change things

src/modules/admin/components/courses/AssessmentEditor.jsx

@@ -1,19 +1,17 @@
 import { useEffect, useRef, useState } from "react";
-import { useNavigate, useParams } from "react-router-dom";
-import { ArrowLeft, House, Plus, Save, ClipboardList, ChevronUp, ChevronDown, AlertTriangle, Trash2 } from "lucide-react";
+import { Plus, Save, ClipboardList, ChevronUp, ChevronDown, AlertTriangle, Trash2, X } from "lucide-react";
 
 import { toast } from "sonner";
 import { useCourses } from "@/contexts/AdminCoursesContext";
 import { useAuth } from "@/contexts/AuthContext";
 import { useUnsavedChangesGuard } from "@/hooks/useUnsavedChangesGuard";
-import { PageMeta } from "@/contexts/MetadataContext";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Spinner } from "@/components/ui/spinner";
 import { Checkbox } from "@/components/ui/checkbox";
 import { cn } from "@/lib/utils";
-import { QuestionCard, makeQuestion } from "../../components/courses/QuestionEditor";
+import { QuestionCard, makeQuestion } from "./QuestionEditor";
 import api from "@/utils/api.util";
 
 // ── Dirty-check snapshot ──────────────────────────────────────────────────────
@@ -114,7 +112,7 @@ const TYPE_LABEL = {
 
 function QuestionNavigator({ questions, activeIndex, onJump, onMove, navItemRefs, navContainerRef, errors }) {
   return (
-    <div className="flex flex-col h-full">
+    <div className="flex flex-col rounded-lg border bg-card overflow-hidden">
 
       {/* Header */}
       <div className="px-3 py-3 border-b shrink-0">
@@ -127,7 +125,7 @@ function QuestionNavigator({ questions, activeIndex, onJump, onMove, navItemRefs
       </div>
 
       {/* Scrollable list */}
-      <div ref={navContainerRef} className="flex-1 overflow-y-auto py-2">
+      <div ref={navContainerRef} className="max-h-96 overflow-y-auto py-2">
         {questions.length === 0 ? (
           <p className="text-xs text-muted-foreground text-center py-8 px-3">
             No questions yet.
@@ -216,15 +214,13 @@ function QuestionNavigator({ questions, activeIndex, onJump, onMove, navItemRefs
   );
 }
 
-// ── Main Page ─────────────────────────────────────────────────────────────────
+// ── Main ──────────────────────────────────────────────────────────────────────
 
-export default function CourseAssessment() {
-  const navigate = useNavigate();
-  const { courseId } = useParams();
+export default function AssessmentEditor({ courseId, onSaved, onCancel }) {
   const {
     createAssessment, updateAssessment,
     bulkSyncAssessmentQuestions,
-    course, loading,
+    loading,
   } = useCourses();
 
   const [localAssessment, setLocalAssessment] = useState(null);
@@ -258,7 +254,6 @@ export default function CourseAssessment() {
   const questionRefs = useRef([]);
   const navItemRefs = useRef([]);
   const navContainerRef = useRef(null);
-  const headerRef = useRef(null);
 
   // ── Fetch — silently treat 404 as "no assessment yet" (create mode) ─────────
   useEffect(() => {
@@ -313,20 +308,6 @@ export default function CourseAssessment() {
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [initializing]);
 
-  // ── Measure sticky header → --assessment-h ────────────────────────────────
-  useEffect(() => {
-    if (!headerRef.current) return;
-    const update = () => {
-      document.documentElement.style.setProperty(
-        "--assessment-h",
-        `${headerRef.current.offsetHeight}px`
-      );
-    };
-    update();
-    window.addEventListener("resize", update);
-    return () => window.removeEventListener("resize", update);
-  }, []);
-
   // ── Scroll to keep active nav item visible ─────────────────────────────────
   useEffect(() => {
     const item = navItemRefs.current[activeIndex];
@@ -363,15 +344,11 @@ export default function CourseAssessment() {
     return () => observers.forEach((o) => o.disconnect());
   }, [questions.length]);
 
-  // ── Scroll helper with sticky offset ──────────────────────────────────────
+  // ── Scroll helper — a generous scroll-margin-top on each question keeps it
+  //    clear of the page's sticky navbar/tab-bar above without needing to
+  //    measure their heights.
   const scrollToQuestion = (index) => {
-    const el = questionRefs.current[index];
-    if (!el) return;
-    const navbarH = parseInt(getComputedStyle(document.documentElement).getPropertyValue("--navbar-h") || "0", 10);
-    const assessmentH = parseInt(getComputedStyle(document.documentElement).getPropertyValue("--assessment-h") || "0", 10);
-    const offset = navbarH + assessmentH + 16;
-    const top = el.getBoundingClientRect().top + window.scrollY - offset;
-    window.scrollTo({ top, behavior: "smooth" });
+    questionRefs.current[index]?.scrollIntoView({ behavior: "smooth", block: "start" });
   };
 
