excel preview & file handling

src/db/migrations/0005_add_is_generated_timesheets.sql

@@ -0,0 +1,3 @@
+-- Add flag to mark system-generated timesheets
+ALTER TABLE timesheets
+ADD COLUMN IF NOT EXISTS is_generated BOOLEAN NOT NULL DEFAULT FALSE;

src/db/migrations/add_crm_tables.sql

@@ -89,6 +89,17 @@ BEGIN
     END IF;
 END $$;
 
+-- Add is_generated flag to timesheets if not exists
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name='timesheets' AND column_name='is_generated'
+    ) THEN
+        ALTER TABLE timesheets ADD COLUMN is_generated BOOLEAN NOT NULL DEFAULT FALSE;
+    END IF;
+END $$;
+
 -- Create indexes for better query performance
 CREATE INDEX IF NOT EXISTS idx_companies_created_at ON companies(created_at);
 CREATE INDEX IF NOT EXISTS idx_projects_company_id ON projects(company_id);