other Server Settings actions:
+// base64 inflates a file ~33%, and decodeAction's plain io.LimitReader caps
+// the request body at 1MiB regardless of maxServerIconBytes, so a real
+// multi-hundred-KB icon would fail decoding ("unexpected EOF" from the
+// truncated body) before this handler ever saw it. Multipart sidesteps that
+// entirely -- the size cap below is enforced on the actual file bytes.
+func (s *server) handleUploadServerIconAPI(w http.ResponseWriter, r *http.Request) {
+	defer r.Body.Close()
+	r.Body = http.MaxBytesReader(w, r.Body, maxServerIconBytes+(1<<20))
+	if err := r.ParseMultipartForm(1 << 20); err != nil {
+		writeAPIError(w, http.StatusBadRequest, "invalid multipart form: "+err.Error())
+		return
+	}
+	if r.MultipartForm != nil {
+		defer r.MultipartForm.RemoveAll()
+	}
+	var body uploadServerIconAPIRequest
+	dec := json.NewDecoder(strings.NewReader(r.FormValue("metadata")))
+	dec.DisallowUnknownFields()
+	if err := dec.Decode(&body); err != nil {
+		writeAPIError(w, http.StatusBadRequest, "invalid metadata: "+err.Error())
+		return
+	}
+	file, header, err := r.FormFile("file")
+	if err != nil {
+		writeAPIError(w, http.StatusBadRequest, "icon file is required")
+		return
+	}
+	defer file.Close()
+	ext := strings.ToLower(filepath.Ext(header.Filename))
+	if !allowedServerIconExts[ext] {
+		writeAPIError(w, http.StatusBadRequest, "unsupported icon extension")
+		return
+	}
+	data, err := io.ReadAll(io.LimitReader(file, maxServerIconBytes+1))
+	if err != nil || len(data) == 0 || len(data) > maxServerIconBytes {
+		writeAPIError(w, http.StatusBadRequest, "icon file is empty or too large (max 2MiB)")
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "upload-server-icon")
+	details := map[string]any{"bytes": len(data), "ext": ext}
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.upload_icon", nil, "server icon validated", details))
+		return
+	}
+	setErr := s.identity.SetIcon(data, ext)
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.upload_icon", setErr, "server icon updated", details))
+}
+
+type removeServerIconAPIRequest struct {
+	CommandID string `json:"command_id"`
+	Reason    string `json:"reason"`
+	Confirm   bool   `json:"confirm"`
+}
+
+func (s *server) handleRemoveServerIconAPI(w http.ResponseWriter, r *http.Request) {
+	var body removeServerIconAPIRequest
+	if !decodeAction(w, r, &body) {
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "remove-server-icon")
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.remove_icon", nil, "server icon removal validated", nil))
+		return
+	}
+	err := s.identity.RemoveIcon()
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.remove_icon", err, "server icon removed", nil))
+}
+
+// --- .env editing --------------------------------------------------------
+
+func (s *server) handleServerEnvAPI(w http.ResponseWriter, r *http.Request) {
+	groups, err := s.serverCtl.ReadEnvGroups()
+	if err != nil {
+		writeAPIError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	writeJSON(w, http.StatusOK, groups)
+}
+
+type updateServerEnvAPIRequest struct {
+	CommandID string            `json:"command_id"`
+	Reason    string            `json:"reason"`
+	Confirm   bool              `json:"confirm"`
+	Values    map[string]string `json:"values"`
+}
+
+func (s *server) handleUpdateServerEnvAPI(w http.ResponseWriter, r *http.Request) {
+	var body updateServerEnvAPIRequest
+	if !decodeAction(w, r, &body) {
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "update-server-env")
+	details := map[string]any{"keys_changed": len(body.Values)}
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.update_env", nil, "would update .env -- takes effect on next Restart/Update", details))
+		return
+	}
+	err := s.serverCtl.WriteEnvValues(body.Values)
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.update_env", err, ".env updated -- restart the server for changes to take effect", details))
+}
+
+// --- status / restart / update -------------------------------------------
+
+func (s *server) handleServerStatusAPI(w http.ResponseWriter, r *http.Request) {
+	writeJSON(w, http.StatusOK, s.serverCtl.Status())
+}
+
+type restartServerAPIRequest struct {
+	CommandID string `json:"command_id"`
+	Reason    string `json:"reason"`
+	Confirm   bool   `json:"confirm"`
+}
+
+func (s *server) handleRestartServerAPI(w http.ResponseWriter, r *http.Request) {
+	var body restartServerAPIRequest
+	if !decodeAction(w, r, &body) {
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "restart-server")
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.restart", nil, "restart validated -- rebuilds and relaunches bin/owpengram-server", nil))
+		return
+	}
+	log, err := s.serverCtl.Restart(r.Context())
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.restart", err, "server restarted", map[string]any{"log": log}))
+}
+
+type updateServerAPIRequest struct {
+	CommandID string `json:"command_id"`
+	Reason    string `json:"reason"`
+	Confirm   bool   `json:"confirm"`
+}
+
+func (s *server) handleUpdateServerAPI(w http.ResponseWriter, r *http.Request) {
+	var body updateServerAPIRequest
+	if !decodeAction(w, r, &body) {
+		return
+	}
+	meta := s.commandMetaFromAPI(r, body.CommandID, body.Reason, body.Confirm, "update-server")
+	if meta.DryRun {
+		writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.update", nil, "update validated -- git pull, rebuild both binaries, relaunch bin/owpengram-server (admin panel binary is rebuilt but not self-restarted)", nil))
+		return
+	}
+	log, err := s.serverCtl.Update(r.Context())
+	writeJSON(w, http.StatusOK, serverCommandResult(meta, "server.update", err, "server updated", map[string]any{"log": log}))
+}

cmd/telesrv-admin/web/dist/index.html

@@ -23,8 +23,8 @@
       })();
     </script>
 
-    <script type="module" crossorigin src="/assets/index-Bt9UBcEE.js"></script>
+    <script type="module" crossorigin src="/assets/index-C0CaRjmH.js"></script>
-    <link rel="stylesheet" crossorigin href="/assets/index-CQKJMNpu.css">
+    <link rel="stylesheet" crossorigin href="/assets/index-Dx2zWoFE.css">
   </head>
   <body>
     <div id="root"></div>

cmd/telesrv-admin/web/src/api.ts

@@ -23,6 +23,9 @@ import type {
   CollectibleUsernameDetail,
   CollectibleUsernameListResponse,
   CommandResult,
+  EnvGroup,
+  ServerIdentity,
+  ServerStatus,
   GroupMessageDetail,
   GroupMessageListResponse,
   MessageDetail,
@@ -232,6 +235,11 @@ export const api = {
 	addStickerToSet: (form: FormData) => request<CommandResult>("/api/actions/add-sticker-to-set", { method: "POST", body: form }),
 	gifCatalog: () => request<GifCatalogListResponse>("/api/gif-catalog"),
 	createGifCatalogEntry: (form: FormData) => request<CommandResult>("/api/actions/create-gif-catalog-entry", { method: "POST", body: form }),
+  serverIdentity: () => request<ServerIdentity>("/api/server/identity"),
+  uploadServerIcon: (form: FormData) => request<CommandResult>("/api/actions/upload-server-icon", { method: "POST", body: form }),
+  serverIconURL: () => `/api/server/icon?t=${Date.now()}`,
+  serverEnv: () => request<EnvGroup[]>("/api/server/env"),
+  serverStatus: () => request<ServerStatus>("/api/server/status"),
   action: (path: string, payload: Record<string, unknown>) => request<CommandResult>(path, {
     method: "POST",
     body: JSON.stringify(payload)

cmd/telesrv-admin/web/src/components/Layout.tsx

@@ -9,6 +9,7 @@ import {
   LogOut,
   Megaphone,
   MessageSquareText,
+  Settings,
   ShieldAlert,
   ShieldCheck,
   Smile,
@@ -18,7 +19,7 @@ import {
 } from "lucide-react";
 import { useEffect, useState, type ReactNode } from "react";
 import { api } from "../api";
-import { permissionBotVerificationReview, permissionVerificationReview, useCan, useThirdPartyVerificationHidden } from "../permissions";
+import { permissionBotVerificationReview, permissionServerManage, permissionVerificationReview, useCan, useThirdPartyVerificationHidden } from "../permissions";
 import { type Navigate, type RouteState, routeTitle } from "../routing";
 import { ThemeSwitch } from "../theme";
 import { AppLink } from "./AppLink";
@@ -57,6 +58,7 @@ export function Shell({
   // Same reasoning for the third-party queue, which has its own right: the two
   // sections are granted independently, so one entry can be visible without the other.
   const canReviewBotVerification = useCan(permissionBotVerificationReview);
+  const canManageServer = useCan(permissionServerManage);
   // Third-party verification is additionally hidden by default (not fully
   // finished) regardless of what the session was granted -- see permissions.tsx.
   const thirdPartyVerificationHidden = useThirdPartyVerificationHidden();
@@ -135,7 +137,13 @@ export function Shell({
               </div>
             )}
           </div>
+          {canManageServer && (
+            <NavLink icon={<Settings size={16} />} href="/server-settings" route={route} navigate={navigate}>{"Server Settings"}</NavLink>
+          )}
         </nav>
+        <div className="sidebar-status">
+          <span className="sidebar-label">{"Version: O7"}</span>
+        </div>
       </aside>
       <div className="workspace">
         <header className="topbar">

cmd/telesrv-admin/web/src/pages/Routes.tsx

@@ -16,6 +16,7 @@ import { MessageDetailPage } from "./MessageDetailPage";
 import { MessagesPage } from "./MessagesPage";
 import { StickerSetsPage } from "./StickerSetsPage";
 import { GifCatalogPage } from "./GifCatalogPage";
+import { ServerSettingsPage } from "./ServerSettingsPage";
 import { ModerationCaseDetailPage } from "./ModerationCaseDetailPage";
 import { ModerationCasesPage } from "./ModerationCasesPage";
 import { StoragePage } from "./StoragePage";
@@ -27,6 +28,7 @@ import {
   PermissionGate,
   ThirdPartyVerificationHiddenGate,
   permissionBotVerificationReview,
+  permissionServerManage,
   permissionVerificationReview
 } from "../permissions";
 