   // ── Question actions ───────────────────────────────────────────────────────
@@ -530,6 +507,7 @@ export default function CourseAssessment() {
     initialSnapshot.current = snapAssessment({ title, passingScore, timeLimit, isRequired, maxQuestions, maxAttempts, cooldownHours, shuffleQuestions, questions });
     localStorage.removeItem(DRAFT_KEY);
     setDraftInfo(null);
+    onSaved?.();
   };
 
   const handleConfirmSave = async () => {
@@ -542,26 +520,16 @@ export default function CourseAssessment() {
 
   // ── Render ─────────────────────────────────────────────────────────────────
   return (
-    <div className="flex flex-col min-h-screen bg-muted/60">
-      <PageMeta title={course ? `${course.title} – Assessment - STARR` : undefined} />
+    <div className="space-y-4">
 
-      {/* ── Sticky header ── */}
-      <div
-        ref={headerRef}
-        className="sticky z-20 shrink-0 border-b bg-white/70 dark:bg-zinc-900/70 backdrop-blur-md"
-        style={{ top: "var(--navbar-h)" }}
-      >
-        <div className="lg:container lg:mx-auto lg:px-6 px-4">
-          <div className="flex items-center gap-2 py-3">
-            <Button type="button" variant="ghost" size="icon" onClick={() => navigate("/admin/courses")}>
-              <ArrowLeft className="h-4 w-4" />
-            </Button>
+      {/* ── Toolbar ── */}
+      <div className="flex items-center gap-2 rounded-lg border bg-card px-4 py-3">
         <div className="flex-1 min-w-0">
-              <h1 className="text-xl font-semibold leading-tight flex items-center gap-2">
-                <ClipboardList className="h-5 w-5 text-muted-foreground" />
-                Course Assessment
-              </h1>
-              <p className="text-sm text-muted-foreground">
+          <p className="text-sm font-semibold flex items-center gap-1.5">
+            <ClipboardList className="h-4 w-4 text-muted-foreground" />
+            {localAssessment ? "Modify Assessment" : "Create Assessment"}
+          </p>
+          <p className="text-xs text-muted-foreground">
             {questions.length} question{questions.length !== 1 ? "s" : ""} · {totalPoints} total point{totalPoints !== 1 ? "s" : ""}
           </p>
         </div>
@@ -571,36 +539,29 @@ export default function CourseAssessment() {
               <span className="size-2 rounded-full bg-amber-500" />
               Draft saved {new Date(draftInfo.savedAt).toLocaleTimeString()}
             </span>
-                <Button
-                  type="button"
-                  variant="outline"
-                  onClick={handleClearDraft}
-                >
-                  <Trash2 />
+            <Button type="button" variant="outline" size="sm" onClick={handleClearDraft}>
+              <Trash2 className="h-3.5 w-3.5" />
               Clear draft
             </Button>
           </div>
         )}
+        {onCancel && (
+          <Button type="button" variant="ghost" size="sm" onClick={onCancel}>
+            <X className="h-3.5 w-3.5 mr-1" />
+            Cancel
+          </Button>
+        )}
         <Button onClick={handleSave} disabled={loading || confirmLoading || !isDirty}>
           {(loading || confirmLoading) ? <Spinner className="h-4 w-4 mr-2" /> : <Save className="h-4 w-4 mr-2" />}
           Save Assessment
         </Button>
       </div>
-        </div>
-      </div>
 
       {/* ── Split layout ── */}
-      <div className="flex flex-1 lg:container lg:mx-auto lg:px-6 px-0 w-full items-start">
+      <div className="flex flex-col lg:flex-row gap-6 items-start">
 
         {/* LEFT — Navigator (desktop only) */}
-        <div
-          className="hidden lg:flex flex-col w-60 shrink-0 border-r bg-background"
-          style={{
-            position: "sticky",
-            top: `calc(var(--navbar-h) + var(--assessment-h, 0px))`,
-            height: `calc(100vh - var(--navbar-h) - var(--assessment-h, 0px))`,
-          }}
-        >
+        <div className="hidden lg:block w-64 shrink-0">
           <QuestionNavigator
             questions={questions}
             activeIndex={activeIndex}
@@ -613,13 +574,13 @@ export default function CourseAssessment() {
         </div>
 
         {/* RIGHT — Main content */}
-        <div className="flex-1 min-w-0 px-4 lg:px-8 py-6">
+        <div className="flex-1 min-w-0 w-full">
           {initializing ? (
             <div className="flex items-center justify-center py-20">
               <Spinner className="h-6 w-6" />
             </div>
           ) : (
-            <div className="max-w-5xl space-y-6 pb-16">
+            <div className="space-y-6 pb-16">
 
