fix height problems

package.json

@@ -31,7 +31,11 @@
     "@fortawesome/react-fontawesome": "^3.3.1",
     "@gsap/react": "^2.1.2",
     "@hookform/resolvers": "^5.4.0",
+    "@mdx-js/mdx": "^3.1.1",
+    "@mdx-js/react": "^3.1.1",
+    "@mdx-js/loader": "^3.1.1",
     "@neondatabase/serverless": "^1.1.0",
+    "@next/mdx": "^16.2.9",
     "@radix-ui/react-accordion": "^1.2.12",
     "@radix-ui/react-alert-dialog": "^1.1.15",
     "@radix-ui/react-aspect-ratio": "^1.1.8",
@@ -67,6 +71,7 @@
     "@trpc/next": "^11.17.0",
     "@trpc/react-query": "^11.17.0",
     "@trpc/server": "^11.17.0",
+    "@types/mdx": "^2.0.14",
     "@uiw/react-md-editor": "^4.1.1",
     "@uploadthing/react": "^7.3.3",
     "@vercel/speed-insights": "^2.0.0",
@@ -94,7 +99,6 @@
     "react-day-picker": "^10.0.1",
     "react-dom": "^19.2.6",
     "react-hook-form": "^7.77.0",
-    "react-markdown": "^10.1.0",
     "react-resizable-panels": "^4.11.2",
     "recharts": "3.8.1",
     "rehype-highlight": "^7.0.2",
@@ -103,6 +107,7 @@
     "server-only": "^0.0.1",
     "shadcn": "^4.10.0",
     "sonner": "^2.0.7",
+    "superjson": "^2.2.6",
     "tailwind-merge": "^3.6.0",
     "tailwindcss-motion": "^1.1.1",
     "type-fest": "^5.7.0",

src/app/_components/Animated/AnimateIn.tsx

@@ -1,3 +1,4 @@
+"use client"
 import { useRef, type HTMLAttributes, type ReactNode } from "react";
 import { SplitText } from "gsap/SplitText";
 import gsap from 'gsap'
@@ -11,6 +12,7 @@ const AnimateTextIn = ({
   speed = 1,
   scrollOnly = false,
   once = false,
+  debugId,
   className
 }: {
   children: ReactNode,
@@ -18,6 +20,7 @@ const AnimateTextIn = ({
   position?: gsap.Position,
   scrollOnly?: boolean,
   once?: boolean,
+  debugId?: string,
   speed?: number,
   className?: HTMLAttributes<HTMLDivElement>['className']
 }) => {
@@ -26,7 +29,7 @@ const AnimateTextIn = ({
     position,
     scrollOnly,
     once,
-    debugId: `text-${position}`,
+    debugId: debugId ?? `text-${position}`,
     makeReveal: (node) => {
       // The wrapper starts at opacity 0 (so there's no flash of unsplit text);
       // reveal the wrapper and let the per-character tween do the animation.

src/app/_components/Animated/AnimatePopUp.tsx

@@ -9,6 +9,7 @@ const AnimatePopUp = ({
   ease='elastic',
   scrollOnly=false,
   once=false,
+  debugId,
 }:{
     children:ReactNode
     position:gsap.Position,
@@ -17,9 +18,10 @@ const AnimatePopUp = ({
     ease?:gsap.EaseString|gsap.EaseFunction,
     scrollOnly?:boolean,
     once?:boolean,
+    debugId?:string,
   }) => {
   return (
-    <AnimatedDiv children={children} position={position} scrollOnly={scrollOnly} once={once} className={cn(className,'h-0 translate-y-[50] overflow-hidden')} height='auto' y={0} overflow='' ease={ease} duration={duration} />
+    <AnimatedDiv children={children} position={position} scrollOnly={scrollOnly} once={once} debugId={debugId} className={cn(className,'h-0 translate-y-[50] overflow-hidden')} height='auto' y={0} overflow='' ease={ease} duration={duration} />
   )
 }
 

src/app/_components/Animated/AnimatedDiv.tsx

@@ -1,3 +1,4 @@
+"use client"
 import gsap from "gsap";
 import { type HTMLAttributes, type ReactNode, useRef } from "react";
 import { useReveal } from "./useReveal";

src/app/_components/Animated/useReveal.ts

@@ -3,7 +3,7 @@
 import { useGSAP } from "@gsap/react"
 import { ScrollTrigger } from "gsap/all"
 import type { RefObject } from "react"
-import { GSAP_DEBUG, useGsapContext } from "~/app/_providers/GsapProvicer"
+import { GSAP_DEBUG, nearestScroller, useGsapContext } from "~/app/_providers/GsapProvicer"
 
 export type UseRevealOptions = {
   position: gsap.Position
@@ -39,9 +39,12 @@ export function useReveal(
   const ctx = useGsapContext()
   useGSAP(() => {
     const el = ref.current
-    if (!el || !ctx) return
+    if (!el || !ctx) {
+      if (GSAP_DEBUG) console.log("[cv-debug][useReveal:skip]", { debugId, hasEl: !!el, hasCtx: !!ctx })
+      return
+    }
 
