feat(admin): add SMTP fixes, account drilldown, admin password resets

[compgeniuses]

Implement full admin page improvements including:

• Fix EACCES permission errors in Docker/non-root environments by storing SMTP config in the database with best-effort env sync and warnings for write failures
• Add database-backed SMTP configuration with env fallback, async resolution, and transporter cache reset
• Add account detail drilldown to view per-account businesses and user memberships
• Add admin-initiated password reset with token generation and proper error handling
• Update email logging to include error details in logs and API responses
• Refactor local auth to use async SMTP checks and shared password reset helpers
• Add comprehensive test suite for new admin procedures
• Update test config to use a deterministic super-admin account for testing
• Add opencode tracking files for mission progress, work logs, and task tracking

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.

Fixes #(issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor (no functional changes)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Unit tests
• Integration tests
• End-to-end tests
• Manual testing

Test Configuration:

• Node.js version:
• PostgreSQL version:
• OS:

Checklist:

• My code follows the project's code style
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

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Additional context:

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