Police detained dozens of Russians paying tribute to opposition leader Alexei Navalny on Saturday, as his spokeswoman accused authorities of stalling the release of his body to relatives. The 47-year-old Kremlin critic died in an Arctic prison on Friday after spending more than three years behind bars, prompting outrage and condemnation from Western leaders and his supporters. His death, which the West has blamed on the Kremlin, deprives Russia’s opposition of its figurehead just a month before elections poised to extend President Vladimir Putin’s grip on power. Makeshift memorials and small p…