Adds AI-driven conversation tracking to debt negotiation

Introduces comprehensive conversation history with a new table and UI for tracking all negotiation emails, AI analysis, and financial outcomes. Enhances real-time updates, manages negotiation rounds, and supports new statuses for negotiation lifecycle. Integrates AI-powered extraction and response analysis to automate intent detection and outcome calculations, improving transparency and automation of debt resolution.

supabase/migrations/20250607012000_conversation_tracking.sql

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+-- Enhanced conversation tracking and negotiation flow
+-- This migration adds comprehensive conversation tracking and improved status management
+
+-- Create conversation_messages table to track all email exchanges
+CREATE TABLE IF NOT EXISTS conversation_messages (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  debt_id uuid REFERENCES debts(id) ON DELETE CASCADE NOT NULL,
+  message_type text NOT NULL CHECK (message_type IN ('initial_debt', 'negotiation_sent', 'response_received', 'counter_offer', 'acceptance', 'rejection')),
+  direction text NOT NULL CHECK (direction IN ('inbound', 'outbound')),
+  subject text,
+  body text NOT NULL,
+  from_email text,
+  to_email text,
+  message_id text, -- Postmark message ID for outbound, email ID for inbound
+  ai_analysis jsonb DEFAULT '{}'::jsonb, -- AI analysis of the message content
+  created_at timestamptz DEFAULT now(),
+  updated_at timestamptz DEFAULT now()
+);
+
+-- Add indexes for performance
+CREATE INDEX IF NOT EXISTS idx_conversation_messages_debt_id ON conversation_messages(debt_id);
+CREATE INDEX IF NOT EXISTS idx_conversation_messages_created_at ON conversation_messages(created_at);
+CREATE INDEX IF NOT EXISTS idx_conversation_messages_type ON conversation_messages(message_type);
+
+-- Update debts table status constraint to include new statuses
+ALTER TABLE debts 
+DROP CONSTRAINT IF EXISTS debts_status_check;
+
+ALTER TABLE debts 
+ADD CONSTRAINT debts_status_check 
+CHECK (status IN (
+  'received', 
+  'negotiating', 
+  'approved', 
+  'sent', 
+  'awaiting_response',
+  'counter_negotiating', 
+  'accepted', 
+  'rejected',
+  'settled', 
+  'failed', 
+  'opted_out'
+));
+
+-- Add conversation tracking fields to debts table
+ALTER TABLE debts ADD COLUMN IF NOT EXISTS conversation_count integer DEFAULT 0;
+ALTER TABLE debts ADD COLUMN IF NOT EXISTS last_message_at timestamptz DEFAULT now();
+ALTER TABLE debts ADD COLUMN IF NOT EXISTS negotiation_round integer DEFAULT 1;
+ALTER TABLE debts ADD COLUMN IF NOT EXISTS prospected_savings numeric DEFAULT 0;
+ALTER TABLE debts ADD COLUMN IF NOT EXISTS actual_savings numeric DEFAULT 0;
+
+-- Create indexes for new columns
+CREATE INDEX IF NOT EXISTS idx_debts_last_message_at ON debts(last_message_at);
+CREATE INDEX IF NOT EXISTS idx_debts_negotiation_round ON debts(negotiation_round);
+
+-- Enable RLS on conversation_messages
+ALTER TABLE conversation_messages ENABLE ROW LEVEL SECURITY;
+
+-- Add RLS policy for conversation_messages (users can only see their own debt conversations)
+CREATE POLICY "Users can view their own conversation messages" ON conversation_messages
+  FOR SELECT USING (
+    debt_id IN (
+      SELECT id FROM debts WHERE user_id = auth.uid()
+    )
+  );
+
+CREATE POLICY "Users can insert their own conversation messages" ON conversation_messages
+  FOR INSERT WITH CHECK (
+    debt_id IN (
+      SELECT id FROM debts WHERE user_id = auth.uid()
+    )
+  );
+
+-- Enable real-time for conversation_messages
+ALTER PUBLICATION supabase_realtime ADD TABLE conversation_messages;
+
+-- Add comments for documentation
+COMMENT ON TABLE conversation_messages IS 'Tracks all email exchanges in debt negotiations';
+COMMENT ON COLUMN conversation_messages.message_type IS 'Type of message in the negotiation flow';
+COMMENT ON COLUMN conversation_messages.direction IS 'Whether message was sent (outbound) or received (inbound)';
+COMMENT ON COLUMN conversation_messages.ai_analysis IS 'AI analysis results including intent, sentiment, and extracted terms';
+COMMENT ON COLUMN debts.conversation_count IS 'Total number of messages in this debt conversation';
+COMMENT ON COLUMN debts.last_message_at IS 'Timestamp of the most recent message in conversation';
+COMMENT ON COLUMN debts.negotiation_round IS 'Current round of negotiation (increments with each back-and-forth)';