Revert "Make auto-upgrade enabled by default, remove activation prompt"

[alfonso-noriega]

Reverts #7341

[github-actions]

Differences in type declarations

We detected differences in the type declarations generated by Typescript for this branch compared to the baseline ('main' branch). Please, review them to ensure they are backward-compatible. Here are some important things to keep in mind:

• Some seemingly private modules might be re-exported through public modules.
• If the branch is behind main you might see odd diffs, rebase main into this branch.

New type declarations

We found no new type declarations in this PR

Existing type declarations

packages/cli-kit/dist/private/node/conf-store.d.ts

@@ -128,11 +128,10 @@ interface RunWithRateLimitOptions {
 export declare function runWithRateLimit(options: RunWithRateLimitOptions, config?: LocalStorage<ConfSchema>): Promise<boolean>;
 /**
  * Get auto-upgrade preference.
- * Defaults to true if the preference has never been explicitly set.
  *
- * @returns Whether auto-upgrade is enabled.
+ * @returns Whether auto-upgrade is enabled, or undefined if never set.
  */
-export declare function getAutoUpgradeEnabled(config?: LocalStorage<ConfSchema>): boolean;
+export declare function getAutoUpgradeEnabled(config?: LocalStorage<ConfSchema>): boolean | undefined;
 /**
  * Set auto-upgrade preference.
  *

packages/cli-kit/dist/public/node/upgrade.d.ts

 import { getAutoUpgradeEnabled, setAutoUpgradeEnabled } from '../../private/node/conf-store.js';
 export { getAutoUpgradeEnabled, setAutoUpgradeEnabled };
 /**
  * Utility function for generating an install command for the user to run
  * to install an updated version of Shopify CLI.
  *
  * @returns A string with the command to run, or undefined if the package manager cannot be determined.
  */
 export declare function cliInstallCommand(): string | undefined;
 /**
  * Runs the CLI upgrade using the appropriate package manager.
  * Determines the install command and executes it.
  *
  * @throws AbortError if the package manager or command cannot be determined.
  */
 export declare function runCLIUpgrade(): Promise<void>;
 /**
  * Returns the version to auto-upgrade to, or undefined if auto-upgrade should be skipped.
- * Auto-upgrade is enabled by default and can be disabled via `setAutoUpgradeEnabled(false)`.
+ * Auto-upgrade is disabled by default and must be enabled via `shopify upgrade`.
  * Also skips for CI, pre-release versions, or when no newer version is available.
  *
  * @returns The version string to upgrade to, or undefined if no upgrade should happen.
  */
 export declare function versionToAutoUpgrade(): string | undefined;
 /**
  * Shows a daily upgrade-available warning for users who have not enabled auto-upgrade.
  * Skipped in CI and for pre-release versions. When auto-upgrade is enabled this is a no-op
  * because the postrun hook will handle the upgrade directly.
  */
 export declare function warnIfUpgradeAvailable(): Promise<void>;
 /**
  * Generates a message to remind the user to update the CLI.
  * For major version bumps, appends a link to the GitHub release notes so users
  * can review breaking changes before deciding to upgrade.
  *
  * @param version - The version to update to.
  * @param isMajor - Whether the version bump is a major version change.
  * @returns The message to remind the user to update the CLI.
  */
 export declare function getOutputUpdateCLIReminder(version: string, isMajor?: boolean): string;
+/**
+ * Prompts the user to enable or disable automatic upgrades, then persists their choice.
+ *
+ * @returns Whether the user chose to enable auto-upgrade.
+ */
+export declare function promptAutoUpgrade(): Promise<boolean>;