@@ -124,6 +126,13 @@ export function Routes({ route, navigate }: { route: RouteState; navigate: Navig
   if (route.path === "/gif-catalog") {
     return <GifCatalogPage />;
   }
+  if (route.path === "/server-settings") {
+    return (
+      <PermissionGate permission={permissionServerManage}>
+        <ServerSettingsPage />
+      </PermissionGate>
+    );
+  }
   if (route.path === "/messages/detail" || route.path === "/messages/private/detail") {
     return (
       <MessageDetailPage

cmd/telesrv-admin/web/src/pages/ServerSettingsPage.tsx

@@ -0,0 +1,443 @@
+import { ChevronDown, ImageOff, ImagePlus, Loader2, RefreshCw, Trash2, Upload, X } from "lucide-react";
+import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { createPortal } from "react-dom";
+import { api, errorMessage } from "../api";
+import { ActionButton } from "../components/ActionButton";
+import { Alert, LoadingSurface, Metric, PageFrame, SectionHead } from "../components/ui";
+import type { EnvGroup, ServerIdentity, ServerStatus } from "../types";
+
+// Server Settings: the web-panel equivalent of tui-panel/server-panel.py's
+// menu -- admin-editable server name/description/icon (served to clients
+// over /owpengram/server-info + /owpengram/server-icon), .env editing, and
+// Restart/Update. See cmd/telesrv-admin/serversettings.go for the backend.
+export function ServerSettingsPage() {
+  return (
+    <PageFrame title={"Server Settings"} eyebrow={"Identity, .env, and process control -- mirrors the TUI panel"}>
+      <div className="stacked-sections">
+        <IdentitySection />
+        <ServerControlSection />
+        <EnvSection />
+      </div>
+    </PageFrame>
+  );
+}
+
+// --- Identity ---------------------------------------------------------
+
+function IdentitySection() {
+  const [identity, setIdentity] = useState<ServerIdentity | null>(null);
+  const [name, setName] = useState("");
+  const [description, setDescription] = useState("");
+  const [iconModalOpen, setIconModalOpen] = useState(false);
+  const [iconBust, setIconBust] = useState(0);
+  const [iconFailed, setIconFailed] = useState(false);
+  const [error, setError] = useState("");
+
+  async function load() {
+    setError("");
+    try {
+      const info = await api.serverIdentity();
+      setIdentity(info);
+      setName(info.name);
+      setDescription(info.description);
+      setIconFailed(false);
+    } catch (err) {
+      setError(errorMessage(err));
+    }
+  }
+
+  useEffect(() => { void load(); }, []);
+
+  return (
+    <section className="section-block">
+      <SectionHead title={"Server identity"} text={"Shown to clients auto-fetching this server's key -- takes effect immediately, no restart needed."} />
+      {error && <Alert>{error}</Alert>}
+      {!identity ? (
+        <LoadingSurface label={"Loading identity..."} />
+      ) : (
+        <div className="card-body">
+          <div className="entity-head-main">
+            <div className="avatar-edit-slot">
+              {identity.icon_ext && !iconFailed ? (
+                <img
+                  className="avatar-photo-img"
+                  src={api.serverIconURL() + `&b=${iconBust}`}
+                  alt=""
+                  style={{ width: 56, height: 56 }}
+                  onError={() => setIconFailed(true)}
+                />
+              ) : (
+                <div className="avatar-fallback server-icon-fallback" style={{ width: 56, height: 56 }}>
+                  <ImageOff size={20} />
+                </div>
+              )}
+              <button
+                className="icon-btn avatar-edit-btn"
+                type="button"
+                aria-label={"Change server icon"}
+                title={"Change server icon"}
+                onClick={() => setIconModalOpen(true)}
+              >
+                <ImagePlus size={13} />
+              </button>
+            </div>
+            <div className="server-identity-fields">
+              <label className="form-field"><span>{"Name"}</span><input value={name} maxLength={128} onChange={(event) => setName(event.target.value)} /></label>
+              <label className="form-field"><span>{"Description"}</span><input value={description} maxLength={512} onChange={(event) => setDescription(event.target.value)} /></label>
+            </div>
+          </div>
+          <div className="gift-table-actions">
+            <ActionButton
+              tone="neutral"
+              label={"Save identity"}
+              path="/api/actions/set-server-identity"
+              payload={() => ({ name, description })}
+              onDone={() => void load()}
+            />
+          </div>
+        </div>
+      )}
+      {iconModalOpen && (
+        <ServerIconModal
+          hasIcon={!!identity?.icon_ext}
+          onClose={() => setIconModalOpen(false)}
+          onDone={() => { setIconBust((n) => n + 1); setIconFailed(false); void load(); }}
+        />
+      )}
+    </section>
+  );
+}
+
+function ServerIconModal({ hasIcon, onClose, onDone }: { hasIcon: boolean; onClose: () => void; onDone: () => void }) {
+  const [file, setFile] = useState<File | null>(null);
+  const [previewURL, setPreviewURL] = useState("");
+  const [reason, setReason] = useState("");
+  const [busy, setBusy] = useState(false);
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    if (!file) {
+      setPreviewURL("");
+      return;
+    }
+    const url = URL.createObjectURL(file);
+    setPreviewURL(url);
+    return () => URL.revokeObjectURL(url);
+  }, [file]);
+
+  async function submitUpload() {
+    if (!file) {
+      setError("Choose an image file first.");
+      return;
+    }
+    if (!reason.trim()) {
+      setError("Please enter an operation reason");
+      return;
+    }
+    setBusy(true);
+    setError("");
+    try {
+      const form = new FormData();
+      form.set("metadata", JSON.stringify({ command_id: "", reason: reason.trim(), confirm: true }));
+      form.set("file", file, file.name);
+      const result = await api.uploadServerIcon(form);
+      if (result.error) {
+        setError(result.error);
+        return;
+      }
+      onDone();
+      onClose();
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  async function submitRemove() {
+    if (!reason.trim()) {
+      setError("Please enter an operation reason");
+      return;
+    }
+    setBusy(true);
+    setError("");
+    try {
+      const result = await api.action("/api/actions/remove-server-icon", { command_id: "", reason: reason.trim(), confirm: true });
+      if (result.error) {
+        setError(result.error);
+        return;
+      }
+      onDone();
+      onClose();
+    } catch (err) {
+      setError(errorMessage(err));
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return createPortal(
+    <div className="modal-backdrop" role="presentation">
+      <section className="modal command-modal" role="dialog" aria-modal="true" aria-label={"Change server icon"}>
+        <div className="modal-head">
+          <div>
+            <div className="eyebrow">{"Server identity"}</div>
+            <h2>{"Change server icon"}</h2>
+          </div>
+          <button className="icon-btn" type="button" onClick={onClose} disabled={busy} aria-label={"Close"}><X size={15} /></button>
+        </div>
+        <div className="command-body">
+          <label className={`gift-file-picker ${file ? "has-file" : ""}`}>
+            <input type="file" accept=".png,.jpg,.jpeg,.webp,.gif,image/png,image/jpeg,image/webp,image/gif" onChange={(event) => setFile(event.target.files?.[0] ?? null)} />
+            {previewURL ? <img className="gift-file-icon" src={previewURL} alt="" style={{ objectFit: "cover" }} /> : <ImagePlus size={22} />}
+            <span className="gift-file-copy"><span className="gift-field-label">{"New icon"}</span><strong>{file ? file.name : "Choose a PNG, JPEG, WebP, or GIF image"}</strong></span>
+            <span className="gift-file-action">{file ? "Change file" : "Choose file"}</span>
+          </label>
+          <label className="gift-reason-field"><span>{"Audit reason"}</span><input value={reason} placeholder={"Briefly describe why the server icon is changing"} onChange={(event) => setReason(event.target.value)} /></label>
+          {error && <Alert>{error}</Alert>}
+        </div>
+        <div className="modal-actions">
+          <button className="btn" type="button" onClick={onClose} disabled={busy}>{"Close"}</button>
+          {hasIcon && (
+            <button className="btn danger icon-text" type="button" onClick={() => void submitRemove()} disabled={busy}>
+              {busy ? <Loader2 className="spin" size={15} /> : <Trash2 size={15} />}
+              {"Remove icon"}
+            </button>
+          )}
+          <button className="btn primary icon-text" type="button" onClick={() => void submitUpload()} disabled={busy}>
+            {busy ? <Loader2 className="spin" size={15} /> : <Upload size={15} />}
+            {"Upload icon"}
+          </button>
+        </div>
+      </section>
+    </div>,
+    document.body
+  );
+}
+
+// --- Server control (status / restart / update) --------------------------
+
+function sleep(ms: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+// useAdminRestartWatcher backs the "the admin panel is bouncing itself"
+// flow after Restart/Update: those actions ask owpengram-server to relaunch
+// the admin process once *it* is back up (see internal/procctl's
+// PendingAdminRestart), so from the browser's side this just means polling
+// /api/session until a *different* boot_id answers -- proof a genuinely new
+// process is up, not just that the old one is still slow -- then reloading
+// the page. A timeout surfaces as a message with a manual reload button
+// instead of spinning forever if something went wrong server-side.
+function useAdminRestartWatcher() {
+  const [waiting, setWaiting] = useState(false);
+  const [timedOut, setTimedOut] = useState(false);
+  const cancelled = useRef(false);
+
+  const watch = useCallback(async (timeoutMs = 150000) => {
+    cancelled.current = false;
+    setTimedOut(false);
+    setWaiting(true);
+    let baseline = "";
+    try {
+      baseline = (await api.session()).boot_id ?? "";
+    } catch {
+      // Falls through to polling anyway -- worst case it reloads on the
+      // first boot_id it manages to read, which is still correct.
+    }
+    const deadline = Date.now() + timeoutMs;
+    while (Date.now() < deadline) {
+      if (cancelled.current) return;
+      await sleep(1500);
+      try {
+        const session = await api.session();
+        if (session.boot_id && session.boot_id !== baseline) {
+          window.location.reload();
+          return;
+        }
+      } catch {
+        // Expected mid-bounce: the old process is dying or the new one
+        // hasn't opened its listener yet. Keep polling.
+      }
+    }
+    setWaiting(false);
+    setTimedOut(true);
+  }, []);
+
+  const dismiss = useCallback(() => {
+    cancelled.current = true;
+    setWaiting(false);
+    setTimedOut(false);
+  }, []);
+
+  return { waiting, timedOut, watch, dismiss };
+}
+
+function RestartOverlay({ label, timedOut, onDismiss }: { label: string; timedOut: boolean; onDismiss: () => void }) {
+  return createPortal(
+    <div className="modal-backdrop" role="presentation">
+      <section className="modal command-modal restart-overlay" role="dialog" aria-modal="true" aria-label={label}>
+        {timedOut ? (
+          <div className="command-body restart-overlay-body">
+            <Alert>{"The admin panel did not come back within the expected time. It may still be building/restarting -- reload manually in a bit, or check the server logs."}</Alert>
+            <div className="gift-table-actions restart-overlay-actions">
+              <button className="btn" type="button" onClick={onDismiss}>{"Dismiss"}</button>
+              <button className="btn primary" type="button" onClick={() => window.location.reload()}>{"Reload now"}</button>
+            </div>
+          </div>
+        ) : (
+          <div className="command-body restart-overlay-body">
+            <Loader2 className="spin" size={28} />
+            <p>{label}</p>
+          </div>
+        )}
+      </section>
+    </div>,
+    document.body
+  );
+}
+
+function ServerControlSection() {
+  const [status, setStatus] = useState<ServerStatus | null>(null);
+  const [error, setError] = useState("");
+  const [overlayLabel, setOverlayLabel] = useState("");
+  const restartWatcher = useAdminRestartWatcher();
+
+  async function load() {
+    setError("");
+    try {
+      setStatus(await api.serverStatus());
+    } catch (err) {
+      setError(errorMessage(err));
+    }
+  }
+
+  useEffect(() => { void load(); }, []);
+
+  return (
+    <section className="section-block">
+      <SectionHead
+        title={"Process control"}
+        text={"Restart rebuilds and relaunches owpengram-server. Update also runs git pull first and rebuilds both binaries. Either way the admin panel bounces onto its (possibly rebuilt) binary too, a few seconds after the server comes back -- this page reloads itself once that's done."}
+        action={<button className="btn icon-text" type="button" onClick={() => void load()}><RefreshCw size={15} /> {"Refresh status"}</button>}
+      />
+      {error && <Alert>{error}</Alert>}
+      <div className="card-body">
+        {status && (
+          <div className="metric-row">
+            <Metric label={"owpengram-server"} value={status.ServerAlive ? `running (pid ${status.ServerPID})` : "stopped"} tone={status.ServerAlive ? "good" : "danger"} />
+            <Metric label={"admin panel"} value={status.AdminAlive ? `running (pid ${status.AdminPID})` : "stopped"} tone={status.AdminAlive ? "good" : "danger"} />
+          </div>
+        )}
+        <div className="gift-table-actions">
+          <ActionButton
+            tone="warn"
+            label={"Restart server"}
+            path="/api/actions/restart-server"
+            payload={() => ({})}
+            onDone={() => {
+              setOverlayLabel("Restarting owpengram-server and the admin panel...");
+              void restartWatcher.watch();
+            }}
+          />
+          <ActionButton
+            tone="danger"
+            label={"Update (git pull + rebuild + restart)"}
+            path="/api/actions/update-server"
+            payload={() => ({})}
+            onDone={() => {
+              setOverlayLabel("Pulling, rebuilding, and restarting owpengram-server and the admin panel...");
+              void restartWatcher.watch();
+            }}
+          />
+        </div>
+      </div>
+      {restartWatcher.waiting && <RestartOverlay label={overlayLabel} timedOut={false} onDismiss={restartWatcher.dismiss} />}
+      {restartWatcher.timedOut && <RestartOverlay label={overlayLabel} timedOut={true} onDismiss={restartWatcher.dismiss} />}
+    </section>
+  );
+}
+
+// --- .env editor -----------------------------------------------------
+
+function EnvSection() {
+  const [groups, setGroups] = useState<EnvGroup[]>([]);
+  const [values, setValues] = useState<Record<string, string>>({});
+  const [open, setOpen] = useState<Record<string, boolean>>({});
+  const [error, setError] = useState("");
+
+  async function load() {
+    setError("");
+    try {
+      const g = await api.serverEnv();
+      setGroups(g);
+      const next: Record<string, string> = {};
+      for (const group of g) {
+        for (const field of group.fields) {
+          next[field.key] = field.value;
+        }
+      }
+      setValues(next);
+    } catch (err) {
+      setError(errorMessage(err));
+    }
+  }
+
+  useEffect(() => { void load(); }, []);
+
+  const fieldCount = useMemo(() => groups.reduce((sum, g) => sum + g.fields.length, 0), [groups]);
+
+  return (
+    <section className="section-block">
+      <SectionHead title={"Environment (.env)"} text={`${fieldCount} setting(s) across ${groups.length} group(s). Changes take effect on the next Restart/Update.`} />
+      {error && <Alert>{error}</Alert>}
+      <div className="env-groups">
+        {groups.map((group) => {
+          const isOpen = !!open[group.title];
+          return (
+            <div key={group.title} className={`env-group ${isOpen ? "open" : ""}`}>
+              <button
+                className="env-group-toggle"
+                type="button"
+                aria-expanded={isOpen}
+                onClick={() => setOpen((prev) => ({ ...prev, [group.title]: !prev[group.title] }))}
+              >
+                <span className="env-group-toggle-text">
+                  <span className="env-group-toggle-title">{group.title}</span>
+                  <span className="env-group-toggle-count">{`${group.fields.length} field${group.fields.length === 1 ? "" : "s"}`}</span>
+                </span>
+                <ChevronDown size={16} className="env-group-chevron" />
+              </button>
+              {isOpen && (
+                <div className="env-group-body">
+                  {group.description && <p className="env-group-desc">{group.description}</p>}
+                  {group.fields.map((field) => (
+                    <label key={field.key} className="form-field env-field">
+                      <span className="mono">{field.key}</span>
+                      {field.description && <span className="env-field-desc">{field.description}</span>}
+                      <input
+                        type={field.sensitive ? "password" : "text"}
+                        value={values[field.key] ?? ""}
+                        placeholder={field.default_value}
+                        onChange={(event) => setValues((prev) => ({ ...prev, [field.key]: event.target.value }))}
+                      />
+                    </label>
+                  ))}
+                </div>
+              )}
+            </div>
+          );
+        })}
+      </div>
+      <div className="gift-table-actions env-save-row">
+        <ActionButton
+          tone="warn"
+          label={"Save .env changes"}
+          path="/api/actions/update-server-env"
+          payload={() => ({ values })}
+          onDone={() => void load()}
+        />
+      </div>
+    </section>
+  );
+}

