feat: add Entrepreneurship & Startup notes for Sem 7

app/components/subjects.tsx

@@ -115,7 +115,7 @@ const subjectCodes: Record<string, string> = {
   "Information Retrieval": "ir",
   "Management Information Systems": "mis",
   "VLSI and Embedded Systems": "vlsi",
-  "Entrepreneurship & Startup": "es",
+  "Entrepreneurship & Startup": "eas",
   "Financial Management": "fm",
   "Robotic Access Automation": "raa",
   "Marketing Management": "mm",
@@ -125,7 +125,7 @@ const subjectCodes: Record<string, string> = {
 };
 
 // Available subjects
-const available = ["ep", "c", "em1", "em2", "oops", "dsc", "coa", "os", "ml", "dops", "cd", "cle","ec"];
+const available = ["ep", "c", "em1", "em2", "oops", "dsc", "coa", "os", "ml", "dops", "cd", "cle","ec","eas"];
 
 export default function SubjectsSection() {
   return (

app/sem7/eas/[chapter]/page.tsx

@@ -0,0 +1,208 @@
+import Link from "next/link";
+import { Metadata } from "next";
+import { Righteous } from "next/font/google";
+import { ArrowBigLeft, ArrowBigRight } from "lucide-react";
+
+import { chapters, Chapter, SubTopic } from "../constants";
+import { Ch0Content } from "../content/chapter0";
+import { Ch1Content } from "../content/chapter1";
+import { Ch2Content } from "../content/chapter2";
+import { Ch3Content } from "../content/chapter3";
+import { Ch4Content } from "../content/chapter4";
+
+import BookmarkButton from "../../../components/BookmarkButton";
+
+// Map chapter/subtopic IDs to their content components
+const chapterComponents: Record<string, React.ComponentType> = {
+  ch0: Ch0Content,
+  ch1: Ch1Content,
+  ch2: Ch2Content,
+  ch3: Ch3Content,
+  ch4: Ch4Content,
+};
+
+const righteous = Righteous({
+  subsets: ["latin"],
+  weight: "400",
+  variable: "--font-righteous",
+});
+
+// Helper: find a chapter or subtopic by id
+function findChapterOrSubtopic(chapterId: string) {
+  const chapter = chapters.find((c) => c.id === chapterId);
+  if (chapter) return { data: chapter, isSubTopic: false, parentChapter: null };
+
+  for (const ch of chapters) {
+    if (ch.subTopics) {
+      const sub = ch.subTopics.find(
+        (s) => s.id === chapterId && s.isPage
+      ) as (SubTopic & { isPage: true }) | undefined;
+      if (sub) return { data: sub, isSubTopic: true, parentChapter: ch };
+    }
+  }
+  return { data: undefined, isSubTopic: false, parentChapter: null };
+}
+
+type ChapterProps = {
+  params: Promise<{ chapter: string }>;
+};
+
+// Dynamic SEO metadata
+export async function generateMetadata({ params }: ChapterProps): Promise<Metadata> {
+  const { chapter: chapterId } = await params;
+  const { data: chapterData } = findChapterOrSubtopic(chapterId);
+
+  const title = chapterData
+    ? `${chapterData.title} | Entrepreneurship & Startup | openCSE`
+    : "Entrepreneurship & Startup | openCSE";
+
+  return { title };
+}
+
+export default async function ChapterPage({ params }: ChapterProps) {
+  const { chapter: chapterId } = await params;
+
+  const { data: chapterData, isSubTopic, parentChapter } =
+    findChapterOrSubtopic(chapterId);
+
+  // 404 fallback
+  if (!chapterData) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-[50vh] text-[#e2d1c1] p-6">
+        <h1 className="text-2xl font-bold mb-4">Chapter not found</h1>
+        <Link
+          href="/sem7/eas/ch0"
+          className="px-4 py-2 bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition font-bold"
+        >
+          Return to Course Outline
+        </Link>
+      </div>
+    );
+  }
+
+  // For subtopics: use their parent chapter's content component
+  const componentKey = isSubTopic && parentChapter ? parentChapter.id : chapterData.id;
+  const ChapterComponent = chapterComponents[componentKey] ?? null;
+
+  // Prev / Next navigation
+  let prevChapter: { id: string; title: string } | null = null;
+  let nextChapter: { id: string; title: string } | null = null;
+
+  if (isSubTopic && parentChapter && parentChapter.subTopics) {
+    const pageSubTopics = parentChapter.subTopics.filter(
+      (s): s is SubTopic & { isPage: true } => !!s.isPage
+    );
