feat: add Daily Coding Tip widget with category badges and refresh button

src/components/DailyCodingTip.module.css

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+.container {
+  background: var(--ifm-card-background-color, #ffffff);
+  border: 1px solid var(--ifm-color-emphasis-200, #e5e7eb);
+  border-radius: 12px;
+  padding: 24px;
+  max-width: 600px;
+  margin: 24px auto;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
+  transition: box-shadow 0.2s ease;
+}
+
+.container:hover {
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
+}
+
+.header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  margin-bottom: 16px;
+}
+
+.headerIcon {
+  font-size: 20px;
+}
+
+.headerTitle {
+  font-size: 18px;
+  font-weight: 700;
+  margin: 0;
+  color: var(--ifm-heading-color);
+}
+
+.tipCard {
+  background: var(--ifm-color-emphasis-100, #f9fafb);
+  border-radius: 8px;
+  padding: 16px;
+  margin-bottom: 16px;
+}
+
+.fadeIn {
+  animation: fadeInUp 0.3s ease forwards;
+}
+
+@keyframes fadeInUp {
+  from {
+    opacity: 0;
+    transform: translateY(8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.categoryBadge {
+  display: inline-block;
+  font-size: 11px;
+  font-weight: 600;
+  padding: 3px 10px;
+  border-radius: 999px;
+  border: 1px solid;
+  margin-bottom: 10px;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.tipText {
+  font-size: 15px;
+  line-height: 1.6;
+  color: var(--ifm-font-color-base);
+  margin: 0;
+}
+
+.refreshButton {
+  background: var(--ifm-color-primary, #2563eb);
+  color: #ffffff;
+  border: none;
+  border-radius: 8px;
+  padding: 10px 20px;
+  font-size: 14px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: opacity 0.2s ease, transform 0.1s ease;
+  width: 100%;
+}
+
+.refreshButton:hover {
+  opacity: 0.9;
+  transform: translateY(-1px);
+}
+
+.refreshButton:active {
+  transform: translateY(0);
+}
+
+@media (max-width: 768px) {
+  .container {
+    margin: 16px;
+    padding: 16px;
+  }
+}

src/components/DailyCodingTip.tsx

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+import React, { useState, useEffect } from "react";
+import styles from "./DailyCodingTip.module.css";
+import codingTips from "../data/codingTips.json";
+
+type Tip = {
+  id: number;
+  category: string;
+  tip: string;
+};
+
+const CATEGORY_COLORS: Record<string, string> = {
+  "Git & GitHub Tips": "#f97316",
+  "JavaScript/React Tips": "#3b82f6",
+  "Open Source Contribution Tips": "#10b981",
+  "VS Code Shortcuts": "#8b5cf6",
+  "Productivity Tricks": "#ec4899",
+};
+
+function getTipOfTheDay(): Tip {
+  try {
+    const stored = localStorage.getItem("dailyCodingTip");
+    const today = new Date().toDateString();
+    if (stored) {
+      const parsed = JSON.parse(stored);
+      if (parsed.date === today) return parsed.tip;
+    }
+    const randomTip = codingTips[Math.floor(Math.random() * codingTips.length)] as Tip;
+    localStorage.setItem("dailyCodingTip", JSON.stringify({ date: today, tip: randomTip }));
+    return randomTip;
+  } catch {
+    return codingTips[0] as Tip;
+  }
+}
+
+export default function DailyCodingTip(): React.ReactElement {
+  const [tip, setTip] = useState<Tip | null>(null);
+  const [animate, setAnimate] = useState(false);
+
+  useEffect(() => {
+    setTip(getTipOfTheDay());
+    setAnimate(true);
+  }, []);
+
+  const handleRefresh = () => {
+    const randomTip = codingTips[Math.floor(Math.random() * codingTips.length)] as Tip;
+    setAnimate(false);
+    setTimeout(() => {
+      setTip(randomTip);
+      setAnimate(true);
+    }, 150);
+  };
+
+  if (!tip) return <></>;
+
+  const categoryColor = CATEGORY_COLORS[tip.category] || "#6b7280";
+
+  return (
+    <div className={styles.container}>
+      <div className={styles.header}>
+        <span className={styles.headerIcon}>💡</span>
+        <h3 className={styles.headerTitle}>Daily Coding Tip</h3>
+      </div>
+      <div className={`${styles.tipCard} ${animate ? styles.fadeIn : ""}`}>
+        <span
+          className={styles.categoryBadge}
+          style={{
+            backgroundColor: `${categoryColor}20`,
+            color: categoryColor,
+            borderColor: `${categoryColor}40`,
+          }}
+        >
+          {tip.category}
+        </span>
+        <p className={styles.tipText}>{tip.tip}</p>
+      </div>
+      <button
+        className={styles.refreshButton}
+        onClick={handleRefresh}
+        aria-label="Get a new random coding tip"
+      >
+        🔀 Get Another Tip
+      </button>
+    </div>
+  );
+}