-    const scroller = ctx.getScroller()
+    const scroller = nearestScroller(el)
     const scrollerEl = scroller instanceof Element ? scroller : undefined
 
     const rect = el.getBoundingClientRect()
@@ -53,6 +56,28 @@ export function useReveal(
       bottom = r.top + r.height
     }
     const isInView = rect.bottom > top && rect.top < bottom
+    if (GSAP_DEBUG) {
+      const scrollerRect = scrollerEl?.getBoundingClientRect()
+      console.log("[cv-debug][useReveal:register]", {
+        debugId,
+        position,
+        scrollOnly,
+        once,
+        isInView,
+        rect: { top: rect.top, bottom: rect.bottom, height: rect.height },
+        viewport: { top, bottom },
+        scroller:
+          scroller === window
+            ? "window"
+            : {
+                slot: scrollerEl?.getAttribute("data-slot"),
+                className: scrollerEl?.className,
+                clientHeight: scrollerEl?.clientHeight,
+                scrollHeight: scrollerEl?.scrollHeight,
+                rect: scrollerRect ? { top: scrollerRect.top, bottom: scrollerRect.bottom, height: scrollerRect.height } : undefined,
+              },
+      })
+    }
 
     const reveal = makeReveal(el)
     // A reveal that animates height (pop-ups) shifts every trigger below it.
@@ -83,19 +108,26 @@ export function useReveal(
     if (isInView && !scrollOnly) {
       // The shared timeline only decides *when* the entrance starts; the reveal
       // plays independently so the ScrollTrigger can take it over afterwards.
+      if (GSAP_DEBUG) console.log("[cv-debug][useReveal:schedule]", { debugId, position })
       ctx.schedule(() => reveal.play(), position)
       // `once` elements keep their revealed state — no scroll trigger at all.
-      if (!once) ctx.onReady(addReplayTrigger)
+      if (!once) {
+        if (GSAP_DEBUG) console.log("[cv-debug][useReveal:onReady]", { debugId })
+        ctx.onReady(addReplayTrigger)
+      }
     } else if (isInView) {
       // scrollOnly + already on screen: no enter crossing will fire, so reveal
       // now. Keep a trigger for scroll-out unless this is a `once` element.
+      if (GSAP_DEBUG) console.log("[cv-debug][useReveal:play-now]", { debugId, position })
       reveal.play()
       if (!once) addReplayTrigger()
     } else if (once) {
       // Off-screen: reveal when first reached, then self-destruct so it never
       // reverses.
+      if (GSAP_DEBUG) console.log("[cv-debug][useReveal:scroll-once]", { debugId, position })
       ScrollTrigger.create({ ...baseTrigger, once: true, onEnter: () => reveal.play() })
     } else {
+      if (GSAP_DEBUG) console.log("[cv-debug][useReveal:scroll-trigger-only]", { debugId, position })
       addReplayTrigger()
     }
   }, { dependencies: [] })

src/app/_components/Form/Fields/MdeFormField.tsx

@@ -8,6 +8,7 @@ import type { Control, FieldValues, Path } from "react-hook-form";
 import { FormControl, FormField, FormItem, FormLabel } from "~/components/ui/form";
 import { Button } from "~/components/ui/button";
 import { cn } from "~/lib/utils";
+import { ClientMdx } from "~/components/ClientMdx";
 import {
   InternalLinkTextarea,
   type AutocompleteTriggerConfig,
@@ -81,7 +82,7 @@ export default function MdeFormField<T extends FieldValues>(params: {
                   ),
                   preview: params.renderPreview
                     ? (source) => params.renderPreview?.(source) ?? <></>
-                    : undefined,
+                    : (source) => <ClientMdx source={source} fallback={source} />,
                 }}
               />
             </FormControl>