+    const subIndex = pageSubTopics.findIndex((s) => s.id === chapterId);
+
+    if (subIndex > 0) {
+      prevChapter = pageSubTopics[subIndex - 1];
+    } else {
+      prevChapter = {
+        id: parentChapter.id,
+        title: `Back to ${parentChapter.title}`,
+      };
+    }
+
+    if (subIndex < pageSubTopics.length - 1) {
+      nextChapter = pageSubTopics[subIndex + 1];
+    } else {
+      const parentIndex = chapters.findIndex((c) => c.id === parentChapter.id);
+      if (parentIndex < chapters.length - 1) {
+        nextChapter = chapters[parentIndex + 1];
+      }
+    }
+  } else {
+    const currentIndex = chapters.findIndex((c) => c.id === chapterId);
+    prevChapter = currentIndex > 0 ? chapters[currentIndex - 1] : null;
+    nextChapter =
+      currentIndex < chapters.length - 1 ? chapters[currentIndex + 1] : null;
+  }
+
+  return (
+    <div className="flex flex-col bg-[#1B0D00] min-h-full p-2 pt-6 text-[#e2d1c1]">
+      <div className="flex-1">
+        {/* Subject title */}
+        <h1 className={`text-3xl sm:text-4xl font-bold ${righteous.className} mb-2`}>
+          Entrepreneurship & Startup
+        </h1>
+
+        {/* Chapter title + bookmark */}
+        <div className="flex items-center justify-between gap-2 flex-wrap">
+          <p className={`text-xl sm:text-2xl mt-[-4px] ${righteous.className}`}>
+            {isSubTopic && parentChapter
+              ? `${parentChapter.title} / ${chapterData.title}`
+              : chapterData.title}
+          </p>
+          <BookmarkButton title={`EAS: ${chapterData.title}`} />
+        </div>
+
+        {/* Top navigation */}
+        <div className="flex justify-between mt-3 gap-2">
+          {prevChapter ? (
+            <Link
+              href={`/sem7/eas/${prevChapter.id}`}
+              className="px-3 py-1 text-lg sm:text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+              style={{ fontFamily: "Rockwell, Serif, serif" }}
+            >
+              <ArrowBigLeft className="inline-block mr-1" /> Previous
+            </Link>
+          ) : (
+            <div />
+          )}
+
+          {nextChapter ? (
+            <Link
+              href={`/sem7/eas/${nextChapter.id}`}
+              className="px-3 py-1 text-lg sm:text-2xl flex items-center justify-center bg-[#e2d1c1] text-[#1b0d00] rounded hover:bg-[#ac9e91] transition"
+              style={{ fontFamily: "Rockwell, Serif, serif" }}
+            >
+              Next <ArrowBigRight className="inline-block ml-1" />
+            </Link>
+          ) : (
+            <div />
+          )}
+        </div>
+
+        <hr className="my-6 border-t-3" />
+
+        {/* Chapter content */}
+        {ChapterComponent ? (
+          <ChapterComponent />
+        ) : (
+          <p className="text-[#e2d1c1] opacity-60 text-center mt-12">
+            Content coming soon.
+          </p>
+        )}
+      </div>
+
+      {/* Bottom navigation */}
+      <div className="flex justify-between my-8 gap-2 flex-wrap">
+        {prevChapter ? (
+          <Link
+            href={`/sem7/eas/${prevChapter.id}`}
+            className="px-3 py-2 bg-[#e2d1c1] text-base sm:text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition max-w-[45%] text-center"
+            style={{ fontFamily: "Rockwell, Serif, serif" }}
+          >
+            <ArrowBigLeft className="inline-block mr-1 shrink-0" />
+            <span className="truncate">{prevChapter.title}</span>
+          </Link>
+        ) : (
+          <div />
+        )}
+
+        {nextChapter ? (
+          <Link
+            href={`/sem7/eas/${nextChapter.id}`}
+            className="px-3 py-2 bg-[#e2d1c1] text-base sm:text-xl flex items-center justify-center text-[#1b0d00] rounded hover:bg-[#ac9e91] transition max-w-[45%] text-center"
+            style={{ fontFamily: "Rockwell, Serif, serif" }}
+          >
+            <span className="truncate">{nextChapter.title}</span>
+            <ArrowBigRight className="inline-block ml-1 shrink-0" />
+          </Link>
+        ) : (
+          <div />
+        )}
+      </div>
+    </div>
+  );
+}

