fix(ui): handle slack config snapshot

CHANGELOG.md

@@ -35,6 +35,7 @@
 - Heartbeat: make HEARTBEAT_OK ack padding configurable across heartbeat and cron delivery. (#238) — thanks @jalehman
 - WhatsApp: set sender E.164 for direct chats so owner commands work in DMs.
 - Slack: keep auto-replies in the original thread when responding to thread messages. Thanks @scald for PR #251.
+- Control UI: avoid Slack config ReferenceError by reading slack config snapshots. Thanks @sreekaransrinath for PR #249.
 
 ### Maintenance
 - Deps: bump pi-* stack, Slack SDK, discord-api-types, file-type, zod, and Biome.

ui/src/ui/controllers/config.test.ts

@@ -0,0 +1,139 @@
+import { describe, expect, it } from "vitest";
+
+import { applyConfigSnapshot, type ConfigState } from "./config";
+import {
+  defaultDiscordActions,
+  defaultSlackActions,
+  type DiscordForm,
+  type IMessageForm,
+  type SignalForm,
+  type SlackForm,
+  type TelegramForm,
+} from "../ui-types";
+
+const baseTelegramForm: TelegramForm = {
+  token: "",
+  requireMention: true,
+  allowFrom: "",
+  proxy: "",
+  webhookUrl: "",
+  webhookSecret: "",
+  webhookPath: "",
+};
+
+const baseDiscordForm: DiscordForm = {
+  enabled: true,
+  token: "",
+  dmEnabled: true,
+  allowFrom: "",
+  groupEnabled: false,
+  groupChannels: "",
+  mediaMaxMb: "",
+  historyLimit: "",
+  textChunkLimit: "",
+  replyToMode: "off",
+  guilds: [],
+  actions: { ...defaultDiscordActions },
+  slashEnabled: false,
+  slashName: "",
+  slashSessionPrefix: "",
+  slashEphemeral: true,
+};
+
+const baseSlackForm: SlackForm = {
+  enabled: true,
+  botToken: "",
+  appToken: "",
+  dmEnabled: true,
+  allowFrom: "",
+  groupEnabled: false,
+  groupChannels: "",
+  mediaMaxMb: "",
+  textChunkLimit: "",
+  reactionNotifications: "own",
+  reactionAllowlist: "",
+  slashEnabled: false,
+  slashName: "",
+  slashSessionPrefix: "",
+  slashEphemeral: true,
+  actions: { ...defaultSlackActions },
+  channels: [],
+};
+
+const baseSignalForm: SignalForm = {
+  enabled: true,
+  account: "",
+  httpUrl: "",
+  httpHost: "",
+  httpPort: "",
+  cliPath: "",
+  autoStart: true,
+  receiveMode: "",
+  ignoreAttachments: false,
+  ignoreStories: false,
+  sendReadReceipts: false,
+  allowFrom: "",
+  mediaMaxMb: "",
+};
+
+const baseIMessageForm: IMessageForm = {
+  enabled: true,
+  cliPath: "",
+  dbPath: "",
+  service: "auto",
+  region: "",
+  allowFrom: "",
+  includeAttachments: false,
+  mediaMaxMb: "",
+};
+
+function createState(): ConfigState {
+  return {
+    client: null,
+    connected: false,
+    configLoading: false,
+    configRaw: "",
+    configValid: null,
+    configIssues: [],
+    configSaving: false,
+    configSnapshot: null,
+    configSchema: null,
+    configSchemaVersion: null,
+    configSchemaLoading: false,
+    configUiHints: {},
+    configForm: null,
+    configFormDirty: false,
+    configFormMode: "form",
+    lastError: null,
+    telegramForm: { ...baseTelegramForm },
+    discordForm: { ...baseDiscordForm },
+    slackForm: { ...baseSlackForm },
+    signalForm: { ...baseSignalForm },
+    imessageForm: { ...baseIMessageForm },
+    telegramConfigStatus: null,
+    discordConfigStatus: null,
+    slackConfigStatus: null,
+    signalConfigStatus: null,
+    imessageConfigStatus: null,
+  };
+}
+
+describe("applyConfigSnapshot", () => {
+  it("handles missing slack config without throwing", () => {
+    const state = createState();
+    applyConfigSnapshot(state, {
+      config: {
+        telegram: {},
+        discord: {},
+        signal: {},
+        imessage: {},
+      },
+      valid: true,
+      issues: [],
+      raw: "{}",
+    });
+
+    expect(state.slackForm.botToken).toBe("");
+    expect(state.slackForm.actions).toEqual(defaultSlackActions);
+  });
+});

ui/src/ui/controllers/config.ts

@@ -100,6 +100,7 @@ export function applyConfigSnapshot(state: ConfigState, snapshot: ConfigSnapshot
   const config = snapshot.config ?? {};
   const telegram = (config.telegram ?? {}) as Record<string, unknown>;
   const discord = (config.discord ?? {}) as Record<string, unknown>;
+  const slack = (config.slack ?? {}) as Record<string, unknown>;
   const signal = (config.signal ?? {}) as Record<string, unknown>;
   const imessage = (config.imessage ?? {}) as Record<string, unknown>;
   const toList = (value: unknown) =>