feat(dashboard): reusable Meet Kevin components (ActionChip, ConvictionBar, YouTubeEmbed)

dashboard/src/components/meetKevin/ActionChip.tsx

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+import type { TickerAction } from '../../types/meetKevin';
+
+const COLORS: Record<TickerAction, string> = {
+  buy:   'bg-green-600/30 text-green-300 border-green-500/40',
+  sell:  'bg-red-600/30 text-red-300 border-red-500/40',
+  hold:  'bg-slate-600/30 text-slate-300 border-slate-500/40',
+  watch: 'bg-yellow-600/30 text-yellow-200 border-yellow-500/40',
+  avoid: 'bg-rose-600/40 text-rose-200 border-rose-500/40',
+};
+
+export function ActionChip({ action }: { action: TickerAction }) {
+  return (
+    <span className={`px-2 py-0.5 text-xs font-semibold uppercase rounded-md border ${COLORS[action]}`}>
+      {action}
+    </span>
+  );
+}

dashboard/src/components/meetKevin/ConvictionBar.tsx

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+export function ConvictionBar({ value }: { value: number }) {
+  const pct = Math.max(0, Math.min(1, value)) * 100;
+  return (
+    <div className="w-full h-1.5 bg-slate-700 rounded-full overflow-hidden">
+      <div className="h-full bg-blue-400" style={{ width: `${pct}%` }} />
+    </div>
+  );
+}

dashboard/src/components/meetKevin/YouTubeEmbed.tsx

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+import { useRef, useImperativeHandle, forwardRef } from 'react';
+
+export interface YouTubeEmbedHandle {
+  seekTo: (seconds: number) => void;
+}
+
+interface Props {
+  videoId: string;
+  startSeconds?: number;
+}
+
+export const YouTubeEmbed = forwardRef<YouTubeEmbedHandle, Props>(
+  ({ videoId, startSeconds = 0 }, ref) => {
+    const iframeRef = useRef<HTMLIFrameElement>(null);
+
+    useImperativeHandle(ref, () => ({
+      seekTo: (seconds: number) => {
+        const win = iframeRef.current?.contentWindow;
+        win?.postMessage(
+          JSON.stringify({ event: 'command', func: 'seekTo', args: [seconds, true] }),
+          '*',
+        );
+      },
+    }));
+
+    return (
+      <div className="relative pb-[56.25%] h-0 bg-black rounded-xl overflow-hidden">
+        <iframe
+          ref={iframeRef}
+          className="absolute inset-0 w-full h-full"
+          src={`https://www.youtube-nocookie.com/embed/${videoId}?start=${startSeconds}&enablejsapi=1`}
+          title={`YouTube video ${videoId}`}
+          allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+          allowFullScreen
+        />
+      </div>
+    );
+  },
+);
+YouTubeEmbed.displayName = 'YouTubeEmbed';

dashboard/src/components/meetKevin/index.ts

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+export { ActionChip } from './ActionChip';
+export { ConvictionBar } from './ConvictionBar';
+export { YouTubeEmbed } from './YouTubeEmbed';
+export type { YouTubeEmbedHandle } from './YouTubeEmbed';