src/data/codingTips.json

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+[
+  { "id": 1, "category": "Git & GitHub Tips", "tip": "Use `git stash` to temporarily save uncommitted changes before switching branches." },
+  { "id": 2, "category": "Git & GitHub Tips", "tip": "Use `git log --oneline` for a compact view of your commit history." },
+  { "id": 3, "category": "Git & GitHub Tips", "tip": "Always write meaningful commit messages — future you will thank present you." },
+  { "id": 4, "category": "Git & GitHub Tips", "tip": "Use `git bisect` to find the commit that introduced a bug using binary search." },
+  { "id": 5, "category": "JavaScript/React Tips", "tip": "Use optional chaining (`?.`) to safely access deeply nested object properties." },
+  { "id": 6, "category": "JavaScript/React Tips", "tip": "Prefer `const` over `let` when the variable won't be reassigned." },
+  { "id": 7, "category": "JavaScript/React Tips", "tip": "Use React.memo() to prevent unnecessary re-renders of functional components." },
+  { "id": 8, "category": "JavaScript/React Tips", "tip": "Use the nullish coalescing operator (`??`) instead of `||` when 0 or empty string are valid values." },
+  { "id": 9, "category": "Open Source Contribution Tips", "tip": "Always read CONTRIBUTING.md before opening a pull request." },
+  { "id": 10, "category": "Open Source Contribution Tips", "tip": "Start with 'good first issue' labeled issues when contributing to a new project." },
+  { "id": 11, "category": "Open Source Contribution Tips", "tip": "Keep your PRs small and focused — one feature or fix per PR." },
+  { "id": 12, "category": "Open Source Contribution Tips", "tip": "Sync your fork with the upstream repo regularly to avoid merge conflicts." },
+  { "id": 13, "category": "VS Code Shortcuts", "tip": "Use `Ctrl + P` to quickly open any file in your project." },
+  { "id": 14, "category": "VS Code Shortcuts", "tip": "Use `Ctrl + Shift + K` to delete an entire line instantly." },
+  { "id": 15, "category": "VS Code Shortcuts", "tip": "Use `Alt + Click` to place multiple cursors for simultaneous editing." },
+  { "id": 16, "category": "VS Code Shortcuts", "tip": "Use `Ctrl + backtick` to toggle the integrated terminal." },
+  { "id": 17, "category": "Productivity Tricks", "tip": "Use the Pomodoro technique — 25 minutes of focused work followed by a 5-minute break." },
+  { "id": 18, "category": "Productivity Tricks", "tip": "Rubber duck debugging: explain your code out loud to find bugs faster." },
+  { "id": 19, "category": "Productivity Tricks", "tip": "Write TODO comments in code to track unfinished work." },
+  { "id": 20, "category": "Productivity Tricks", "tip": "Take breaks — stepping away from a problem often leads to the solution faster." }
+]