Cannot use Import Tool with Google Sign-In (no way to set password or export CSV)

# Cannot use Import Tool with Google Sign-In (no password option) + Missing CSV Export

## Problem 1: Import Tool authentication

- [x] Account created via **Google Sign-In**
- [x] No option to set or reset a local password in **Profile → Security**
- [x] `import-tool` requires `--user` and `--password`
- [x] No documented support for OAuth or API tokens

**Result:** Google-only accounts cannot authenticate with the Import Tool.

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## Problem 2: Issue export

- [x] Checked project spaces and issues UI
- [ ] No option to export issues as **CSV/JSON**
- [ ] No documented API for bulk export

**Result:** Impossible to export issues for backup/migration.

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## Expected behavior

- Provide a way for Google-sign-in users to authenticate:
- [ ] Allow setting a local password
- [ ] Or allow Personal Access Tokens / OAuth flow in `import-tool`
- Provide:
- [ ] CSV export option in the UI
- [ ] Or an API endpoint for export

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## Actual behavior

- Import tool fails with Google-only accounts (`no password`).
- No CSV export functionality.

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## Environment

- Import Tool: `hardcoreeng/import-tool:latest`
- OS: Windows 11 (via WSL2)
- Login: Google Sign-In only

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## Request

- Please clarify how Google-only accounts can use the Import Tool.
- Please consider adding issue export (CSV/JSON) to the product roadmap.