               {/* ── Settings ── */}
               <div className="rounded-lg border bg-card p-6 space-y-5">
@@ -740,6 +701,7 @@ export default function CourseAssessment() {
                     <div
                       key={q._tempId ?? q.question_id ?? i}
                       ref={(el) => (questionRefs.current[i] = el)}
+                      style={{ scrollMarginTop: "calc(var(--navbar-h, 64px) + 180px)" }}
                       onClick={() => setActiveIndex(i)}
                     >
                       <QuestionCard

src/modules/admin/components/courses/AssessmentOverview.jsx

@@ -1,7 +1,6 @@
 import { useEffect, useState } from "react";
-import { useNavigate, useParams } from "react-router-dom";
 import {
-  ArrowLeft, ClipboardList, NotebookPen,
+  ClipboardList, NotebookPen,
   CheckCircle2, Circle, Users, Activity,
   ChevronDown, ChevronUp,
 } from "lucide-react";
@@ -10,7 +9,6 @@ import { toast } from "sonner";
 import { useCourses } from "@/contexts/AdminCoursesContext";
 import api from "@/utils/api.util";
 import { useDateFormat } from "@/hooks/useDateFormat";
-import { PageMeta } from "@/contexts/MetadataContext";
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
 import { Separator } from "@/components/ui/separator";
@@ -327,7 +325,7 @@ function LoadingSkeleton() {
   );
 }
 
-// ─── Page ─────────────────────────────────────────────────────────────────────
+// ─── Main ──────────────────────────────────────────────────────────────────────
 
 const TABS = [
   { key: "questions",    label: "Questions",    icon: ClipboardList },
@@ -335,10 +333,7 @@ const TABS = [
   { key: "sessions",     label: "Sessions",     icon: Activity      },
 ];
 
-export default function ViewAssessment() {
-  const navigate = useNavigate();
-  const { courseId } = useParams();
-
+export default function AssessmentOverview({ courseId, onModify }) {
   const {
     fetchAssessmentCompletions, fetchAssessmentSessions,
     completions, sessions,
@@ -346,10 +341,12 @@ export default function ViewAssessment() {
   } = useCourses();
 
   const [localAssessment, setLocalAssessment] = useState(null);
+  const [initializing, setInitializing] = useState(true);
   const [activeTab, setActiveTab] = useState("questions");
 
   useEffect(() => {
     (async () => {
+      setInitializing(true);
       try {
         const { data } = await api.get(`/admin/courses/${courseId}/assessment`);
         setLocalAssessment(data?.data?.data ?? null);
@@ -357,6 +354,8 @@ export default function ViewAssessment() {
         if (err?.response?.status !== 404) {
           toast(err?.response?.data?.message ?? "Could not load assessment.");
         }
+      } finally {
+        setInitializing(false);
       }
     })();
   }, [courseId]);
@@ -372,39 +371,32 @@ export default function ViewAssessment() {
   const totalPoints = questions.reduce((sum, q) => sum + (q.points ?? 1), 0);
 
   return (
-    <div className="flex flex-col min-h-screen bg-muted/60">
-      <PageMeta title="View Assessment - STARR" />
+    <div className="space-y-5">
 
-      {/* ── Header ── */}
-      <div
-        className="sticky z-20 shrink-0 border-b bg-white/70 dark:bg-zinc-900/70 backdrop-blur-md"
-        style={{ top: "var(--navbar-h)" }}
-      >
-        <div className="lg:container lg:mx-auto lg:px-6 px-4">
-          <div className="flex items-center gap-3 py-3">
-            <Button type="button" variant="ghost" size="icon" onClick={() => navigate("/admin/courses")}>
-              <ArrowLeft className="h-4 w-4" />
-            </Button>
+      {/* ── Toolbar ── */}
+      <div className="flex items-center gap-2 rounded-lg border bg-card px-4 py-3">
         <div className="flex-1 min-w-0">
-              <h1 className="text-xl font-semibold leading-tight flex items-center gap-2">
-                <ClipboardList className="h-5 w-5 text-muted-foreground" />
-                View Assessment
-              </h1>
+          <p className="text-sm font-semibold flex items-center gap-1.5">
+            <ClipboardList className="h-4 w-4 text-muted-foreground" />
+            Assessment
+          </p>
           {localAssessment && (
-                <p className="text-sm text-muted-foreground">
+            <p className="text-xs text-muted-foreground">
               {questions.length} question{questions.length !== 1 ? "s" : ""} · {totalPoints} total point{totalPoints !== 1 ? "s" : ""}
             </p>
           )}
         </div>
-            <Button variant="outline" size="sm" onClick={() => navigate(`/admin/courses/${courseId}/assessment`)}>
+        {localAssessment && (
+          <Button variant="outline" size="sm" onClick={onModify}>
             <NotebookPen className="h-4 w-4 mr-2" />
             Modify Assessment
           </Button>
+        )}
       </div>
 
