fix(build): resolve Linux compile errors

src/managers/git_manager.cpp

@@ -123,7 +123,6 @@ namespace
         return origin != remotes.end() ? *origin : remotes.front();
     }
 
-#ifdef _WIN32
     std::string encodeBase64(std::string_view value)
     {
         static constexpr std::string_view alphabet =
@@ -143,7 +142,6 @@ namespace
         }
         return encoded;
     }
-#endif
 
     std::vector<std::string> withAuthOverrideArguments(std::vector<std::string> arguments,
                                                        const std::optional<GitAuthOverride> &auth)
@@ -933,6 +931,8 @@ bool GitManager::captureGit(RepositoryView &repository, const std::vector<std::s
     }
 #else
     (void)arguments;
+    (void)command_output;
+    (void)stdin_data;
     error = "Git commands are currently supported on Windows";
     return false;
 #endif

src/ui/gitree_ui.cpp

@@ -1336,7 +1336,7 @@ void sidebar_item_context(const std::string& item, SidebarItemKind kind) {
     if (ImGui::MenuItem(ICON_TB_FOLDER_OPEN "  Open in file manager")) {
         std::string error;
         const std::filesystem::path path = kind == SidebarItemKind::worktree
-            ? g_git_manager->worktreePath(repo(), item, error)
+            ? std::filesystem::path(g_git_manager->worktreePath(repo(), item, error))
             : std::filesystem::path(repo().path) / item;
         if (path.empty() || !izo::OpenPath(path, &error)) g_notice = error;
     }