app/sem7/eas/components/Sidebar.tsx

@@ -0,0 +1,144 @@
+"use client";
+import { Righteous } from "next/font/google";
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { useState, useEffect } from "react";
+import { chapters } from "../constants";
+
+const righteous = Righteous({
+  subsets: ["latin"],
+  weight: "400",
+  variable: "--font-righteous",
+});
+
+export default function Sidebar() {
+  const pathname = usePathname();
+  const [open, setOpen] = useState(false);
+
+  useEffect(() => {
+    if (window.innerWidth >= 768) {
+      setOpen(true);
+    }
+  }, []);
+
+  const quizHref = "/quiz/eas";
+  const quizActive = pathname.startsWith("/quiz");
+
+  return (
+    <>
+      {/* Backdrop overlay - only on mobile when open */}
+      <div
+        className={`fixed inset-0 md:hidden bg-black/50 z-30 transition-opacity duration-300 ${
+          open ? "opacity-100" : "opacity-0 pointer-events-none"
+        }`}
+        onClick={() => setOpen(false)}
+      />
+
+      <div className="flex sticky top-14 z-40 h-[calc(100vh-3.5rem)] w-[50px] md:w-auto pointer-events-none md:pointer-events-auto">
+        {/* Sidebar */}
+        <aside
+          className={`h-full shrink-0 bg-[#fae8d7] text-[#1B0D00] p-0 flex flex-col transition-all duration-300 pointer-events-auto border-r-0 ${
+            open ? "w-64 border-r-2 md:border-r-0" : "w-0 overflow-hidden"
+          }`}
+        >
+          <h2
+            className="flex items-center text-2xl font-normal pt-3 pl-3 mb-2 bg-[#cebb9c] text-[#1B0D00] pb-2 border-b-4 border-[#1B0D00]"
+            style={{ fontFamily: "Rockwell, Serif, serif" }}
+          >
+            Chapters
+          </h2>
+          <ul className="flex-1 overflow-y-auto no-scrollbar space-y-0">
+            {chapters.map((ch) => {
+              const active =
+                pathname === `/sem7/eas/${ch.id}` ||
+                (ch.subTopics?.some(
+                  (sub) => sub.isPage && pathname === `/sem7/eas/${sub.id}`
+                ) ?? false);
+              return (
+                <li key={ch.id} className="flex flex-col">
+                  <Link
+                    href={`/sem7/eas/${ch.id}`}
+                    className={`block px-3 py-2 text-xl transition ${
+                      active ? "bg-[#fccc7e]" : "hover:bg-[#ffdda7af]"
+                    } ${righteous.className}`}
+                  >
+                    {ch.title}
+                  </Link>
+                  {active && ch.subTopics && (
+                    <ul className="ml-4 border-l-2 border-[#1B0D00]/20 pl-2 my-2 space-y-2">
+                      {ch.subTopics.map((sub) => {
+                        const subActive =
+                          sub.isPage && pathname === `/sem7/eas/${sub.id}`;
+                        return (
+                          <li key={sub.id}>
+                            <Link
+                              href={
+                                sub.isPage
+                                  ? `/sem7/eas/${sub.id}`
+                                  : `/sem7/eas/${ch.id}#${sub.id}`
+                              }
+                              className={`block text-sm transition hover:font-bold ${
+                                subActive
+                                  ? "text-black font-bold"
+                                  : "text-[#3a2a14] hover:text-black"
+                              }`}
+                            >
+                              {sub.title}
+                            </Link>
+                          </li>
+                        );
+                      })}
+                    </ul>
+                  )}
+                </li>
+              );
+            })}
+          </ul>
+
+          <div className="border-t-4 border-[#1B0D00]">
+            <h2
+              className="flex items-center text-2xl font-normal pt-3 pl-3 mb-2 bg-[#cebb9c] text-[#1B0D00] pb-2"
+              style={{ fontFamily: "Rockwell, Serif, serif" }}
+            >
+              Quiz
+            </h2>
+            <Link
+              href={quizHref}
+              className={`flex items-center gap-2 px-3 py-2 text-xl transition ${
+                quizActive ? "bg-[#fccc7e]" : "hover:bg-[#ffdda7af]"
+              } ${righteous.className}`}
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                className="w-5 h-5 shrink-0"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                strokeWidth={2}
+                strokeLinecap="round"
+                strokeLinejoin="round"
+              >
+                <path d="M12 20h9" />
+                <path d="M16.5 3.5a2.121 2.121 0 0 1 3 3L7 19l-4 1 1-4Z" />
+              </svg>
+              Take the Quiz
+            </Link>
+          </div>
+        </aside>
+
+        <button
+          onClick={() => setOpen(!open)}
+          className="toggle-sidebar shrink-0 pointer-events-auto bg-[#ffdda7] h-full w-[50px] text-[#1B0D00] text-center font-semibold text-2xl border-l-4 rounded-r-2xl border-[#1B0D00] flex items-center justify-center transition-all duration-300 md:shadow-none"
+          style={{
+            fontFamily: "Rockwell, Serif, serif",
+            boxShadow: open ? "4px 0 15px rgba(0,0,0,0.1)" : "none",
+          }}
+        >
+          <p className="leading-5">
+            C<br />H<br />A<br />P<br />T<br />E<br />R<br />S
+          </p>
+        </button>
+      </div>
+    </>
+  );
+}