-          {/* Tabs */}
+      {/* ── Sub-tabs ── */}
       {localAssessment && (
-            <div className="flex gap-1 pb-0 -mb-px">
+        <div className="flex gap-1 border-b">
           {TABS.map(({ key, label, icon: Icon }) => (
             <button
               key={key}
@@ -420,19 +412,15 @@ export default function ViewAssessment() {
           ))}
         </div>
       )}
-        </div>
-      </div>
 
       {/* ── Content ── */}
-      <div className="lg:container lg:mx-auto lg:px-6 px-4 py-6">
-        <div className="max-w-3xl mx-auto space-y-5 pb-16">
-          {loading && !localAssessment ? (
+      {initializing || (loading && !localAssessment) ? (
         <LoadingSkeleton />
       ) : !localAssessment ? (
         <div className="rounded-lg border border-dashed bg-card p-12 flex flex-col items-center gap-3 text-center">
           <ClipboardList className="h-8 w-8 text-muted-foreground/40" />
           <p className="text-sm text-muted-foreground">No assessment has been created for this course yet.</p>
-              <Button size="sm" variant="outline" onClick={() => navigate(`/admin/courses/${courseId}/assessment`)}>
+          <Button size="sm" variant="outline" onClick={onModify}>
             <NotebookPen className="h-4 w-4 mr-2" />
             Create Assessment
           </Button>
@@ -478,7 +466,5 @@ export default function ViewAssessment() {
         <SessionsTab sessions={sessions} loading={loading} />
       )}
     </div>
-      </div>
-    </div>
   );
 }

src/modules/admin/components/courses/CourseAssessmentPanel.jsx

@@ -0,0 +1,31 @@
+import { useState } from "react";
+import AssessmentOverview from "./AssessmentOverview";
+import AssessmentEditor from "./AssessmentEditor";
+
+export default function CourseAssessmentPanel({ courseId }) {
+  const [mode, setMode] = useState("overview"); // "overview" | "edit"
+  const [overviewKey, setOverviewKey] = useState(0); // bump to force AssessmentOverview to refetch
+
+  const backToOverview = () => {
+    setOverviewKey((k) => k + 1);
+    setMode("overview");
+  };
+
+  if (mode === "edit") {
+    return (
+      <AssessmentEditor
+        courseId={courseId}
+        onSaved={backToOverview}
+        onCancel={backToOverview}
+      />
+    );
+  }
+
+  return (
+    <AssessmentOverview
+      key={overviewKey}
+      courseId={courseId}
+      onModify={() => setMode("edit")}
+    />
+  );
+}

src/modules/admin/components/courses/CourseTable.jsx

@@ -72,9 +72,6 @@ export default function CoursesTable() {
   };
 
   const rowActions = buildRowActions({
-    onViewAssessment: (row) => navigate(`/admin/courses/${row.course_id}/assessment/view`),
-    onAssessment: (row) => navigate(`/admin/courses/${row.course_id}/assessment`),
-    onViewUnits: (row) => navigate(`/admin/courses/${row.course_id}/units`),
     onView: (row) => navigate(`/admin/courses/${row.course_id}/view`),
     onEdit: (row) => navigate(`/admin/courses/${row.course_id}/edit`),
     onArchive: (row) => setArchiveTarget(row),

src/modules/admin/components/courses/UnitsTable.jsx

@@ -8,8 +8,6 @@ import { useAuth } from "@/contexts/AuthContext";
 import DataTable from "@/components/generic/Table/DataTable";
 import { FilterSheet } from "@/components/generic/Sheet/FilterSheet";
 import { ArchiveDialog } from "@/components/generic/Dialogs/ArchiveDialog";
-import AttachUnitsDialog from "../library/AttachUnitsDialog";
-import { Link2 } from "lucide-react";
 
 import { buildDataColumns, columnPinning } from "../../config/courses/units/columns.config";
 import { buildToolbarActions } from "../../config/courses/units/toolbar.config";
@@ -22,7 +20,6 @@ import { formatGeneratedBy } from "@/utils/generatedBy.util";
 export default function UnitsTable({ courseId, returnTo }) {
   const [archiveTarget, setArchiveTarget] = useState(null);
   const [archiveIds, setArchiveIds] = useState(null);
-  const [attachOpen, setAttachOpen] = useState(false);
 
   const tableRefsRef = useRef({
     getFilters: () => [],
@@ -65,8 +62,7 @@ export default function UnitsTable({ courseId, returnTo }) {
     onArchive: (row) => setArchiveTarget(row),
   }), [courseId]);
 
