The San Francisco 49ers enter the 2026/27 NFL season in a familiar place: talented enough to challenge anyone, but carrying enough injury and depth questions to make their ceiling feel fragile. After a 12-5 campaign and a painful playoff exit against Seattle, the mission is clear. Kyle Shanahan’s team must stay healthier, protect Brock Purdy better and survive a loaded NFC West. San Francisco still has the bones of a contender. Purdy remains the…