diff --git a/supabase/schema.sql b/supabase/schema.sql
index 0b275b0..f540376 100644
--- a/supabase/schema.sql
+++ b/supabase/schema.sql
@@ -9,14 +9,17 @@ CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
 -- ============================================
 CREATE TABLE IF NOT EXISTS users (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  legacy_id TEXT UNIQUE, -- For migration from SQLite
   name TEXT NOT NULL,
   email TEXT NOT NULL UNIQUE,
   avatar_url TEXT,
+  password_hash TEXT NOT NULL,
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
 -- Create index on email for faster lookups
 CREATE INDEX IF NOT EXISTS idx_users_email ON users(email);
+CREATE INDEX IF NOT EXISTS idx_users_legacy_id ON users(legacy_id);
 
 -- Enable RLS
 ALTER TABLE users ENABLE ROW LEVEL SECURITY;
@@ -29,17 +32,6 @@ CREATE POLICY "Users can read own data" ON users
 CREATE POLICY "Users can update own data" ON users
   FOR UPDATE USING (auth.uid() = id);
 
--- ============================================
--- PROFILES TABLE
--- ============================================
-CREATE TABLE IF NOT EXISTS profiles (
-  id UUID PRIMARY KEY REFERENCES auth.users(id),
-  name TEXT,
-  avatar_url TEXT,
-  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
-);
-
 -- ============================================
 -- SESSIONS TABLE
 -- ============================================
@@ -91,12 +83,16 @@ CREATE POLICY "Service role manages reset tokens" ON password_reset_tokens
 -- ============================================
 CREATE TABLE IF NOT EXISTS projects (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  legacy_id TEXT UNIQUE, -- For migration from SQLite
   name TEXT NOT NULL,
   description TEXT,
   color TEXT NOT NULL,
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
+-- Create index for legacy ID lookups
+CREATE INDEX IF NOT EXISTS idx_projects_legacy_id ON projects(legacy_id);
+
 -- Enable RLS
 ALTER TABLE projects ENABLE ROW LEVEL SECURITY;
 
@@ -121,6 +117,7 @@ CREATE POLICY "Authenticated users can delete projects" ON projects
 -- ============================================
 CREATE TABLE IF NOT EXISTS sprints (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  legacy_id TEXT UNIQUE, -- For migration from SQLite
   name TEXT NOT NULL,
   goal TEXT,
   start_date DATE NOT NULL,
@@ -132,6 +129,7 @@ CREATE TABLE IF NOT EXISTS sprints (
 
 -- Create indexes
 CREATE INDEX IF NOT EXISTS idx_sprints_project_id ON sprints(project_id);
+CREATE INDEX IF NOT EXISTS idx_sprints_legacy_id ON sprints(legacy_id);
 CREATE INDEX IF NOT EXISTS idx_sprints_dates ON sprints(start_date, end_date);
 
 -- Enable RLS
@@ -146,6 +144,7 @@ CREATE POLICY "Authenticated users can manage sprints" ON sprints
 -- ============================================
 CREATE TABLE IF NOT EXISTS tasks (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  legacy_id TEXT UNIQUE, -- For migration from SQLite
   title TEXT NOT NULL,
   description TEXT,
   type TEXT NOT NULL CHECK (type IN ('idea', 'task', 'bug', 'research', 'plan')),
@@ -156,8 +155,15 @@ CREATE TABLE IF NOT EXISTS tasks (
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   created_by_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  created_by_name TEXT,
+  created_by_avatar_url TEXT,
   updated_by_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  updated_by_name TEXT,
+  updated_by_avatar_url TEXT,
   assignee_id UUID REFERENCES users(id) ON DELETE SET NULL,
+  assignee_name TEXT,
+  assignee_email TEXT,
+  assignee_avatar_url TEXT,
   due_date DATE,
   comments JSONB NOT NULL DEFAULT '[]'::jsonb,
   tags JSONB NOT NULL DEFAULT '[]'::jsonb,
@@ -171,6 +177,7 @@ CREATE INDEX IF NOT EXISTS idx_tasks_assignee_id ON tasks(assignee_id);
 CREATE INDEX IF NOT EXISTS idx_tasks_status ON tasks(status);
 CREATE INDEX IF NOT EXISTS idx_tasks_priority ON tasks(priority);
 CREATE INDEX IF NOT EXISTS idx_tasks_due_date ON tasks(due_date);
+CREATE INDEX IF NOT EXISTS idx_tasks_legacy_id ON tasks(legacy_id);
 CREATE INDEX IF NOT EXISTS idx_tasks_updated_at ON tasks(updated_at DESC);
 
 -- Create trigger to auto-update updated_at
@@ -195,6 +202,26 @@ ALTER TABLE tasks ENABLE ROW LEVEL SECURITY;
 CREATE POLICY "Authenticated users can manage tasks" ON tasks
   FOR ALL USING (auth.role() = 'authenticated');
 
+-- ============================================
+-- META TABLE (for app state like lastUpdated)
+-- ============================================
+CREATE TABLE IF NOT EXISTS meta (
+  key TEXT PRIMARY KEY,
+  value TEXT NOT NULL,
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- Enable RLS
+ALTER TABLE meta ENABLE ROW LEVEL SECURITY;
+
+-- Policy: All authenticated users can manage meta
+CREATE POLICY "Authenticated users can manage meta" ON meta
+  FOR ALL USING (auth.role() = 'authenticated');
+
+-- Insert initial lastUpdated value
+INSERT INTO meta (key, value) VALUES ('lastUpdated', extract(epoch from now()) * 1000)
+ON CONFLICT (key) DO UPDATE SET value = excluded.value;
+
 -- ============================================
 -- FUNCTIONS
 -- ============================================