Cirrhosis: Given the presence of ascites and bipedal edema, along with elevated liver enzymes (AST 100s, ALT 50s), cirrhosis is a strong candidate. The AST:ALT ratio is approximately 2:1, which is often seen in cirrhosis. Clear breath sounds and the absence of explicit mention of respiratory distress reduce the likelihood of cardiogenic causes.

Nephrotic Syndrome: This condition can cause significant edema, including bipedal edema, and could potentially lead to ascites in severe cases. The liver enzyme elevation might be secondary to another process or a consequence of the nephrotic syndrome itself.
Congestive Heart Failure (CHF): Although clear breath sounds are noted, CHF can cause both ascites and bipedal edema. The liver enzyme elevation could be due to passive congestion. The absence of explicit respiratory symptoms does not entirely rule out CHF, especially if it's right-sided heart failure.
Budd-Chiari Syndrome: This condition involves hepatic vein thrombosis, leading to ascites, liver enzyme elevation, and potentially edema. It's less common but should be considered, especially if there's a history suggestive of thrombophilia.

Spontaneous Bacterial Peritonitis (SBP): Although the patient does not have clear signs of infection (e.g., fever, abdominal pain), SBP can present subtly and is a medical emergency. The presence of ascites puts the patient at risk.
Hepatic Venous Outflow Obstruction: Similar to Budd-Chiari syndrome, any condition causing obstruction of hepatic venous outflow can lead to severe liver dysfunction and ascites. This includes conditions like constrictive pericarditis.
Malignancy: Both primary liver malignancies and metastatic disease can cause ascites, liver enzyme elevation, and potentially edema. A thorough evaluation for malignancy is crucial, especially in the absence of a clear diagnosis.

Sinusoidal Obstruction Syndrome (Veno-Occlusive Disease): This is a rare condition often associated with bone marrow transplantation or certain medications. It can cause ascites, liver dysfunction, and weight gain.
Lymphatic Disorders: Conditions affecting the lymphatic system, such as lymphangiomatosis or lymphatic dysplasia, can lead to edema and ascites but are exceedingly rare and typically present with other distinctive features.
Systemic Mastocytosis: A rare condition where mast cell proliferation can lead to ascites, edema, and liver enzyme elevation among a myriad of other symptoms.