Bug Fixes
- auto-move linked lead to PROPOSAL_SENT on proposal create
- clarify success toast that draft awaits explicit Send action
- create non-internal proposals as DRAFT for preview-before-send
- invalidate leads cache when proposal is rejected
- invalidate leads query after sending notification
- promote linked lead to PROPOSAL_SENT when publishing a draft
- refresh leads board after creating a proposal
- rename submit button to Preview Proposal to match draft-first flow
- drop hoverExpand and add tooltips to footer footer icons
- remove hover-to-expand and SSR collapsible flash from sidebar
Features
- add migration for PROPOSAL_SENT lead status
- add Proposal Sent kanban column with empty state
- add PROPOSAL_SENT to LeadStatus enum
- render View Proposal and Mark as Lost actions for PROPOSAL_SENT leads
- surface PROPOSAL_SENT in lead grid status filter and actions
- auto-convert linked lead when client signs proposal