-  const toolbarActions = [
-    ...buildToolbarActions({
+  const toolbarActions = buildToolbarActions({
     fetchUnits: (params) => fetchUnits(courseId, params),
     pagination,
     exportConfig,
@@ -76,22 +72,7 @@ export default function UnitsTable({ courseId, returnTo }) {
     getFilters: () => tableRefsRef.current.getFilters(),
     getSort: () => tableRefsRef.current.getSort(),
     getTableInstance: () => tableRefsRef.current.tableInstance,
-    }),
-    // Junction revamp — units live standalone in the library; attach without re-creating
-    {
-      key: "attach-existing",
-      type: "button",
-      label: "Attach Existing",
-      icon: <Link2 className="h-3.5 w-3.5" />,
-      variant: "outline",
-      onClick: () => setAttachOpen(true),
-    },
-  ];
-
-  const handleAttachUnits = async (unitIds) => {
-    await api.post(`/admin/courses/${courseId}/units/attach`, { unit_ids: unitIds });
-    fetchUnits(courseId, { page: 1, limit: pagination?.limit ?? 10 });
-  };
+  });
 
   const selectionActions = buildSelectionActions({
     exportConfig,
@@ -174,15 +155,6 @@ export default function UnitsTable({ courseId, returnTo }) {
         loading={loading}
         onSuccess={handleArchiveSuccess}
       />
-
-      {/* ── Attach existing library units ── */}
-      <AttachUnitsDialog
-        open={attachOpen}
-        onOpenChange={setAttachOpen}
-        attachedUnitIds={units.map((u) => u.unit_id)}
-        onAttach={handleAttachUnits}
-        loading={loading}
-      />
     </>
   );
 }

src/modules/admin/config/courses/rowActions.config.jsx

@@ -1,6 +1,6 @@
-import { Eye, Archive, ShelvingUnit, NotebookPen, ClipboardList, PlusCircle, ArrowUp, ArrowDown } from "lucide-react";
+import { Eye, Archive, ArrowUp, ArrowDown } from "lucide-react";
 
-export function buildRowActions({ onViewUnits, onView, onEdit, onArchive, onAssessment, onViewAssessment, onMoveUp, onMoveDown, courses = [] }) {
+export function buildRowActions({ onView, onEdit, onArchive, onMoveUp, onMoveDown, courses = [] }) {
   return [
     {
       key: "view",
@@ -23,38 +23,6 @@ export function buildRowActions({ onViewUnits, onView, onEdit, onArchive, onAsse
       onClick: (row) => onMoveDown(row),
       disabled: (row) => courses.findIndex((c) => c.course_id === row.course_id) >= courses.length - 1,
     },
-    {
-      key: "view_units",
-      label: "View Units",
-      icon: <ShelvingUnit className="h-3.5 w-3.5" />,
-      className: "text-sky-700 hover:text-sky-600",
-      onClick: (row) => onViewUnits(row),
-      separator: true,
-    },
-    {
-      key: "create_assessment",
-      label: "Create Assessment",
-      icon: <PlusCircle className="h-3.5 w-3.5" />,
-      className: "text-purple-700 hover:text-purple-600",
-      onClick: (row) => onAssessment(row),
-      hidden: (row) => !!row.assessment_id,
-    },
-    {
-      key: "view_assessment",
-      label: "View Assessment",
-      icon: <ClipboardList className="h-3.5 w-3.5" />,
-      className: "text-purple-700 hover:text-purple-600",
-      onClick: (row) => onViewAssessment(row),
-      hidden: (row) => !row.assessment_id,
-    },
-    {
-      key: "modify_assessment",
-      label: "Modify Assessment",
-      icon: <NotebookPen className="h-3.5 w-3.5" />,
-      className: "text-purple-700 hover:text-purple-600",
-      onClick: (row) => onAssessment(row),
-      hidden: (row) => !row.assessment_id,
-    },
     {
       key: "archive",
       label: "Archive Course",

src/modules/admin/pages/courses/ViewCourse.jsx

@@ -3,13 +3,15 @@ import { useNavigate, useParams } from "react-router-dom";
 import {
   ArrowLeft, Pencil, Clock, BookOpen, Layers,
   BadgeCheck, Tag, Star, Lock, ListChecks, BarChart2,
-  Trophy, Users, Award,
+  Trophy, Users, Award, ClipboardList,
 } from "lucide-react";
 
 import { useCourses } from "@/contexts/AdminCoursesContext";
 import { useDateFormat } from "@/hooks/useDateFormat";
 import { PageMeta } from "@/contexts/MetadataContext";
 import CourseReadingProgressList from "../../components/courses/CourseReadingProgressList";
+import UnitsTable from "../../components/courses/UnitsTable";
+import CourseAssessmentPanel from "../../components/courses/CourseAssessmentPanel";
 import CourseBadge from "@/modules/admin/components/courses/CourseBadge";
 import api from "@/utils/api.util";
 import { Button } from "@/components/ui/button";
@@ -296,8 +298,12 @@ function CourseDetailsTab({ course, loading, instructors, achievementKeys, achie
 const TABS = [
   { key: "details",    label: "Course Details",   icon: BookOpen      },
   { key: "progress",   label: "Reading Progress",  icon: BarChart2     },
+  { key: "units",      label: "Units",             icon: Layers        },
+  { key: "assessment", label: "Assessment",        icon: ClipboardList },
 ];
 