cmd/telesrv-admin/web/src/permissions.tsx

@@ -12,6 +12,9 @@ export const permissionVerificationRevoke = "verification.revoke";
 // verifier roster, the icon catalogue and taking a granted mark away.
 export const permissionBotVerificationReview = "botverification.review";
 export const permissionBotVerificationManage = "botverification.manage";
+// Server Settings: identity, .env, restart/update. One right, not
+// review/manage -- see the constant's doc comment in security.go.
+export const permissionServerManage = "server.manage";
 
 // GET /api/session is read once at boot; the panel keeps the answer here so a
 // section the session may not use is hidden instead of rendered into a 403. This

cmd/telesrv-admin/web/src/routing.ts

@@ -31,5 +31,6 @@ export function routeTitle(pathname: string): string {
   if (pathname.startsWith("/messages")) return "Message Audit";
 	if (pathname.startsWith("/stickers")) return "Stickers";
   if (pathname.startsWith("/gif-catalog")) return "GIFs";
+  if (pathname.startsWith("/server-settings")) return "Server Settings";
   return "Operations Console";
 }

cmd/telesrv-admin/web/src/styles/03-entities-and-actions.css

@@ -928,3 +928,134 @@
   text-transform: uppercase;
   letter-spacing: 0.04em;
 }
+
+/* --- Server Settings ---------------------------------------------------- */
+
+/* Bare .card-body (outside .action-groups, which scopes its own flex rules)
+   just needs a sensible vertical rhythm below a SectionHead -- used as-is by
+   IdentitySection/ServerControlSection on the Server Settings page. */
+.card-body {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+
+.server-identity-fields {
+  display: grid;
+  flex: 1 1 auto;
+  min-width: 0;
+  gap: 8px;
+}
+
+.server-icon-fallback {
+  color: var(--muted);
+  background: var(--panel-subtle);
+  border: 1px dashed var(--line-strong);
+}
+
+.env-groups {
+  display: grid;
+  gap: 8px;
+}
+
+.env-group {
+  overflow: hidden;
+  background: var(--panel);
+  border: 1px solid var(--line);
+  border-radius: var(--radius);
+}
+
+.env-group-toggle {
+  display: flex;
+  width: 100%;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  padding: 11px 14px;
+  background: var(--panel-subtle);
+  border: none;
+  cursor: pointer;
+  text-align: left;
+  transition: background-color 140ms ease;
+}
+
+.env-group-toggle:hover {
+  background: var(--brand-tint);
+}
+
+.env-group-toggle-text {
+  display: flex;
+  min-width: 0;
+  align-items: baseline;
+  gap: 8px;
+}
+
+.env-group-toggle-title {
+  color: var(--heading);
+  font-size: 13px;
+  font-weight: 800;
+}
+
+.env-group-toggle-count {
+  flex-shrink: 0;
+  color: var(--muted);
+  font-size: 11px;
+  font-weight: 700;
+}
+
+.env-group-chevron {
+  flex-shrink: 0;
+  color: var(--muted);
+  transition: transform 140ms ease;
+}
+
+.env-group.open .env-group-chevron {
+  transform: rotate(180deg);
+}
+
+.env-group-body {
+  display: grid;
+  gap: 12px;
+  padding: 14px;
+  border-top: 1px solid var(--line);
+}
+
+.env-group-desc {
+  margin: 0;
+  color: var(--muted);
+  font-size: 12px;
+}
+
+.env-field .env-field-desc {
+  color: var(--muted);
+  font-size: 11px;
+  font-weight: 500;
+  text-transform: none;
+  letter-spacing: normal;
+}
+
+.env-save-row {
+  margin-top: 12px;
+}
+
+.restart-overlay {
+  width: min(440px, 100%);
+}
+
+.restart-overlay-body {
+  display: grid;
+  justify-items: center;
+  gap: 12px;
+  padding: 28px 20px;
+  text-align: center;
+}
+
+.restart-overlay-body p {
+  margin: 0;
+  color: var(--text-soft);
+  font-weight: 700;
+}
+
+.restart-overlay-actions {
+  justify-content: center;
+}

cmd/telesrv-admin/web/src/types.ts

@@ -580,6 +580,10 @@ export type AdminSession = {
   // 404, so this is a UI convenience on top of a real enforcement, not the
   // enforcement itself.
   hide_third_party_verification?: boolean;
+  // Random per admin-process-start value -- see the Go handler's doc
+  // comment. Used by Server Settings' Restart/Update flow to detect a
+  // genuinely new admin process after asking it to bounce.
+  boot_id?: string;
 };
 
