Add isolated ViewHook sales pipeline

[awtprod]

Summary

• adds an opt-in sales pipeline feature for Command Center Spaces
• stores prospects, draft requests, and append-only activity in dedicated runtime tables
• adds feature-gated web/desktop kanban and mobile pipeline views
• adds weekday prospect proposal tooling with human-controlled stage transitions
• adds a separate Gmail draft-only connector with digest-bound approval, reconciliation, and duplicate prevention

Safety and rollout

• existing Spaces keep the feature disabled by default
• agents can propose researched prospects but cannot approve outreach, create external drafts, or mark deals won
• Gmail exposes exact draft create/list/get operations only and always retains --gmail-no-send
• outreach is previewed in full and approved before draft creation; sending remains manual in Gmail
• no prospect data is stored in Git

Validation

• affected package type checks: core, contracts, client runtime, server, web, and mobile
• 75 focused server tests
• 18 focused web tests
• 2 focused contract tests
• clean diff and public-repository safety checks