+const WIDE_TABS = new Set(["units", "assessment"]);
+
 // ─── Page ─────────────────────────────────────────────────────────────────────
 
 export default function ViewCourse() {
@@ -406,7 +412,7 @@ export default function ViewCourse() {
 
       {/* ── Content ── */}
       <div className="lg:container lg:mx-auto lg:px-6 px-4 py-6">
-        <div className="max-w-3xl mx-auto pb-16">
+        <div className={WIDE_TABS.has(activeTab) ? "pb-16" : "max-w-3xl mx-auto pb-16"}>
           {activeTab === "details" && (
             <CourseDetailsTab
               course={course}
@@ -420,6 +426,12 @@ export default function ViewCourse() {
           {activeTab === "progress" && (
             <CourseReadingProgressList courseId={courseId} />
           )}
+          {activeTab === "units" && (
+            <UnitsTable courseId={courseId} />
+          )}
+          {activeTab === "assessment" && (
+            <CourseAssessmentPanel courseId={courseId} />
+          )}
         </div>
       </div>
     </div>

src/modules/admin/pages/courses/units/AddUnit.jsx

@@ -3,12 +3,13 @@ import { useNavigate, useParams, useLocation } from "react-router-dom";
 import { useForm } from "react-hook-form";
 import { z } from "zod";
 import { zodResolver } from "@hookform/resolvers/zod";
-import { ChevronLeft, ChevronRight, Check, FileText, ListChecks } from "lucide-react";
+import { ChevronLeft, ChevronRight, Check, FileText, ListChecks, Link2, Plus } from "lucide-react";
 
 import { useCourses } from "@/contexts/AdminCoursesContext";
 import { useAuth } from "@/contexts/AuthContext";
 import { PageMeta } from "@/contexts/MetadataContext";
 import { cn } from "@/lib/utils";
+import api from "@/utils/api.util";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -16,6 +17,7 @@ import { Textarea } from "@/components/ui/textarea";
 import { Spinner } from "@/components/ui/spinner";
 import { useUnsavedChangesGuard } from "@/hooks/useUnsavedChangesGuard";
 import DraftRequirementsEditor from "@/modules/admin/components/courses/DraftRequirementsEditor";
+import AttachUnitsDialog from "@/modules/admin/components/library/AttachUnitsDialog";
 
 const schema = z.object({
   title: z.string().min(1, "Title is required."),
@@ -42,8 +44,10 @@ export default function AddUnit() {
 
   const backTarget = location.state?.returnTo ?? `/admin/courses/${courseId}/units`;
 
+  const [mode, setMode] = useState(null); // null | "create" — the Details/Requirements form only shows once "Create" is chosen
   const [step, setStep] = useState(0);
   const [requirements, setRequirements] = useState([]);
+  const [attachOpen, setAttachOpen] = useState(false);
 
   const { register, trigger, getValues, formState: { errors, isDirty } } = useForm({
     resolver: zodResolver(schema),
@@ -89,7 +93,7 @@ export default function AddUnit() {
               type="button"
               variant="ghost"
               size="icon"
-              onClick={() => (step === 0 ? navigate(backTarget) : setStep(0))}
+              onClick={() => (mode === "create" && step > 0 ? setStep(0) : navigate(backTarget))}
             >
               <ChevronLeft className="h-4 w-4" />
             </Button>
@@ -101,6 +105,23 @@ export default function AddUnit() {
             </div>
           </div>
 
+          {/* Select existing vs. create new */}
+          <div className="flex items-start justify-between gap-3 pb-3 border-b border-border">
+            <p className="text-xs text-muted-foreground">
+              Attach an existing library unit to reuse its content, or create a new one from scratch.
+            </p>
+            <div className="flex items-center gap-2 shrink-0">
+              <Button type="button" variant="outline" size="sm" onClick={() => setAttachOpen(true)}>
+                <Link2 className="h-3.5 w-3.5 mr-1.5" /> Select
+              </Button>
+              <Button type="button" variant="outline" size="sm" onClick={() => setMode("create")}>
+                <Plus className="h-3.5 w-3.5 mr-1.5" /> Create
+              </Button>
+            </div>
+          </div>
+
+          {mode === "create" && (
+            <>
               {/* Stepper */}
               <div className="flex items-center gap-0">
                 {STEPS.map((s, i) => {
@@ -196,10 +217,24 @@ export default function AddUnit() {
                   </Button>
                 )}
               </div>
+            </>
+          )}
         </div>
       </div>
 
