Rinse the rice, then cook it with 2 cups of water and a pinch of salt, covered, on low heat for 15 minutes. Rest 5 minutes off the heat with the lid on.
Pat the fish very dry. Season with salt and pepper, and dust lightly with rice flour if using.
Heat the garlic-infused oil in a large skillet over medium-high until it shimmers. Cook the fish 3 to 4 minutes without moving it, flip, and cook 2 to 3 minutes more, until it flakes easily and reaches 145°F (63°C). Move to a plate.
Wipe the skillet, add the olive oil, and cook the zucchini with a pinch of salt for about 4 minutes, until browned at the edges but still firm.
Lower the heat. Stir in the ginger for 30 seconds, then add the lemon juice, 2 tablespoons of water, and the maple syrup. Swirl in the butter until glossy.
Spoon the sauce over the fish, top with chives, and serve with the rice and zucchini.