 export type AdminLoginResult = AdminSession & {
@@ -829,3 +833,31 @@ export type GroupMessageListResponse = {
   limit: number;
   rows: GroupMessageRow[];
 };
+
+export type ServerIdentity = {
+  name: string;
+  description: string;
+  icon_ext?: string;
+};
+
+export type EnvField = {
+  key: string;
+  default_value: string;
+  description: string;
+  enabled_by_default: boolean;
+  sensitive: boolean;
+  value: string;
+};
+
+export type EnvGroup = {
+  title: string;
+  description: string;
+  fields: EnvField[];
+};
+
+export type ServerStatus = {
+  ServerPID: number;
+  ServerAlive: boolean;
+  AdminPID: number;
+  AdminAlive: boolean;
+};

cmd/telesrv/main.go

@@ -68,6 +68,7 @@ import (
 	"telesrv/internal/otpdelivery"
 	otpsmtp "telesrv/internal/otpdelivery/smtp"
 	otpwebhook "telesrv/internal/otpdelivery/webhook"
+	"telesrv/internal/procctl"
 	"telesrv/internal/rpc"
 	"telesrv/internal/seed/catalog"
 	"telesrv/internal/sfu"
@@ -1547,6 +1548,7 @@ func run(logger *zap.Logger) error {
 		DC:                            cfg.DC,
 		StrictDC:                      cfg.StrictDCCheck,
 		RSAKey:                        rsaKey,
+		IdentityDir:                   cfg.IdentityDir,
 		LayerRPC:                      router,
 		AuthKeys:                      authKeyStore,
 		ActiveSessions:                activeSessions,
@@ -1581,6 +1583,23 @@ func run(logger *zap.Logger) error {
 				zap.Uint("schema_version", migrationStatus.Version),
 				zap.String("blob_backend", "localfs"),
 			)
+			// Picks up a pending "please bounce the admin panel" request left
+			// by cmd/telesrv-admin's Restart/Update (internal/procctl) --
+			// see HandlePendingAdminRestart's doc comment for why this
+			// process (the new one, already up) is the safe place to do
+			// that from, not the admin panel doing it to itself. Repo root
+			// is cwd, matching cmd/telesrv-admin's own convention; a no-op,
+			// not an error, when no restart was requested or the repo
+			// layout (bin/, .server_panel.json) isn't present.
+			go func() {
+				if root, err := os.Getwd(); err == nil {
+					if restarted, err := procctl.NewManager(root).HandlePendingAdminRestart(ctx); err != nil {
+						logger.Warn("admin panel auto-restart failed", zap.Error(err))
+					} else if restarted {
+						logger.Info("admin panel restarted after server restart/update")
+					}
+				}
+			}()
 		},
 	})
 	metricRegistry.AddGaugeProvider(func() []obsmetrics.GaugeSample {

internal/config/config.go

@@ -299,6 +299,11 @@ type Config struct {
 	// StickerSeedDir, this expects no export manifest, just raw files dropped
 	// in. Missing directory is skipped, not an error.
 	GifSeedDir string
+	// IdentityDir holds the admin-editable server identity (name/description
+	// in identity.json, icon as icon.<ext>) served over /owpengram/server-info
+	// and /owpengram/server-icon -- see internal/identity. Read fresh on every
+	// request, so admin edits apply immediately with no server restart.
+	IdentityDir string
 	// BusinessAIProvider 控制服务端 Business automation 回复生成器。
 	// 空值/"echo" 回显触发私聊文本，用于跑通后续 AI provider 链路；
 	// "template" 使用 quick reply 模板。
@@ -776,6 +781,7 @@ func Load() (Config, error) {
 		StickerSeedMaxSets:            envIntOr("TELESRV_STICKER_SEED_MAX_SETS", 300),
 		PremiumPromoSeedDir:           envOr("TELESRV_PREMIUM_PROMO_SEED_DIR", "data/premium-promo"),
 		GifSeedDir:                    envOr("TELESRV_GIF_SEED_DIR", "data/gifs"),
+		IdentityDir:                   envOr("TELESRV_IDENTITY_DIR", "data/identity"),
 		MapboxToken:                   envOr("TELESRV_MAPBOX_TOKEN", ""),
 		MapTileCacheDir:               envOr("TELESRV_MAPTILE_CACHE_DIR", "data/maptiles"),
 		ExternalMediaEnable:           envBoolOr("TELESRV_EXTERNAL_MEDIA_ENABLE", true),

internal/identity/identity.go

@@ -0,0 +1,152 @@
+// Package identity stores the admin-editable server name/description/icon
+// shown to clients over the same-port HTTP endpoints in internal/mtprotoedge
+// (/owpengram/server-info, /owpengram/server-icon). It is deliberately not
+// part of internal/config's Config: config is loaded once at process start
+// from .env, while identity is meant to be edited from the admin web panel
+// and take effect immediately, with no server restart -- so it lives as
+// plain files on disk, read fresh on every request instead of cached in
+// memory.
+package identity
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const (
+	metaFileName = "identity.json"
+	iconBaseName = "icon"
+)
+
+// Info is the editable identity shown to clients.
+type Info struct {
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	// IconExt is the icon file's extension (e.g. ".png"), empty when no
+	// icon has been uploaded. Kept alongside Name/Description so Store can
+	// find the icon file without a directory listing.
+	IconExt string `json:"icon_ext,omitempty"`
+}
+
+// Store reads/writes Info and the icon file under a directory (typically
+// Config.IdentityDir). All methods are safe to call from multiple goroutines
+// and multiple processes (the admin binary writes, the main server binary
+// reads) -- writes are atomic via a temp file + rename.
+type Store struct {
+	dir string
+}
+
+func NewStore(dir string) *Store {
+	return &Store{dir: dir}
+}
+
+func (s *Store) metaPath() string {
+	return filepath.Join(s.dir, metaFileName)
+}
+
+func (s *Store) iconPath(ext string) string {
+	return filepath.Join(s.dir, iconBaseName+ext)
+}
+
+// Get reads the current identity. A missing file is not an error -- it just
+// means nothing has been configured yet, so Info{} (all empty) is returned.
+func (s *Store) Get() (Info, error) {
+	data, err := os.ReadFile(s.metaPath())
+	if os.IsNotExist(err) {
+		return Info{}, nil
+	}
+	if err != nil {
+		return Info{}, fmt.Errorf("identity: read: %w", err)
+	}
+	var info Info
+	if err := json.Unmarshal(data, &info); err != nil {
+		return Info{}, fmt.Errorf("identity: decode: %w", err)
+	}
+	return info, nil
+}
+
+// SetText updates name/description, preserving whatever icon is already
+// configured.
+func (s *Store) SetText(name, description string) error {
+	info, err := s.Get()
+	if err != nil {
+		return err
+	}
+	info.Name = strings.TrimSpace(name)
+	info.Description = strings.TrimSpace(description)
+	return s.save(info)
+}
+
+// SetIcon replaces the icon file (removing any previous one under a
+// different extension) and records its extension in identity.json.
+// ext must include the leading dot (e.g. ".png").
+func (s *Store) SetIcon(data []byte, ext string) error {
+	info, err := s.Get()
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(s.dir, 0o755); err != nil {
+		return fmt.Errorf("identity: mkdir: %w", err)
+	}
+	if info.IconExt != "" && info.IconExt != ext {
+		_ = os.Remove(s.iconPath(info.IconExt))
+	}
+	if err := writeFileAtomic(s.iconPath(ext), data, 0o644); err != nil {
+		return fmt.Errorf("identity: write icon: %w", err)
+	}
+	info.IconExt = ext
+	return s.save(info)
+}
+
+// RemoveIcon deletes the configured icon, if any.
+func (s *Store) RemoveIcon() error {
+	info, err := s.Get()
+	if err != nil {
+		return err
+	}
+	if info.IconExt == "" {
+		return nil
+	}
+	_ = os.Remove(s.iconPath(info.IconExt))
+	info.IconExt = ""
+	return s.save(info)
+}
+
+// Icon returns the icon's raw bytes and its file extension, or ("", nil,
+// false) when no icon is configured.
+func (s *Store) Icon() (data []byte, ext string, ok bool) {
+	info, err := s.Get()
+	if err != nil || info.IconExt == "" {
+		return nil, "", false
+	}
+	raw, err := os.ReadFile(s.iconPath(info.IconExt))
+	if err != nil {
+		return nil, "", false
+	}
+	return raw, info.IconExt, true
+}
+
+func (s *Store) save(info Info) error {
+	if err := os.MkdirAll(s.dir, 0o755); err != nil {
+		return fmt.Errorf("identity: mkdir: %w", err)
+	}
+	data, err := json.MarshalIndent(info, "", "  ")
+	if err != nil {
+		return fmt.Errorf("identity: encode: %w", err)
+	}
+	if err := writeFileAtomic(s.metaPath(), data, 0o644); err != nil {
+		return fmt.Errorf("identity: write: %w", err)
+	}
+	return nil
+}
+
+func writeFileAtomic(path string, data []byte, perm os.FileMode) error {
+	tmp := path + ".tmp"
+	if err := os.WriteFile(tmp, data, perm); err != nil {
+		return err
+	}
+	return os.Rename(tmp, path)
+}

