feat: add AnimatePresence page transitions between views

src/App.tsx

@@ -1,5 +1,7 @@
 import { useState, useEffect, useCallback } from "react";
 import { getCurrentWindow } from "@tauri-apps/api/window";
+import { AnimatePresence, motion } from "framer-motion";
+import { springs, fadeSlideLeft, fadeSlideRight } from "@/lib/motion";
 import { useAppStore } from "@/stores/app-store";
 import { useBoardStore } from "@/stores/board-store";
 import { AppShell } from "@/components/layout/AppShell";
@@ -73,7 +75,33 @@ export default function App() {
   return (
     <>
       <AppShell>
-        {view.type === "board-list" ? <BoardList /> : <BoardView />}
+        <AnimatePresence mode="wait">
+          {view.type === "board-list" ? (
+            <motion.div
+              key="board-list"
+              className="h-full"
+              variants={fadeSlideRight}
+              initial="hidden"
+              animate="visible"
+              exit="exit"
+              transition={springs.gentle}
+            >
+              <BoardList />
+            </motion.div>
+          ) : (
+            <motion.div
+              key={`board-${view.boardId}`}
+              className="h-full"
+              variants={fadeSlideLeft}
+              initial="hidden"
+              animate="visible"
+              exit="exit"
+              transition={springs.gentle}
+            >
+              <BoardView />
+            </motion.div>
+          )}
+        </AnimatePresence>
       </AppShell>
       <CommandPalette onOpenSettings={handleOpenSettings} />
       <SettingsDialog open={settingsOpen} onOpenChange={setSettingsOpen} />