       {unsavedChangesDialog}
+
+      <AttachUnitsDialog
+        open={attachOpen}
+        onOpenChange={setAttachOpen}
+        attachedUnitIds={course?.units?.map((u) => u.unit_id) ?? []}
+        onAttach={async (unitIds) => {
+          await api.post(`/admin/courses/${courseId}/units/attach`, { unit_ids: unitIds });
+          bypassOnce();
+          navigate(backTarget);
+        }}
+        loading={loading}
+      />
     </section>
   );
 }

src/modules/admin/pages/library/units/AddLibraryUnit.jsx

@@ -7,7 +7,7 @@ import { nanoid } from "nanoid";
 import {
   ArrowLeft, ChevronLeft, ChevronRight, Check,
   FileText, BookOpen, LayoutTemplate, ClipboardCheck, ListChecks,
-  Plus, Trash2,
+  Plus, Trash2, Link2,
 } from "lucide-react";
 
 import { useLibrary } from "@/contexts/AdminLibraryContext";
@@ -33,6 +33,7 @@ import {
 } from "@/components/ui/drawer";
 import { BlockList, DEFAULT_CONTENT } from "@/components/generic/BlockList";
 import { AddBlockMenu } from "@/components/generic/AddBlockMenu";
+import AttachLessonsDialog from "@/modules/admin/components/library/AttachLessonsDialog";
 import { PreviewContent, PreviewChrome } from "../../../components/courses/LessonsPreview";
 import { useUnsavedChangesGuard } from "@/hooks/useUnsavedChangesGuard";
 
@@ -167,17 +168,54 @@ function LessonObjectives({ control, register, lessonIndex }) {
   );
 }
 
-function StepLessons({ control, register, errors }) {
+function StepLessons({ control, register, errors, existingLessons, onRemoveExisting, onOpenAttach }) {
   const { fields, append, remove } = useFieldArray({ control, name: "lessons" });
 
   return (
     <div className="space-y-4">
-      {fields.length === 0 && (
+      <div className="flex items-start justify-between gap-3 pb-3 border-b border-border">
+        <p className="text-xs text-muted-foreground">
+          Attach existing library lessons to reuse content, or create new ones from scratch.
+        </p>
+        <div className="flex items-center gap-2 shrink-0">
+          <Button type="button" variant="outline" size="sm" onClick={onOpenAttach}>
+            <Link2 className="h-3.5 w-3.5 mr-1.5" /> Select
+          </Button>
+          <Button
+            type="button"
+            variant="outline"
+            size="sm"
+            onClick={() => append({ title: "", description: "", objectives: [], blocks: [] })}
+          >
+            <Plus className="h-3.5 w-3.5 mr-1.5" /> Create
+          </Button>
+        </div>
+      </div>
+
+      {fields.length === 0 && existingLessons.length === 0 && (
         <p className="text-sm text-muted-foreground">
           No lessons yet. A unit can be created without any, but add one now if you'd like to build its content in this wizard.
         </p>
       )}
 
+      {existingLessons.map((l) => (
+        <div key={l.lesson_id} className="border border-border rounded-lg p-4 flex items-center justify-between gap-3">
+          <div className="flex items-center gap-2 min-w-0">
+            <span className="text-sm font-medium truncate">{l.title}</span>
+            <Badge variant="outline" className="text-[10px] shrink-0">existing</Badge>
+          </div>
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            className="text-destructive h-7 px-2 shrink-0"
+            onClick={() => onRemoveExisting(l.lesson_id)}
+          >
+            Remove
+          </Button>
+        </div>
+      ))}
+
       {fields.map((f, i) => (
         <div key={f.id} className="border border-border rounded-lg p-4 space-y-3">
           <div className="flex items-center justify-between">
@@ -207,15 +245,6 @@ function StepLessons({ control, register, errors }) {
           <LessonObjectives control={control} register={register} lessonIndex={i} />
         </div>
       ))}
-
-      <Button
-        type="button"
-        variant="outline"
-        className="w-full"
-        onClick={() => append({ title: "", description: "", objectives: [], blocks: [] })}
-      >
-        <Plus className="h-4 w-4 mr-1" /> Add Lesson
-      </Button>
     </div>
   );
 }
@@ -355,7 +384,7 @@ function SummaryRow({ label, value }) {
   );
 }
 
-function StepReview({ data, tierCategories, requirements }) {
+function StepReview({ data, tierCategories, requirements, existingLessons }) {
   const tierName = tierCategories.find((c) => c.slug === data.subscription)?.name;
 
   return (
@@ -370,6 +399,20 @@ function StepReview({ data, tierCategories, requirements }) {
         <SummaryRow label="Subscription" value={tierName || "No tier gate (open)"} />
       </div>
 