internal/identity/identity_test.go

@@ -0,0 +1,95 @@
+package identity
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestStoreTextRoundTrip(t *testing.T) {
+	s := NewStore(t.TempDir())
+
+	info, err := s.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info != (Info{}) {
+		t.Fatalf("expected zero-value Info before any write, got %+v", info)
+	}
+
+	if err := s.SetText("  OwpenGram  ", "  A self-hosted server.  "); err != nil {
+		t.Fatal(err)
+	}
+	info, err = s.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.Name != "OwpenGram" || info.Description != "A self-hosted server." {
+		t.Fatalf("got %+v", info)
+	}
+}
+
+func TestStoreIconRoundTrip(t *testing.T) {
+	dir := t.TempDir()
+	s := NewStore(dir)
+
+	if _, _, ok := s.Icon(); ok {
+		t.Fatal("expected no icon before any upload")
+	}
+
+	png := []byte{0x89, 'P', 'N', 'G', 1, 2, 3}
+	if err := s.SetIcon(png, ".png"); err != nil {
+		t.Fatal(err)
+	}
+	data, ext, ok := s.Icon()
+	if !ok || ext != ".png" || string(data) != string(png) {
+		t.Fatalf("Icon() = %v, %q, %v", data, ext, ok)
+	}
+	if _, err := os.Stat(filepath.Join(dir, "icon.png")); err != nil {
+		t.Fatal(err)
+	}
+
+	// Replacing with a different extension removes the old file.
+	jpg := []byte{0xFF, 0xD8, 0xFF}
+	if err := s.SetIcon(jpg, ".jpg"); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := os.Stat(filepath.Join(dir, "icon.png")); !os.IsNotExist(err) {
+		t.Fatal("old icon.png should have been removed")
+	}
+	data, ext, ok = s.Icon()
+	if !ok || ext != ".jpg" || string(data) != string(jpg) {
+		t.Fatalf("Icon() after replace = %v, %q, %v", data, ext, ok)
+	}
+
+	if err := s.RemoveIcon(); err != nil {
+		t.Fatal(err)
+	}
+	if _, _, ok := s.Icon(); ok {
+		t.Fatal("expected no icon after RemoveIcon")
+	}
+
+	// Name/description set earlier (none here) must survive icon churn --
+	// Get() after all this should still report a clean, non-error zero name.
+	info, err := s.Get()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if info.IconExt != "" {
+		t.Fatalf("IconExt should be empty after removal, got %q", info.IconExt)
+	}
+}
+
+func TestStorePreservesIconAcrossTextEdits(t *testing.T) {
+	s := NewStore(t.TempDir())
+	if err := s.SetIcon([]byte{1, 2, 3}, ".webp"); err != nil {
+		t.Fatal(err)
+	}
+	if err := s.SetText("New Name", "New description"); err != nil {
+		t.Fatal(err)
+	}
+	_, ext, ok := s.Icon()
+	if !ok || ext != ".webp" {
+		t.Fatalf("icon lost after unrelated SetText: ext=%q ok=%v", ext, ok)
+	}
+}

internal/mtprotoedge/server.go

@@ -26,6 +26,7 @@ import (
 	"github.com/iamxvbaba/td/transport"
 
 	"github.com/iamxvbaba/td/tlprofile"
+	"telesrv/internal/identity"
 	"telesrv/internal/store"
 	"telesrv/internal/store/memory"
 )
@@ -343,6 +344,11 @@ type Options struct {
 	StrictDC bool
 	// RSAKey 是 server RSA 私钥，用于密钥交换。nil 时无法完成握手。
 	RSAKey *rsa.PrivateKey
+	// IdentityDir, when non-empty, enables serving the admin-editable server
+	// name/description/icon over ServerInfoPath/ServerIconPath (see
+	// internal/identity). Empty disables the feature -- those fields are
+	// simply omitted, RSA key/DC info still serve as before.
+	IdentityDir string
 	// AuthKeys 持久化 auth key。默认内存实现。
 	AuthKeys store.AuthKeyStore
 	// ActiveSessions 管理活跃连接。默认新建；传入时可让 RPC 层共享同一注册表。
@@ -523,6 +529,9 @@ type Server struct {
 	// from a host:port instead of a manual openssl + copy-paste.
 	pubKeyPEM []byte
 
+	// identityStore is nil when Options.IdentityDir is empty (feature off).
+	identityStore *identity.Store
+
 	// onFrame 是测试钩子：收到一帧时回调其字节数；生产为 nil。
 	onFrame func(n int)
 }
@@ -582,6 +591,9 @@ func New(opts Options) *Server {
 		rpcRewrap: newRPCRewrapRegistry(opts.RPCGlobalMaxTasks),
 		admission: newAdmissionController(opts.MaxConnections, opts.MaxConnectionsPerIP, opts.MaxConcurrentHandshakes),
 	}
+	if opts.IdentityDir != "" {
+		server.identityStore = identity.NewStore(opts.IdentityDir)
+	}
 	conns.setLogicalSessionReleaseHook(func(key sessionKey) {
 		server.rpcResults.forgetSession(key.authKeyID, key.sessionID)
 	})
@@ -718,6 +730,7 @@ func (s *Server) serveMixed(ctx context.Context, ln net.Listener) error {
 			websocketRouteHandler(wsHandler, s.websocketOrigins),
 			s.dc,
 			s.pubKeyPEM,
+			s.identityStore,
 		),
 		ReadHeaderTimeout: minDuration(10*time.Second, s.handshakeTimeout),
 		BaseContext: func(net.Listener) context.Context {

internal/mtprotoedge/server_info_http.go

@@ -5,7 +5,11 @@ import (
 	"crypto/x509"
 	"encoding/json"
 	"encoding/pem"
+	"mime"
 	"net/http"
+	"strconv"
+
+	"telesrv/internal/identity"
 )
 
 // ServerInfoPath is the well-known same-port HTTP path a client can GET to
@@ -20,13 +24,26 @@ import (
 // active, i.e. TELESRV_WEBSOCKET_ENABLE=true (the default).
 const ServerInfoPath = "/owpengram/server-info"
 
+// ServerIconPath serves the server's icon as a raw image, separately from
+// ServerInfoPath's JSON -- avoids inflating every server-info fetch with a
+// base64 blob when most callers only need it once, and lets it be cached/
+// requested independently (e.g. an <img src> tag).
+const ServerIconPath = "/owpengram/server-icon"
+
 // ServerInfoResponse is ServerInfoPath's JSON body. RSAPublicKeyPEM is the
 // PKCS#1 "RSA PUBLIC KEY" PEM block -- the same format
 // `openssl rsa -RSAPublicKey_out` produces, and what the client's "Add
-// Server" RSA key field already expects verbatim.
+// Server" RSA key field already expects verbatim. Name/Description are
+// admin-edited via internal/identity and optional -- clients should treat
+// blank as "no override" and keep whatever the user typed.
 type ServerInfoResponse struct {
 	DCID            int    `json:"dc_id"`
 	RSAPublicKeyPEM string `json:"rsa_public_key_pem"`
+	Name            string `json:"name,omitempty"`
+	Description     string `json:"description,omitempty"`
+	// HasIcon tells the client whether GET ServerIconPath is worth calling,
+	// without requiring a separate round trip just to find out.
+	HasIcon bool `json:"has_icon,omitempty"`
 }
 
 // rsaPublicKeyPEM renders key's public half as a PKCS#1 PEM block, matching
@@ -41,34 +58,108 @@ func rsaPublicKeyPEM(key *rsa.PrivateKey) []byte {
 	return pem.EncodeToMemory(&pem.Block{Type: "RSA PUBLIC KEY", Bytes: der})
 }
 
-// serverInfoHTTPHandler serves ServerInfoResponse at ServerInfoPath and
+// serverInfoHTTPHandler serves ServerInfoResponse at ServerInfoPath and the
-// delegates every other path to next (the existing WebSocket route
+// raw icon bytes at ServerIconPath, delegating every other path to next (the
-// handler). pubKeyPEM is nil when the server has no RSA key configured
+// existing WebSocket route handler). pubKeyPEM is nil when the server has no
-// (shouldn't happen in production -- handshakes would already be broken --
+// RSA key configured (shouldn't happen in production -- handshakes would
-// but a client asking anyway gets 503, not a panic or an empty key).
+// already be broken -- but a client asking anyway gets 503, not a panic or
-func serverInfoHTTPHandler(next http.Handler, dc int, pubKeyPEM []byte) http.Handler {
+// an empty key). identityStore may be nil (identity feature disabled);
+// Name/Description/icon are then simply omitted, RSA key/DC still serve.
+func serverInfoHTTPHandler(
+	next http.Handler,
+	dc int,
+	pubKeyPEM []byte,
+	identityStore *identity.Store,
+) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != ServerInfoPath {
+		switch r.URL.Path {
+		case ServerInfoPath:
+			serveServerInfo(w, r, dc, pubKeyPEM, identityStore)
+		case ServerIconPath:
+			serveServerIcon(w, r, identityStore)
+		default:
 			next.ServeHTTP(w, r)
-			return
 		}
-		if r.Method != http.MethodGet && r.Method != http.MethodHead {
-			w.Header().Set("Allow", "GET, HEAD")
-			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
-			return
-		}
-		if len(pubKeyPEM) == 0 {
-			http.Error(w, "server key not configured", http.StatusServiceUnavailable)
-			return
-		}
-		w.Header().Set("Content-Type", "application/json; charset=utf-8")
-		w.Header().Set("Cache-Control", "no-store")
-		if r.Method == http.MethodHead {
-			return
-		}
-		_ = json.NewEncoder(w).Encode(ServerInfoResponse{
-			DCID:            dc,
-			RSAPublicKeyPEM: string(pubKeyPEM),
-		})
 	})
 }
+
+func serveServerInfo(
+	w http.ResponseWriter,
+	r *http.Request,
+	dc int,
+	pubKeyPEM []byte,
+	identityStore *identity.Store,
+) {
+	if r.Method != http.MethodGet && r.Method != http.MethodHead {
+		w.Header().Set("Allow", "GET, HEAD")
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if len(pubKeyPEM) == 0 {
+		http.Error(w, "server key not configured", http.StatusServiceUnavailable)
+		return
+	}
+	resp := ServerInfoResponse{
+		DCID:            dc,
+		RSAPublicKeyPEM: string(pubKeyPEM),
+	}
+	if identityStore != nil {
+		if info, err := identityStore.Get(); err == nil {
+			resp.Name = info.Name
+			resp.Description = info.Description
+			resp.HasIcon = info.IconExt != ""
+		}
+	}
+	body, err := json.Marshal(resp)
+	if err != nil {
+		http.Error(w, "encode server info", http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.Header().Set("Cache-Control", "no-store")
+	// See serveServerIcon's identical Content-Length comment -- same reason:
+	// keeps net/http from chunked-encoding a response the desktop client's
+	// raw-socket parser can't decode. name/description are short today, but
+	// nothing enforces that server-side, so this isn't purely defensive.
+	w.Header().Set("Content-Length", strconv.Itoa(len(body)))
+	if r.Method == http.MethodHead {
+		return
+	}
+	_, _ = w.Write(body)
+}
+
+func serveServerIcon(w http.ResponseWriter, r *http.Request, identityStore *identity.Store) {
+	if r.Method != http.MethodGet && r.Method != http.MethodHead {
+		w.Header().Set("Allow", "GET, HEAD")
+		http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+	if identityStore == nil {
+		http.NotFound(w, r)
+		return
+	}
+	data, ext, ok := identityStore.Icon()
+	if !ok {
+		http.NotFound(w, r)
+		return
+	}
+	contentType := mime.TypeByExtension(ext)
+	if contentType == "" {
+		contentType = "application/octet-stream"
+	}
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("Cache-Control", "no-store")
+	// Explicit Content-Length keeps net/http from switching to
+	// Transfer-Encoding: chunked, which it otherwise does automatically once
+	// a single Write() exceeds its small internal sniff buffer (true for
+	// basically any real icon, easily hundreds of KB) -- the desktop
+	// client's same-port fetch is a hand-rolled raw-socket HTTP/1.1 parser
+	// (see FetchServerIcon in owpengram_servers.cpp), not a real HTTP
+	// client, and has no chunked-decoding logic: it would otherwise treat
+	// the chunk-size-prefixed framing as image bytes and fail to decode.
+	w.Header().Set("Content-Length", strconv.Itoa(len(data)))
+	if r.Method == http.MethodHead {
+		return
+	}
+	_, _ = w.Write(data)
+}

