feat(cli): Edit key creation wizard

[brian-lou]

Greptile Summary

This PR upgrades the auth / init wizard in the CLI to let users explicitly choose which type of API key to generate (development, production, or all/both), replacing the previous automatic detection heuristic. It also introduces a centralized apiRequest utility (fetch.ts) that standardises URL construction and shared headers (including a new gt-api-version header) across all credential-related requests.

Key changes:

• New fetch.ts helper: Wraps all CLI→API calls with shared headers (Content-Type, gt-api-version) and a default POST method. Contains an unused generic type parameter T that should be removed.
• credentials.ts refactor: Credentials now carries an ApiKey[] array instead of a single apiKey string, allowing multiple keys to be returned and written in one session. setCredentials no longer requires a type argument; key type is read from each ApiKey object. areCredentialsSet() now accepts either GT_API_KEY or GT_DEV_API_KEY.
• base.ts wizard flow: Auto-detection logic removed; an interactive promptSelect is shown instead. The 'all' option generates both keys in one browser session. The success message uses incorrect plural wording for single-key selections.
• Version bump: 2.6.30 → 2.7.0.

The logic changes are well-scoped and internally consistent. Main items to address: remove the unused generic type parameter, and fix the grammar in the success message.

Confidence Score: 4/5

• This PR is safe to merge with minor polish — an unused generic type and a grammar issue in user-facing text.
• The logic changes are well-scoped, internally consistent, and the new apiRequest helper is straightforward. The credential flow properly supports multiple keys. Two issues remain: an unused TypeScript generic that will generate a compilation warning, and a minor user-facing grammar error in the success message that should be corrected before merge.
• packages/cli/src/utils/fetch.ts (remove unused generic T) and packages/cli/src/cli/base.ts (fix plural/singular in success message)

Sequence Diagram

sequenceDiagram
    participant User
    participant CLI (base.ts)
    participant credentials.ts
    participant fetch.ts (apiRequest)
    participant GT API

    User->>CLI (base.ts): gt auth (or init wizard)
    CLI (base.ts)->>User: promptSelect — key type?
    User-->>CLI (base.ts): development | production | all
    CLI (base.ts)->>credentials.ts: retrieveCredentials(settings, keyType)
    credentials.ts->>fetch.ts (apiRequest): POST /cli/wizard/session {keyType}
    fetch.ts (apiRequest)->>GT API: POST /cli/wizard/session
    GT API-->>fetch.ts (apiRequest): { sessionId }
    fetch.ts (apiRequest)-->>credentials.ts: Response
    credentials.ts->>User: Open browser → dashboard/cli/wizard/:sessionId
    loop Poll every 2 s
        credentials.ts->>fetch.ts (apiRequest): GET /cli/wizard/:sessionId
        fetch.ts (apiRequest)->>GT API: GET /cli/wizard/:sessionId
        GT API-->>fetch.ts (apiRequest): 200 { apiKeys: ApiKey[], projectId }
        fetch.ts (apiRequest)-->>credentials.ts: Response
    end
    credentials.ts->>fetch.ts (apiRequest): DELETE /cli/wizard/:sessionId
    credentials.ts-->>CLI (base.ts): Credentials { apiKeys[], projectId }
    CLI (base.ts)->>credentials.ts: setCredentials(credentials, framework)
    credentials.ts->>credentials.ts: Write GT_PROJECT_ID + GT_DEV_API_KEY / GT_API_KEY to .env.local

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_{Last reviewed commit: 4f413db}

Greptile also left 2 inline comments on this PR.

[greptile-apps]

Unused generic type parameter

The generic type parameter T is declared on the function signature but is never used — the return type is Promise<Response>, not Promise<T>. TypeScript will flag this as an unused type parameter. Either remove it or update the return type to use it:

Suggested change

	export default async function apiRequest<T>(
	export default async function apiRequest(

Prompt To Fix With AI

This is a comment left during a code review.
Path: packages/cli/src/utils/fetch.ts
Line: 10

Comment:
Unused generic type parameter

The generic type parameter `T` is declared on the function signature but is never used — the return type is `Promise<Response>`, not `Promise<T>`. TypeScript will flag this as an unused type parameter. Either remove it or update the return type to use it:

```suggestion
export default async function apiRequest(
```

How can I resolve this? If you propose a fix, please make it concise.

[greptile-apps]

Incorrect plural in success message for single key type

When options.keyType is 'development' or 'production', the message reads e.g. "Done! development keys have been generated..." — but only one key was produced. The phrasing should vary based on whether one or two keys were requested:

Suggested change

	`Done! ${options.keyType} keys have been generated and saved to your .env.local file.`
	`Done! ${options.keyType === 'all' ? 'Development and production keys have' : `A ${options.keyType} key has`} been generated and saved to your .env.local file.`

Prompt To Fix With AI

This is a comment left during a code review.
Path: packages/cli/src/cli/base.ts
Line: 354

Comment:
Incorrect plural in success message for single key type

When `options.keyType` is `'development'` or `'production'`, the message reads e.g. _"Done! development keys have been generated..."_ — but only one key was produced. The phrasing should vary based on whether one or two keys were requested:

```suggestion
          `Done! ${options.keyType === 'all' ? 'Development and production keys have' : `A ${options.keyType} key has`} been generated and saved to your .env.local file.`
```

How can I resolve this? If you propose a fix, please make it concise.