+      {existingLessons.length > 0 && (
+        <div className="border border-border rounded-lg p-4 space-y-3">
+          <div className="flex items-center gap-2">
+            <Link2 className="h-4 w-4 text-muted-foreground" />
+            <span className="text-sm font-medium">Attached from library ({existingLessons.length})</span>
+          </div>
+          {existingLessons.map((l, i) => (
+            <div key={l.lesson_id} className="flex items-center justify-between text-sm border-t border-border pt-2 first:border-t-0 first:pt-0">
+              <span>{i + 1}. {l.title}</span>
+            </div>
+          ))}
+        </div>
+      )}
+
       {(data.lessons ?? []).length === 0 ? (
         <p className="text-sm text-muted-foreground">No lessons will be created with this unit.</p>
       ) : (
@@ -409,7 +452,7 @@ function StepRequirements({ requirements, setRequirements }) {
 // ─── Main Page ──────────────────────────────────────────────────────────────
 export default function AddLibraryUnit() {
   const navigate = useNavigate();
-  const { createUnitFull, loading } = useLibrary();
+  const { createUnitFull, attachLessonsToUnit, lessonsFlat, loading } = useLibrary();
   const { user } = useAuth();
 
   const { syncUnitRequirements } = useCourses();
@@ -417,6 +460,8 @@ export default function AddLibraryUnit() {
   const [step, setStep] = useState(0);
   const [requirements, setRequirements] = useState([]);
   const [tierCategories, setTierCategories] = useState([]);
+  const [existingLessons, setExistingLessons] = useState([]);
+  const [attachLessonsOpen, setAttachLessonsOpen] = useState(false);
 
   useEffect(() => {
     api.get("/admin/tiers/categories")
@@ -473,6 +518,10 @@ export default function AddLibraryUnit() {
     const newUnitId = result?.data?.data?.unit_id;
     if (!newUnitId) return;
 
+    if (existingLessons.length > 0) {
+      await attachLessonsToUnit(newUnitId, existingLessons.map((l) => l.lesson_id));
+    }
+
     if (requirements.length > 0) {
       const clean = requirements.map(({ _key, ...r }) => r);
       await syncUnitRequirements(null, newUnitId, clean);
@@ -551,7 +600,16 @@ export default function AddLibraryUnit() {
               />
             )}
             {step === 1 && (
-              <StepLessons control={control} register={register} errors={errors} />
+              <StepLessons
+                control={control}
+                register={register}
+                errors={errors}
+                existingLessons={existingLessons}
+                onRemoveExisting={(lessonId) =>
+                  setExistingLessons((prev) => prev.filter((l) => l.lesson_id !== lessonId))
+                }
+                onOpenAttach={() => setAttachLessonsOpen(true)}
+              />
             )}
             {step === 2 && (
               <StepPageBuilder control={control} setValue={setValue} />
@@ -560,7 +618,12 @@ export default function AddLibraryUnit() {
               <StepRequirements requirements={requirements} setRequirements={setRequirements} />
             )}
             {step === 4 && (
-              <StepReview data={getValues()} tierCategories={tierCategories} requirements={requirements} />
+              <StepReview
+                data={getValues()}
+                tierCategories={tierCategories}
+                requirements={requirements}
+                existingLessons={existingLessons}
+              />
             )}
           </div>
 
@@ -590,6 +653,19 @@ export default function AddLibraryUnit() {
         </div>
       </div>
 
+      <AttachLessonsDialog
+        open={attachLessonsOpen}
+        onOpenChange={setAttachLessonsOpen}
+        attachedLessonIds={existingLessons.map((l) => l.lesson_id)}
+        onAttach={(lessonIds) => {
+          const picked = lessonIds
+            .map((id) => lessonsFlat.find((l) => l.lesson_id === id))
+            .filter(Boolean)
+            .map((l) => ({ lesson_id: l.lesson_id, title: l.title }));
+          setExistingLessons((prev) => [...prev, ...picked]);
+        }}
+      />
+
       {unsavedChangesDialog}
     </section>
   );

src/modules/admin/routes/AdminRoutes.jsx

@@ -55,8 +55,6 @@ import ArchivedLessonsList from '../pages/courses/lessons/ArchivedLessonsList'
 // Lesson Page Builder
 import LessonPageBuilder from '../pages/courses/lessons/LessonPageBuilder'
 import ViewLessonPage from '../pages/courses/lessons/ViewLessonPage'
-import CourseAssessment from '../pages/courses/CourseAssessment'
-import ViewAssessment from '../pages/courses/ViewAssessment'
 import ModifyQuiz from '../pages/courses/units/ModifyQuiz'
 import ViewUnitQuiz from '../pages/courses/units/ViewUnitQuiz'
 
@@ -194,8 +192,6 @@ export const AdminRoutes = {
             { path: 'add', element: <AddCourse /> },
             { path: ':courseId/view', element: <ViewCourse /> },
             { path: ':courseId/edit', element: <EditCourse /> },
-            { path: ":courseId/assessment", element: <CourseAssessment /> },
-            { path: ":courseId/assessment/view", element: <ViewAssessment /> },
 
             // Categories
             {