internal/mtprotoedge/server_info_http_test.go

@@ -0,0 +1,105 @@
+package mtprotoedge
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"telesrv/internal/identity"
+)
+
+func TestServeServerInfoIncludesIdentity(t *testing.T) {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		t.Fatal(err)
+	}
+	pem := rsaPublicKeyPEM(key)
+
+	store := identity.NewStore(t.TempDir())
+	if err := store.SetText("OwpenGram", "A self-hosted server."); err != nil {
+		t.Fatal(err)
+	}
+
+	fallback := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { http.NotFound(w, r) })
+	h := serverInfoHTTPHandler(fallback, 2, pem, store)
+
+	req := httptest.NewRequest(http.MethodGet, ServerInfoPath, nil)
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d", rec.Code)
+	}
+	var resp ServerInfoResponse
+	if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
+		t.Fatal(err)
+	}
+	if resp.Name != "OwpenGram" || resp.Description != "A self-hosted server." {
+		t.Fatalf("got %+v", resp)
+	}
+	if resp.HasIcon {
+		t.Fatal("has_icon should be false before any upload")
+	}
+}
+
+func TestServeServerInfoWithoutIdentityStore(t *testing.T) {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		t.Fatal(err)
+	}
+	pem := rsaPublicKeyPEM(key)
+
+	fallback := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { http.NotFound(w, r) })
+	h := serverInfoHTTPHandler(fallback, 2, pem, nil)
+
+	req := httptest.NewRequest(http.MethodGet, ServerInfoPath, nil)
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d", rec.Code)
+	}
+	var resp ServerInfoResponse
+	if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
+		t.Fatal(err)
+	}
+	if resp.Name != "" || resp.Description != "" || resp.HasIcon {
+		t.Fatalf("expected empty identity fields when store is nil, got %+v", resp)
+	}
+	if resp.RSAPublicKeyPEM == "" {
+		t.Fatal("RSA key should still serve when identity store is nil")
+	}
+}
+
+func TestServeServerIcon(t *testing.T) {
+	store := identity.NewStore(t.TempDir())
+	fallback := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { http.NotFound(w, r) })
+	h := serverInfoHTTPHandler(fallback, 2, []byte("pem"), store)
+
+	// No icon configured yet -> 404.
+	req := httptest.NewRequest(http.MethodGet, ServerIconPath, nil)
+	rec := httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	if rec.Code != http.StatusNotFound {
+		t.Fatalf("status = %d, want 404 before upload", rec.Code)
+	}
+
+	png := []byte{0x89, 'P', 'N', 'G', 1, 2, 3, 4}
+	if err := store.SetIcon(png, ".png"); err != nil {
+		t.Fatal(err)
+	}
+
+	req = httptest.NewRequest(http.MethodGet, ServerIconPath, nil)
+	rec = httptest.NewRecorder()
+	h.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("status = %d", rec.Code)
+	}
+	if rec.Body.String() != string(png) {
+		t.Fatal("icon body mismatch")
+	}
+	if ct := rec.Header().Get("Content-Type"); ct != "image/png" {
+		t.Fatalf("Content-Type = %q", ct)
+	}
+}

internal/procctl/admin_restart_test.go

@@ -0,0 +1,35 @@
+package procctl
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestHandlePendingAdminRestartNoop(t *testing.T) {
+	m := NewManager(t.TempDir())
+	restarted, err := m.HandlePendingAdminRestart(context.Background())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if restarted {
+		t.Fatal("expected no-op when no restart was requested")
+	}
+}
+
+func TestHandlePendingAdminRestartFlagRoundTrip(t *testing.T) {
+	dir := t.TempDir()
+	statePath := filepath.Join(dir, stateFileName)
+	if err := os.WriteFile(statePath, []byte(`{"server_pid":123,"admin_pid":0,"pending_admin_restart":true}`), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	m := NewManager(dir)
+	st := m.loadState()
+	if !st.PendingAdminRestart {
+		t.Fatal("expected PendingAdminRestart to round-trip from JSON")
+	}
+	if st.ServerPID != 123 {
+		t.Fatalf("ServerPID = %d, want 123 (existing fields must survive)", st.ServerPID)
+	}
+}

internal/procctl/env_test.go

@@ -0,0 +1,135 @@
+package procctl
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+// findRepoRoot walks up from the test's working directory looking for
+// .env.example -- the same file server-panel.py parses -- so this test
+// exercises the real file, not a synthetic fixture that could drift from it.
+func findRepoRoot(t *testing.T) string {
+	t.Helper()
+	dir, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for {
+		if _, err := os.Stat(filepath.Join(dir, ".env.example")); err == nil {
+			return dir
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			t.Fatal(".env.example not found above test directory")
+		}
+		dir = parent
+	}
+}
+
+func TestReadEnvGroupsParsesRealTemplate(t *testing.T) {
+	root := findRepoRoot(t)
+	m := NewManager(root)
+	groups, err := m.ReadEnvGroups()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(groups) == 0 {
+		t.Fatal("expected at least one group from .env.example")
+	}
+	found := map[string]bool{}
+	for _, g := range groups {
+		if g.Title == "" {
+			t.Errorf("group with empty title, description=%q", g.Description)
+		}
+		if len(g.Fields) == 0 {
+			t.Errorf("group %q has no fields", g.Title)
+		}
+		for _, f := range g.Fields {
+			if !strings.HasPrefix(f.Key, "TELESRV_") {
+				t.Errorf("field key %q missing TELESRV_ prefix", f.Key)
+			}
+			found[f.Key] = true
+		}
+	}
+	// A couple of fields we know exist in the real file (checked above) --
+	// pins the parser to the actual format, not just "produces something".
+	for _, key := range []string{"TELESRV_LISTEN", "TELESRV_ADVERTISE_IP", "TELESRV_DC"} {
+		if !found[key] {
+			t.Errorf("expected field %s in parsed groups", key)
+		}
+	}
+	// The advanced/internal-tuning section (after the "# ===..." banner) is
+	// deliberately excluded -- mirrors server-panel.py's parse_env_template.
+	if found["TELESRV_MTPROTO_RPC_MAX_INFLIGHT"] {
+		t.Error("advanced/internal field leaked into panel-visible groups")
+	}
+}
+
+func TestWriteEnvValuesRoundTrip(t *testing.T) {
+	root := findRepoRoot(t)
+	tmpl, err := os.ReadFile(filepath.Join(root, ".env.example"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	dir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(dir, ".env.example"), tmpl, 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	m := NewManager(dir)
+	groups, err := m.ReadEnvGroups()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(groups) == 0 {
+		t.Fatal("no groups parsed")
+	}
+
+	if err := m.WriteEnvValues(map[string]string{
+		"TELESRV_ADVERTISE_IP": "203.0.113.5",
+		"TELESRV_DC":           "3",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	groups2, err := m.ReadEnvGroups()
+	if err != nil {
+		t.Fatal(err)
+	}
+	values := map[string]string{}
+	for _, g := range groups2 {
+		for _, f := range g.Fields {
+			values[f.Key] = f.Value
+		}
+	}
+	if values["TELESRV_ADVERTISE_IP"] != "203.0.113.5" {
+		t.Errorf("TELESRV_ADVERTISE_IP = %q, want 203.0.113.5", values["TELESRV_ADVERTISE_IP"])
+	}
+	if values["TELESRV_DC"] != "3" {
+		t.Errorf("TELESRV_DC = %q, want 3", values["TELESRV_DC"])
+	}
+	// A field never touched by WriteEnvValues should still read back its
+	// template default -- confirms the file's other lines/comments/layout
+	// survived the rewrite untouched.
+	if values["TELESRV_LISTEN"] == "" {
+		t.Error("TELESRV_LISTEN lost its default after an unrelated field was written")
+	}
+
+	envPath := filepath.Join(dir, ".env")
+	envData, err := os.ReadFile(envPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(envData), "TELESRV_ADVERTISE_IP=203.0.113.5") {
+		t.Error(".env does not contain the written value verbatim")
+	}
+	// The file's descriptive comments (the reason server-panel.py rewrites
+	// from the template instead of dumping bare key=value pairs) must
+	// survive too.
+	if !strings.Contains(string(envData), "Your server's public IP address.") {
+		t.Error(".env lost .env.example's comment lines on write")
+	}
+}

