feat(videos): add ToolGrid and BeforeAfter components

apps/videos/src/components/BeforeAfter.tsx

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+import type React from "react";
+import { interpolate, useCurrentFrame } from "remotion";
+import { COLOR } from "@/lib/colors";
+import { EASE } from "@/lib/motion";
+
+export const BeforeAfter: React.FC<{
+  before: React.ReactNode;
+  after: React.ReactNode;
+  scanStartFrame: number;
+  scanDuration: number;
+  width: number;
+  height: number;
+  style?: React.CSSProperties;
+}> = ({ before, after, scanStartFrame, scanDuration, width, height, style }) => {
+  const frame = useCurrentFrame();
+
+  const scanProgress = interpolate(
+    frame,
+    [scanStartFrame, scanStartFrame + scanDuration],
+    [0, 100],
+    { extrapolateLeft: "clamp", extrapolateRight: "clamp", easing: EASE.smooth },
+  );
+
+  const scanX = (scanProgress / 100) * width;
+
+  return (
+    <div
+      style={{
+        position: "relative",
+        width,
+        height,
+        overflow: "hidden",
+        borderRadius: 8,
+        ...style,
+      }}
+    >
+      <div style={{ position: "absolute", inset: 0 }}>{before}</div>
+
+      <div
+        style={{
+          position: "absolute",
+          inset: 0,
+          clipPath: `inset(0 ${100 - scanProgress}% 0 0)`,
+        }}
+      >
+        {after}
+      </div>
+
+      {scanProgress > 0 && scanProgress < 100 && (
+        <div
+          style={{
+            position: "absolute",
+            left: scanX,
+            top: 0,
+            width: 2,
+            height: "100%",
+            backgroundColor: COLOR.accent,
+            boxShadow: `0 0 20px ${COLOR.accent}80`,
+            zIndex: 10,
+          }}
+        />
+      )}
+    </div>
+  );
+};

apps/videos/src/components/ToolGrid.tsx

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+import type React from "react";
+import { spring, useCurrentFrame, useVideoConfig } from "remotion";
+import { ToolPill } from "@/components/ToolPill";
+import { CATEGORY_ORDER } from "@/lib/colors";
+import { SPRING, TIMING } from "@/lib/motion";
+import { getToolsByCategory, TOOLS } from "@/lib/tools";
+
+export const ToolGrid: React.FC<{
+  startFrame: number;
+  cellWidth?: number;
+  cellHeight?: number;
+  gap?: number;
+  style?: React.CSSProperties;
+}> = ({ startFrame, cellWidth = 140, cellHeight = 32, gap = 6, style }) => {
+  const frame = useCurrentFrame();
+  const { fps } = useVideoConfig();
+
+  let globalIndex = 0;
+
+  return (
+    <div
+      style={{
+        display: "flex",
+        gap: gap * 2,
+        ...style,
+      }}
+    >
+      {CATEGORY_ORDER.map((cat) => {
+        const tools = getToolsByCategory(cat);
+        return (
+          <div key={cat} style={{ display: "flex", flexDirection: "column", gap }}>
+            {tools.map((tool) => {
+              const i = globalIndex++;
+              const enterDelay = startFrame + i * TIMING.staggerFrames;
+              const s = spring({
+                frame: frame - enterDelay,
+                fps,
+                config: SPRING.settle,
+              });
+
+              return (
+                <div
+                  key={tool.name}
+                  style={{
+                    opacity: s,
+                    transform: `translateX(${(1 - s) * 100}px) scale(${0.8 + s * 0.2})`,
+                  }}
+                >
+                  <ToolPill
+                    name={tool.name}
+                    category={tool.category}
+                    style={{ width: cellWidth, fontSize: 11, padding: "3px 8px" }}
+                  />
+                </div>
+              );
+            })}
+          </div>
+        );
+      })}
+    </div>
+  );
+};