“Happy Days” star Linda Purl made a rare appearance in Los Angeles. The ’70s icon was pictured picking up her cake from a Gelson’s market for her 71st birthday on Wednesday. For the outing, the actress kept a low profile, wearing a red baseball cap, a long-sleeve blue shirt and black pants. She also celebrated her special day by doing a solo hike before inviting some friends over to her house for a get-together. Purl became a household name with her role in “Happy Days,” which followed wholesome, sweet-natured teenager Richie Cunningham (Ron Howard) as he navigated the usual awkward trials of high school, dating and growing up. She first…