internal/procctl/procctl.go

@@ -0,0 +1,581 @@
+// Package procctl mirrors the process-management half of tui-panel/
+// server-panel.py (git pull, go build, launch/stop, and the shared
+// .server_panel.json PID state file) so the admin web panel can offer the
+// same Restart/Update actions the TUI already has, without requiring an
+// operator to SSH in and use the TUI for that specifically.
+//
+// Restart/Update never restart the admin binary themselves (the process
+// this code typically runs inside, when called from cmd/telesrv-admin) --
+// self-restarting mid-HTTP-request is a materially different, riskier
+// problem (dropped response, no clean signal to the caller that it actually
+// completed) than the TUI's case, where a human is watching an interactive
+// session and re-exec is transparent. Instead they set
+// State.PendingAdminRestart and let the *next* owpengram-server process
+// pick it up via HandlePendingAdminRestart once it's confirmed serving
+// (cmd/telesrv/main.go's OnServing hook) -- that process is unrelated to
+// whatever admin panel is currently running, so it can safely kill the old
+// admin PID and launch a new one with none of the self-restart risk.
+package procctl
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const stateFileName = ".server_panel.json"
+
+// Manager operates on one repo checkout (Root), the same layout
+// tui-panel/server-panel.py expects: bin/, logs/, .env, .env.example, and
+// .server_panel.json at the root.
+type Manager struct {
+	Root string
+}
+
+func NewManager(root string) *Manager {
+	return &Manager{Root: root}
+}
+
+func (m *Manager) serverExe() string {
+	if runtime.GOOS == "windows" {
+		return filepath.Join(m.Root, "bin", "owpengram-server.exe")
+	}
+	return filepath.Join(m.Root, "bin", "owpengram-server")
+}
+
+func (m *Manager) adminExe() string {
+	if runtime.GOOS == "windows" {
+		return filepath.Join(m.Root, "bin", "owpengram-admin-panel.exe")
+	}
+	return filepath.Join(m.Root, "bin", "owpengram-admin-panel")
+}
+
+func (m *Manager) serverLog() string { return filepath.Join(m.Root, "logs", "owpengram-server.log") }
+func (m *Manager) adminLog() string {
+	return filepath.Join(m.Root, "logs", "owpengram-admin-panel.log")
+}
+
+// --- state file (shared with tui-panel/server-panel.py) --------------------
+
+type State struct {
+	ServerPID     int    `json:"server_pid"`
+	AdminPID      int    `json:"admin_pid"`
+	DockerProject string `json:"docker_project"`
+	DockerPrefix  string `json:"docker_prefix"`
+	// PendingAdminRestart is how Restart/Update ask the *next*
+	// owpengram-server process to bounce the admin panel for them, instead
+	// of the admin panel trying to restart itself mid-HTTP-request (see the
+	// package doc). Set here, consumed by HandlePendingAdminRestart at the
+	// new owpengram-server's startup. server-panel.py doesn't know this key
+	// exists -- its own save_state() overwrites the file with only its 4
+	// original fields, so a Stop/Start/Restart/Update run from the TUI in
+	// the narrow window before the flag is consumed will silently drop it.
+	// Rare, and the only consequence is the admin panel not restarting that
+	// one time -- not worth coordinating two processes' writes over.
+	PendingAdminRestart bool `json:"pending_admin_restart,omitempty"`
+}
+
+func (m *Manager) loadState() State {
+	var st State
+	data, err := os.ReadFile(filepath.Join(m.Root, stateFileName))
+	if err != nil {
+		return st
+	}
+	_ = json.Unmarshal(data, &st)
+	if st.DockerProject == "" {
+		st.DockerProject = "owpengram"
+	}
+	if st.DockerPrefix == "" {
+		st.DockerPrefix = "owpengram"
+	}
+	return st
+}
+
+func (m *Manager) saveState(st State) error {
+	data, err := json.Marshal(st)
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(filepath.Join(m.Root, stateFileName), data, 0o644)
+}
+
+// Status reports whether the server/admin PIDs recorded in the shared state
+// file are still alive.
+type Status struct {
+	ServerPID   int
+	ServerAlive bool
+	AdminPID    int
+	AdminAlive  bool
+}
+
+func (m *Manager) Status() Status {
+	st := m.loadState()
+	return Status{
+		ServerPID:   st.ServerPID,
+		ServerAlive: pidAlive(st.ServerPID),
+		AdminPID:    st.AdminPID,
+		AdminAlive:  pidAlive(st.AdminPID),
+	}
+}
+
+// --- process control ---------------------------------------------------
+
+func pidAlive(pid int) bool {
+	if pid <= 0 {
+		return false
+	}
+	if runtime.GOOS == "windows" {
+		out, err := exec.Command("tasklist", "/FI", fmt.Sprintf("PID eq %d", pid)).Output()
+		if err != nil {
+			return false
+		}
+		return strings.Contains(string(out), strconv.Itoa(pid))
+	}
+	return exec.Command("kill", "-0", strconv.Itoa(pid)).Run() == nil
+}
+
+// killPID mirrors kill_pid() in server-panel.py, MINUS its "/T" tree-kill on
+// Windows -- deliberately different here, not an oversight. server-panel.py
+// is always the common parent of both the server and admin processes, so
+// tree-killing one PID never touches the other. This package's callers are
+// not: HandlePendingAdminRestart runs *inside* the freshly launched
+// owpengram-server, which was itself spawned as a child of the *old*
+// owpengram-admin-panel process by the Restart/Update call that got it
+// here. Killing that old admin PID with "/T" would tree-kill its entire
+// descendant chain -- including this very owpengram-server process, since
+// it's a child of the PID being killed. Windows' taskkill walks that chain
+// by recorded parent-PID regardless of any process-group flags on launch,
+// so the only reliable fix is to never tree-kill here: exact-PID kill only,
+// since every process this package launches is started directly via
+// exec.Command (no intermediate shell wrapper), so there's no wrapper-spawned
+// grandchild "/T" would need to catch anyway.
+func killPID(pid int) {
+	if pid <= 0 {
+		return
+	}
+	if runtime.GOOS == "windows" {
+		_ = exec.Command("taskkill", "/PID", strconv.Itoa(pid), "/F").Run()
+		return
+	}
+	_ = exec.Command("kill", "-TERM", strconv.Itoa(pid)).Run()
+	time.Sleep(time.Second)
+	_ = exec.Command("kill", "-KILL", strconv.Itoa(pid)).Run()
+}
+
+// launch starts exePath detached, cwd=Root, stdout/stderr appended to
+// logPath, and returns its PID. Unlike the Python TUI this does not set a
+// new session/process group (that needs OS-specific SysProcAttr) -- started
+// via Start() (not Run()), the child outlives this function's return either
+// way, which is all a request/response HTTP handler needs.
+func (m *Manager) launch(exePath, logPath string) (int, error) {
+	if err := os.MkdirAll(filepath.Dir(logPath), 0o755); err != nil {
+		return 0, fmt.Errorf("mkdir logs: %w", err)
+	}
+	logf, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
+	if err != nil {
+		return 0, fmt.Errorf("open log: %w", err)
+	}
+	defer logf.Close()
+	cmd := exec.Command(exePath)
+	cmd.Dir = m.Root
+	cmd.Stdout = logf
+	cmd.Stderr = logf
+	cmd.Stdin = nil
+	if err := cmd.Start(); err != nil {
+		return 0, fmt.Errorf("start %s: %w", exePath, err)
+	}
+	go func() { _ = cmd.Wait() }() // reap so it doesn't linger as a zombie
+	return cmd.Process.Pid, nil
+}
+
+// --- Docker infrastructure (Postgres/Redis/MinIO) -------------------------
+
+const (
+	postgresWaitTimeout  = 60 * time.Second
+	postgresWaitInterval = 2 * time.Second
+)
+
+// ensureDocker mirrors server-panel.py's START_STEPS "docker" + "postgres"
+// steps -- `docker compose up -d` then wait for Postgres to answer
+// pg_isready. Restart/Update run this every time, same as the TUI: it's a
+// no-op when the containers are already up (compose up -d on a running
+// stack just confirms state), but skipping it entirely was the actual bug
+// report this addresses -- a Restart/Update landing while Postgres/Redis/
+// MinIO are down (host reboot, containers manually stopped, etc.) would
+// otherwise relaunch owpengram-server straight into a DB-connect failure
+// with no clear signal why, instead of surfacing "Postgres not ready" here.
+func (m *Manager) ensureDocker(ctx context.Context, st State) (string, error) {
+	composeFile := filepath.Join(m.Root, "deploy", "docker-compose.yml")
+	if _, err := os.Stat(composeFile); os.IsNotExist(err) {
+		return "", nil
+	}
+
+	cmd := exec.CommandContext(ctx, "docker", "compose", "-f", composeFile, "up", "-d")
+	cmd.Dir = m.Root
+	cmd.Env = append(os.Environ(),
+		"TELESRV_DOCKER_PROJECT="+st.DockerProject,
+		"TELESRV_DOCKER_PREFIX="+st.DockerPrefix,
+	)
+	out, err := cmd.CombinedOutput()
+	log := "$ docker compose up -d\n" + string(out)
+	if err != nil {
+		return log, fmt.Errorf("docker compose up failed: %w", err)
+	}
+
+	deadline := time.Now().Add(postgresWaitTimeout)
+	for {
+		pgCmd := exec.CommandContext(ctx, "docker", "exec", st.DockerPrefix+"-postgres", "pg_isready", "-U", "telesrv", "-d", "telesrv")
+		if pgCmd.Run() == nil {
+			return log + "\nPostgreSQL ready\n", nil
+		}
+		if time.Now().After(deadline) {
+			return log, fmt.Errorf("PostgreSQL not ready after %s", postgresWaitTimeout)
+		}
+		select {
+		case <-ctx.Done():
+			return log, ctx.Err()
+		case <-time.After(postgresWaitInterval):
+		}
+	}
+}
+
+// --- build steps ---------------------------------------------------------
+
+// GitPull runs `git pull --ff-only`, deliberately never a real merge -- see
+// the identical reasoning in server-panel.py's git_pull().
+func (m *Manager) GitPull(ctx context.Context) (string, error) {
+	cmd := exec.CommandContext(ctx, "git", "pull", "--ff-only")
+	cmd.Dir = m.Root
+	out, err := cmd.CombinedOutput()
+	log := "$ git pull --ff-only\n" + string(out)
+	return log, err
+}
+
+// buildServer builds only bin/owpengram-server.
+func (m *Manager) buildServer(ctx context.Context) (string, error) {
+	return m.goBuild(ctx, m.serverExe(), "./cmd/telesrv")
+}
+
+// buildBoth builds bin/owpengram-server and bin/owpengram-admin-panel, like
+// server-panel.py's build(). Used by Update, which leaves a fresh admin
+// binary on disk even though it doesn't self-restart into it (see package
+// doc).
+func (m *Manager) buildBoth(ctx context.Context) (string, error) {
+	serverLog, err := m.buildServer(ctx)
+	if err != nil {
