feat(FN-2585): remove top-level remote access toggle

- Remove the standalone remoteEnabled setting from CLI, core settings defaults/types, and dashboard settings APIs/UI
- Treat remote access as enabled when an active provider is selected and that provider is configured as enabled
- Update remote auth and engine lifecycle checks to gate on provider activation instead of a global flag
- Adjust tests and add a changeset documenting the remote access configuration simplification

packages/cli/src/commands/dashboard-tui/__tests__/app.test.tsx

@@ -34,7 +34,7 @@ function makeInteractiveData(opts: {
   models?: ModelItem[];
   taskDetail?: TaskDetailData | null;
   remote?: Partial<{
-    getSettings: () => Promise<{ remoteEnabled: boolean; activeProvider: "tailscale" | "cloudflare" | null; tailscaleEnabled: boolean; cloudflareEnabled: boolean; shortLivedEnabled: boolean; shortLivedTtlMs: number }>;
+    getSettings: () => Promise<{ activeProvider: "tailscale" | "cloudflare" | null; tailscaleEnabled: boolean; cloudflareEnabled: boolean; shortLivedEnabled: boolean; shortLivedTtlMs: number }>;
     getStatus: () => Promise<{ provider: "tailscale" | "cloudflare" | null; state: "stopped" | "starting" | "running" | "error"; url: string | null; lastError: string | null }>;
     activateProvider: (provider: "tailscale" | "cloudflare") => Promise<void>;
     startTunnel: () => Promise<void>;
@@ -58,7 +58,6 @@ function makeInteractiveData(opts: {
     pollIntervalMs: 60000,
     enginePaused: false,
     globalPause: false,
-    remoteEnabled: false,
     remoteActiveProvider: null,
     remoteShortLivedEnabled: false,
     remoteShortLivedTtlMs: 900000,
@@ -66,7 +65,6 @@ function makeInteractiveData(opts: {
   const models = opts.models ?? [];
   const remoteDefaults = {
     getSettings: async () => ({
-      remoteEnabled: settings.remoteEnabled,
       activeProvider: settings.remoteActiveProvider,
       tailscaleEnabled: true,
       cloudflareEnabled: true,
@@ -353,7 +351,6 @@ describe("Settings view", () => {
       pollIntervalMs: 60000,
       enginePaused: false,
       globalPause: false,
-      remoteEnabled: true,
       remoteActiveProvider: "tailscale",
       remoteShortLivedEnabled: true,
       remoteShortLivedTtlMs: 600000,
@@ -401,7 +398,6 @@ describe("Settings view", () => {
       pollIntervalMs: 60000,
       enginePaused: false,
       globalPause: false,
-      remoteEnabled: true,
       remoteActiveProvider: "cloudflare",
       remoteShortLivedEnabled: true,
       remoteShortLivedTtlMs: 600000,

packages/cli/src/commands/dashboard-tui/app.tsx

@@ -448,7 +448,6 @@ function SettingsPanel({ state, isFocused }: { state: DashboardState; isFocused:
               ["pollMs", `${s.pollIntervalMs}`],
               ["paused", s.enginePaused ? "yes" : "no"],
               ["globalPause", s.globalPause ? "yes" : "no"],
-              ["remoteEnabled", s.remoteEnabled ? "enabled" : "disabled"],
               ["remoteProvider", s.remoteActiveProvider ?? "none"],
               ["remoteState", s.remoteStatus?.state ?? "unknown"],
             ] as Array<[string, string]>
@@ -2105,7 +2104,7 @@ function AgentsView({ state }: { state: DashboardState }) {
 
 // ── Settings interactive view ─────────────────────────────────────────────────
 
-type SettingKey = "maxConcurrent" | "maxWorktrees" | "autoMerge" | "mergeStrategy" | "pollIntervalMs" | "enginePaused" | "globalPause" | "remoteEnabled" | "remoteActiveProvider" | "remoteShortLivedEnabled" | "remoteShortLivedTtlMs";
+type SettingKey = "maxConcurrent" | "maxWorktrees" | "autoMerge" | "mergeStrategy" | "pollIntervalMs" | "enginePaused" | "globalPause" | "remoteActiveProvider" | "remoteShortLivedEnabled" | "remoteShortLivedTtlMs";
 
 interface SettingDef {
   key: SettingKey;
@@ -2122,7 +2121,6 @@ const SETTING_DEFS: SettingDef[] = [
   { key: "pollIntervalMs", label: "Poll Interval (ms)", type: "number" },
   { key: "enginePaused", label: "Engine Paused", type: "boolean" },
   { key: "globalPause", label: "Global Pause", type: "boolean" },
-  { key: "remoteEnabled", label: "Remote Access", type: "boolean" },
   { key: "remoteActiveProvider", label: "Remote Provider", type: "enum", options: ["tailscale", "cloudflare"] },
   { key: "remoteShortLivedEnabled", label: "Short-Lived Tokens", type: "boolean" },
   { key: "remoteShortLivedTtlMs", label: "Short-Lived TTL (ms)", type: "number" },
@@ -2513,8 +2511,6 @@ function SettingsInteractiveView({ state, controller }: { state: DashboardState;
                   <Text color={localSettings.remoteStatus?.state === "running" ? "green" : "yellow"}>{localSettings.remoteStatus?.state ?? "unknown"}</Text>
                 </Box>
                 <Box flexDirection="row" gap={1}>
-                  <Text dimColor>Enabled:</Text>
-                  <Text>{localSettings.remoteSettingsSnapshot?.remoteEnabled ? "yes" : "no"}</Text>
                   <Text dimColor>Short-lived:</Text>
                   <Text>{localSettings.remoteSettingsSnapshot?.shortLivedEnabled ? "on" : "off"}</Text>
                 </Box>

packages/cli/src/commands/dashboard-tui/state.ts

@@ -75,7 +75,6 @@ export interface RemoteQrPayload {
 }
 
 export interface RemoteSettingsSnapshot {
-  remoteEnabled: boolean;
   activeProvider: RemoteProvider | null;
   tailscaleEnabled: boolean;
   cloudflareEnabled: boolean;
@@ -91,7 +90,6 @@ export interface SettingsValues {
   pollIntervalMs: number;
   enginePaused: boolean;
   globalPause: boolean;
-  remoteEnabled: boolean;
   remoteActiveProvider: RemoteProvider | null;
   remoteShortLivedEnabled: boolean;
   remoteShortLivedTtlMs: number;