feat(ui): implement full UI layer for all modules

Add interactive island components and server partials for notes,
students, and admin modules, following the Figma prototype design.

- static/styles/ui.css: shared component library (buttons, tables,
  chips, cards, filters, tabs, form inputs)
- notes: NotesView (student grade view with UE cards, promo tabs,
  weighted averages), AdminConsultNotes, AdminUEs islands + partials
- students: ConsultStudents (list/filter/delete), AdminPromotions
  (CRUD) islands + partials
- admin: AdminModules, AdminUsers, AdminRoles islands + partials
- All partials use State type with unknown cast for session access

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

routes/(apps)/notes/partials/(admin)/courses.tsx

@@ -3,11 +3,12 @@ import {
   makePartials,
 } from "$root/defaults/makePartials.tsx";
 import { FreshContext } from "$fresh/server.ts";
-import { State } from "$root/routes/_middleware.ts";
+import { State } from "$root/defaults/interfaces.ts";
+import AdminConsultNotes from "../../(_islands)/AdminConsultNotes.tsx";
 
 // deno-lint-ignore require-await
-async function Courses(_request: Request, context: FreshContext<State>) {
-  return <h2>Welcome to {context.state.session?.displayName}.</h2>;
+async function Courses(_request: Request, _context: FreshContext<State>) {
+  return <AdminConsultNotes />;
 }
 
 export const config = getPartialsConfig();

routes/(apps)/notes/partials/(admin)/ues.tsx

@@ -0,0 +1,18 @@
+import {
+  getPartialsConfig,
+  makePartials,
+} from "$root/defaults/makePartials.tsx";
+import { FreshContext } from "$fresh/server.ts";
+import { State } from "$root/defaults/interfaces.ts";
+import AdminUEs from "../../(_islands)/AdminUEs.tsx";
+
+// deno-lint-ignore require-await
+async function UEs(
+  _request: Request,
+  _context: FreshContext<State>,
+) {
+  return <AdminUEs />;
+}
+
+export const config = getPartialsConfig();
+export default makePartials(UEs);

routes/(apps)/notes/partials/index.tsx

@@ -3,11 +3,53 @@ import {
   makePartials,
 } from "$root/defaults/makePartials.tsx";
 import { FreshContext } from "$fresh/server.ts";
-import { State } from "$root/routes/_middleware.ts";
+import { State } from "$root/defaults/interfaces.ts";
 
 // deno-lint-ignore require-await
-export async function Index(_request: Request, context: FreshContext<State>) {
-  return <h2>Welcome to {context.state.session?.displayName}.</h2>;
+export async function Index(
+  _request: Request,
+  context: FreshContext<State>,
+) {
+  const isEmployee =
+    (context.state as unknown as { session: Record<string, string> }).session
+      .eduPersonPrimaryAffiliation === "employee";
+
+  return (
+    <div class="page-content">
+      <h2 class="page-title">PolyNotes</h2>
+      <p>
+        Bienvenue{" "}
+        <strong>
+          {(context.state as unknown as { session: Record<string, string> })
+            .session.displayName}
+        </strong>
+        .
+      </p>
+      {isEmployee
+        ? (
+          <p>
+            Consultez les{" "}
+            <a href="/notes/courses" f-partial="/notes/partials/courses">
+              notes des élèves
+            </a>{" "}
+            ou gérez les{" "}
+            <a href="/notes/ues" f-partial="/notes/partials/ues">
+              UEs
+            </a>
+            .
+          </p>
+        )
+        : (
+          <p>
+            Consultez vos{" "}
+            <a href="/notes/notes" f-partial="/notes/partials/notes">
+              notes
+            </a>
+            .
+          </p>
+        )}
+    </div>
+  );
 }
 
 export const config = getPartialsConfig();

routes/(apps)/notes/partials/notes.tsx

@@ -1,13 +1,36 @@
+import { FreshContext } from "$fresh/server.ts";
+import { db } from "$root/databases/db.ts";
+import { students } from "$root/databases/schema.ts";
+import { and, eq } from "npm:drizzle-orm@0.45.2";
 import {
   getPartialsConfig,
   makePartials,
 } from "$root/defaults/makePartials.tsx";
-import { FreshContext } from "$fresh/server.ts";
-import { State } from "$root/routes/_middleware.ts";
+import { State } from "$root/defaults/interfaces.ts";
+import NotesView from "../(_islands)/NotesView.tsx";
 
-// deno-lint-ignore require-await
-async function Notes(_request: Request, context: FreshContext<State>) {
-  return <h2>Welcome to {context.state.session?.displayName}.</h2>;
+async function Notes(
+  _request: Request,
+  context: FreshContext<State>,
+) {
+  const session =
+    (context.state as unknown as { session: { sn: string; givenName: string } })
+      .session;
+  const { sn, givenName } = session;
+
+  let numEtud: number | null = null;
+  try {
+    const student = await db
+      .select()
+      .from(students)
+      .where(and(eq(students.nom, sn), eq(students.prenom, givenName)))
+      .then((rows) => rows[0] ?? null);
+    numEtud = student?.numEtud ?? null;
+  } catch {
+    // DB lookup failed — island will show fallback message
+  }
+
+  return <NotesView numEtud={numEtud} prenom={session.givenName} />;
 }
 
 export const config = getPartialsConfig();