A 28-year-old male presents to a primary care clinic complaining of recurrent episodes over the past six weeks characterized by persistent nasal stuffiness, profuse clear nasal discharge, and frequent paroxysmal sneezing, especially pronounced in the mornings. He also reports associated ocular pruritus and lacrimation. He notes these symptoms seem to worsen when he is around his new cat or when pollen counts are high. His vital signs include a temperature of 36.9 C, blood pressure of 128/78 mmHg, pulse of 68/min, and respirations of 16/min. Physical examination reveals pale, boggy nasal turbinates with clear watery secretions. There are no signs of purulent discharge, facial pain on palpation, or erythema. Based on this presentation, what is the most likely diagnosis and the recommended initial pharmacotherapy?

A 35-year-old male presents to his family practice physician with a two-month history of persistent nasal congestion, sneezing, and clear rhinorrhea, particularly exacerbated in the mornings and when spending time outdoors. He reports recurrent bouts of eye itching and tearing. He notes that these symptoms have become a chronic nuisance, affecting his sleep and concentration at work. He has tried over-the-counter decongestant nasal sprays, which provide temporary relief but lead to rebound congestion. He denies fever, chills, or body aches. He works in an office setting and recently started a new hobby of gardening. His medical history is otherwise unremarkable, and he takes no regular medications. On physical examination, specific dermatological and pharyngeal findings are noted consistent with allergic shiners, a transverse nasal crease, and cobblestoning of the posterior pharynx. Lung auscultation reveals clear breath sounds bilaterally with no adventitious sounds. Given the patient's chronic presentation and physical findings, what is the most probable diagnosis and the recommended long-term management strategy?