+		return serverLog, err
+	}
+	adminLog, err := m.goBuild(ctx, m.adminExe(), "./cmd/telesrv-admin")
+	return serverLog + "\n" + adminLog, err
+}
+
+func (m *Manager) goBuild(ctx context.Context, outPath, pkg string) (string, error) {
+	if err := os.MkdirAll(filepath.Dir(outPath), 0o755); err != nil {
+		return "", fmt.Errorf("mkdir bin: %w", err)
+	}
+	cmd := exec.CommandContext(ctx, "go", "build", "-o", outPath, pkg)
+	cmd.Dir = m.Root
+	out, err := cmd.CombinedOutput()
+	return fmt.Sprintf("$ go build -o %s %s\n%s", filepath.Base(outPath), pkg, string(out)), err
+}
+
+// --- high-level actions ----------------------------------------------------
+
+// Restart rebuilds and relaunches only bin/owpengram-server (the MTProto
+// data-plane process) -- never the admin binary currently handling this
+// request. Returns a combined build/relaunch log for the admin UI.
+func (m *Manager) Restart(ctx context.Context) (string, error) {
+	st := m.loadState()
+	if pidAlive(st.ServerPID) {
+		killPID(st.ServerPID)
+	}
+	dockerLog, err := m.ensureDocker(ctx, st)
+	if err != nil {
+		return dockerLog, err
+	}
+	buildLog, err := m.buildServer(ctx)
+	fullLog := dockerLog + "\n" + buildLog
+	if err != nil {
+		return fullLog, fmt.Errorf("build failed: %w", err)
+	}
+	pid, err := m.launch(m.serverExe(), m.serverLog())
+	if err != nil {
+		return fullLog, fmt.Errorf("launch failed: %w", err)
+	}
+	st.ServerPID = pid
+	// Ask the process we just launched to bounce the admin panel for us
+	// once it's up -- see HandlePendingAdminRestart's doc comment for why
+	// that's the safe side of this handoff to do it from.
+	st.PendingAdminRestart = true
+	if err := m.saveState(st); err != nil {
+		return fullLog, fmt.Errorf("save state: %w", err)
+	}
+	return fullLog + fmt.Sprintf("\nowpengram-server relaunched, pid=%d. Admin panel will restart shortly.\n", pid), nil
+}
+
+// Update runs git pull, ensures Docker infrastructure is up, rebuilds both
+// binaries, then does the same server-only relaunch as Restart -- including
+// asking that new process to bounce the admin panel too, now onto its
+// freshly built binary.
+func (m *Manager) Update(ctx context.Context) (string, error) {
+	pullLog, err := m.GitPull(ctx)
+	if err != nil {
+		return pullLog, fmt.Errorf("git pull failed: %w", err)
+	}
+	st := m.loadState()
+	if pidAlive(st.ServerPID) {
+		killPID(st.ServerPID)
+	}
+	dockerLog, err := m.ensureDocker(ctx, st)
+	fullLog := pullLog + "\n" + dockerLog
+	if err != nil {
+		return fullLog, err
+	}
+	buildLog, err := m.buildBoth(ctx)
+	fullLog = fullLog + "\n" + buildLog
+	if err != nil {
+		return fullLog, fmt.Errorf("build failed: %w", err)
+	}
+	pid, err := m.launch(m.serverExe(), m.serverLog())
+	if err != nil {
+		return fullLog, fmt.Errorf("launch failed: %w", err)
+	}
+	st.ServerPID = pid
+	st.PendingAdminRestart = true
+	if err := m.saveState(st); err != nil {
+		return fullLog, fmt.Errorf("save state: %w", err)
+	}
+	return fullLog + fmt.Sprintf("\nowpengram-server relaunched, pid=%d. Admin panel will restart shortly onto its freshly built binary.\n", pid), nil
+}
+
+// HandlePendingAdminRestart is called once by owpengram-server itself, right
+// after it confirms it's up and serving (see cmd/telesrv/main.go's
+// OnServing hook) -- never by the admin panel on itself. That ordering is
+// the whole point: by the time this runs, the *new* owpengram-server
+// process already exists and is unrelated to whatever admin panel process
+// is currently running, so killing the old admin PID and launching a new
+// one here carries none of the risk self-restarting mid-HTTP-request would
+// (see the package doc). A no-op when no restart was requested.
+func (m *Manager) HandlePendingAdminRestart(ctx context.Context) (bool, error) {
+	st := m.loadState()
+	if !st.PendingAdminRestart {
+		return false, nil
+	}
+	if pidAlive(st.AdminPID) {
+		killPID(st.AdminPID)
+	}
+	pid, err := m.launch(m.adminExe(), m.adminLog())
+	if err != nil {
+		return false, fmt.Errorf("launch admin panel: %w", err)
+	}
+	st.AdminPID = pid
+	st.PendingAdminRestart = false
+	if err := m.saveState(st); err != nil {
+		return true, fmt.Errorf("save state: %w", err)
+	}
+	return true, nil
+}
+
+// --- .env.example / .env editing -------------------------------------------
+
+var (
+	activeFieldRe    = regexp.MustCompile(`^(TELESRV_[A-Z0-9_]+)=(.*)$`)
+	commentedFieldRe = regexp.MustCompile(`^#\s*(TELESRV_[A-Z0-9_]+)=(.*)$`)
+	sensitiveKeyRe   = regexp.MustCompile(`(PASSWORD|SECRET|_TOKEN|API_KEY)`)
+	groupHeaderRe    = regexp.MustCompile(`^##\s*(.+?)\s*--\s*(.+)$`)
+	sectionBreakRe   = regexp.MustCompile(`^#\s*={10,}\s*$`)
+)
+
+type EnvField struct {
+	Key              string `json:"key"`
+	DefaultValue     string `json:"default_value"`
+	Description      string `json:"description"`
+	EnabledByDefault bool   `json:"enabled_by_default"`
+	Sensitive        bool   `json:"sensitive"`
+	// Value is the field's current effective value: from .env when set,
+	// otherwise DefaultValue (only when EnabledByDefault), else empty --
+	// exactly current_env_values()'s semantics in server-panel.py.
+	Value string `json:"value"`
+}
+
+type EnvGroup struct {
+	Title       string     `json:"title"`
+	Description string     `json:"description"`
+	Fields      []EnvField `json:"fields"`
+}
+
+// ReadEnvGroups parses .env.example into the same panel-visible groups
+// server-panel.py's parse_env_template() does (identical header/format
+// rules -- see that function's docstring), then fills in each field's
+// current effective value from .env.
+func (m *Manager) ReadEnvGroups() ([]EnvGroup, error) {
+	tmplPath := filepath.Join(m.Root, ".env.example")
+	tmplData, err := os.ReadFile(tmplPath)
+	if os.IsNotExist(err) {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, fmt.Errorf("read .env.example: %w", err)
+	}
+	envValues, err := m.readEnvFile()
+	if err != nil {
+		return nil, err
+	}
+
+	var groups []EnvGroup
+	var current *EnvGroup
+	var pending []string
+	inCommentRun := false
+	seen := map[string]bool{}
+
+	appendField := func(key, defaultValue, description string, enabledByDefault bool) {
+		if current == nil || seen[key] {
+			return
+		}
+		seen[key] = true
+		value, has := envValues[key]
+		if !has {
+			if enabledByDefault {
+				value = defaultValue
+			} else {
+				value = ""
+			}
+		}
+		current.Fields = append(current.Fields, EnvField{
+			Key:              key,
+			DefaultValue:     defaultValue,
+			Description:      description,
+			EnabledByDefault: enabledByDefault,
+			Sensitive:        sensitiveKeyRe.MatchString(key),
+			Value:            value,
+		})
+	}
+
+	for _, raw := range strings.Split(string(tmplData), "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" {
+			pending = nil
+			inCommentRun = false
+			continue
+		}
+		if h := groupHeaderRe.FindStringSubmatch(line); h != nil {
+			groups = append(groups, EnvGroup{Title: strings.TrimSpace(h[1]), Description: strings.TrimSpace(h[2])})
+			current = &groups[len(groups)-1]
+			pending = nil
+			inCommentRun = false
+			continue
+		}
+		if sectionBreakRe.MatchString(line) {
+			current = nil
+			pending = nil
+			inCommentRun = false
+			continue
+		}
+		if a := activeFieldRe.FindStringSubmatch(line); a != nil {
+			appendField(a[1], a[2], strings.Join(pending, " "), true)
+			inCommentRun = false
+			continue
+		}
+		if strings.HasPrefix(line, "#") {
+			if c := commentedFieldRe.FindStringSubmatch(line); c != nil {
+				appendField(c[1], c[2], strings.Join(pending, " "), false)
+				inCommentRun = false
+				continue
+			}
+			text := strings.TrimSpace(strings.TrimLeft(line, "#"))
+			if inCommentRun {
+				pending = append(pending, text)
+			} else {
+				pending = []string{text}
+			}
+			inCommentRun = true
+			continue
+		}
+		inCommentRun = false
+	}
+
+	out := groups[:0]
+	for _, g := range groups {
+		if len(g.Fields) > 0 {
+			out = append(out, g)
+		}
+	}
+	return out, nil
+}
+
+func (m *Manager) readEnvFile() (map[string]string, error) {
+	values := map[string]string{}
+	data, err := os.ReadFile(filepath.Join(m.Root, ".env"))
+	if os.IsNotExist(err) {
+		return values, nil
+	}
+	if err != nil {
+		return nil, fmt.Errorf("read .env: %w", err)
+	}
+	for _, raw := range strings.Split(string(data), "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		idx := strings.IndexByte(line, '=')
+		if idx <= 0 {
+			continue
+		}
+		values[line[:idx]] = strings.TrimSpace(line[idx+1:])
+	}
+	return values, nil
+}
+
+// WriteEnvValues rewrites .env from .env.example's exact text, substituting
+// each known key's value in place -- see save_env()'s docstring in
+// server-panel.py for why this (not a fresh key=value dump) is what
+// preserves comments/layout. Only keys present in values are touched; a
+// template-commented optional field is uncommented when given a non-empty
+// value and left as-is when given an empty one.
+func (m *Manager) WriteEnvValues(values map[string]string) error {
+	tmplPath := filepath.Join(m.Root, ".env.example")
+	tmplData, err := os.ReadFile(tmplPath)
+	if err != nil {
+		return fmt.Errorf("read .env.example: %w", err)
+	}
+	lines := strings.Split(string(tmplData), "\n")
+	// Split() on a trailing "\n" leaves one empty trailing element; drop it
+	// so the join below doesn't add a spurious blank line before the final
+	// newline this function appends anyway.
+	if len(lines) > 0 && lines[len(lines)-1] == "" {
+		lines = lines[:len(lines)-1]
+	}
+	out := make([]string, 0, len(lines))
+	seen := map[string]bool{}
+	for _, raw := range lines {
+		line := strings.TrimSpace(raw)
+		if a := activeFieldRe.FindStringSubmatch(line); a != nil {
+			if v, ok := values[a[1]]; ok && !seen[a[1]] {
+				seen[a[1]] = true
+				out = append(out, a[1]+"="+v)
+				continue
+			}
+		}
+		if c := commentedFieldRe.FindStringSubmatch(line); c != nil {
+			if v, ok := values[c[1]]; ok && !seen[c[1]] {
+				seen[c[1]] = true
+				if v != "" {
+					out = append(out, c[1]+"="+v)
+				} else {
+					out = append(out, raw)
+				}
+				continue
+			}
+		}
+		out = append(out, raw)
+	}
+	return os.WriteFile(filepath.Join(m.Root, ".env"), []byte(strings.Join(out, "\n")+"\n"), 0o644)
+}