src/app/_providers/GsapProvicer.tsx

@@ -20,6 +20,25 @@ ScrollTrigger.config({ ignoreMobileResize: true })
 // element and mount the GSDevTools timeline scrubber. Handy for seeing exactly
 // where each card's enter/exit lines sit relative to the viewport.
 export const GSAP_DEBUG = false
+
+export function nearestScroller(el: Element): Element | Window {
+  let node: Element | null = el.parentElement
+  while (node) {
+    if (node.getAttribute('data-slot') === 'scroll-area-viewport') {
+      const viewport = node as HTMLElement
+      const rect = viewport.getBoundingClientRect()
+      const hasUsableBox = rect.width > 0 && rect.height > 0
+      const canScroll =
+        viewport.scrollHeight > viewport.clientHeight ||
+        viewport.scrollWidth > viewport.clientWidth
+
+      if (hasUsableBox && canScroll) return viewport
+    }
+    node = node.parentElement
+  }
+  return window
+}
+
 const GsapContext = createContext<{
   // Add a real animation (with its own duration) to the entrance timeline.
   addAnimation: (
@@ -47,14 +66,24 @@ export function useGsapContext() {
 export const useTimeLine = (dep:any,all?:boolean) => {
   const gsapContext = useGsapContext()
     useEffect(() => {
+      if (GSAP_DEBUG) {
+        console.log("[cv-debug][useTimeLine:effect]", {
+          hasDep: !!dep,
+          isArray: dep instanceof Array,
+          length: dep instanceof Array ? dep.length : undefined,
+          all,
+        })
+      }
       if (dep instanceof Array && all) {
         let acc = true;
         let allDepsSatisfied = dep.reduce((p,c) => c !== undefined && p ,acc )
         if (allDepsSatisfied) {
+          if (GSAP_DEBUG) console.log("[cv-debug][useTimeLine:resume-all]")
           gsapContext?.resumeTimeline()
         }
       } else {
         if (dep) {
+          if (GSAP_DEBUG) console.log("[cv-debug][useTimeLine:resume]")
           gsapContext?.resumeTimeline()
         }
       }
@@ -100,7 +129,7 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
       devToolsCreated.current = true
       GSDevTools.create({ animation: tl.current })
     }
-    return () => { console.log("gsap cleanup") }
+    return () => { if (GSAP_DEBUG) console.log("gsap cleanup") }
   })
 
   // Handoff: fire registered callbacks once, when the entrance finishes.
@@ -108,11 +137,19 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
   const readyCbs = useRef<Array<() => void>>([])
   const fireReady = useCallback(() => {
     if (readyFired.current) return
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:ready]", {
+        callbacks: readyCbs.current.length,
+        duration: tl.current?.duration(),
+        progress: tl.current?.progress(),
+      })
+    }
     readyFired.current = true
     readyCbs.current.forEach((cb) => cb())
     readyCbs.current = []
   },[])
   const onReady = useCallback((cb: () => void) => {
+    if (GSAP_DEBUG) console.log("[cv-debug][gsap:onReady]", { readyFired: readyFired.current })
     if (readyFired.current) cb()
     else readyCbs.current.push(cb)
   },[])
@@ -122,14 +159,43 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
     // entrance already played). Parking a tween in a finished, paused timeline
     // would freeze it at its from-state, so once the entrance is done let the
     // (live) tween play on its own instead.
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:addAnimation]", {
+        position,
+        readyFired: readyFired.current,
+        durationBefore: tl.current?.duration(),
+      })
+    }
     if (readyFired.current) return
     tl.current?.add(animation, position);
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:addAnimation:done]", {
+        position,
+        durationAfter: tl.current?.duration(),
+        children: tl.current?.getChildren(false, true, true).length,
+      })
+    }
   },[])
   const schedule = useCallback((fn: () => void, position: gsap.Position) => {
     // Same late-arrival case: a callback added past the playhead never fires, so
     // run the reveal immediately once the entrance has finished.
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:schedule]", {
+        position,
+        readyFired: readyFired.current,
+        durationBefore: tl.current?.duration(),
+        childrenBefore: tl.current?.getChildren(false, true, true).length,
+      })
+    }
     if (readyFired.current) { fn(); return }
     tl.current?.add(fn, position)
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:schedule:done]", {
+        position,
+        durationAfter: tl.current?.duration(),
+        childrenAfter: tl.current?.getChildren(false, true, true).length,
+      })
+    }
   },[])
 
   // Throttle ScrollTrigger.refresh() to once per frame so the ResizeObserver
@@ -148,6 +214,12 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
   const resizeObserver = useRef<ResizeObserver | null>(null)
 
   const resetTimeline = useCallback(() => {
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:reset]", {
+        duration: tl.current?.duration(),
+        progress: tl.current?.progress(),
+      })
+    }
     tl.current?.kill()
     tl.current?.revert()
     ScrollTrigger.getAll().forEach(st => st.kill())
@@ -161,7 +233,19 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
 
   const resumeTimeline = useCallback(() => {
     const t = tl.current
-    if (!t) return
+    if (!t) {
+      if (GSAP_DEBUG) console.log("[cv-debug][gsap:resume:skip-no-timeline]")
+      return
+    }
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:resume:start]", {
+        duration: t.duration(),
+        progress: t.progress(),
+        paused: t.paused(),
+        readyFired: readyFired.current,
+        children: t.getChildren(false, true, true).length,
+      })
+    }
     // When the orchestrated entrance finishes, hand off to scroll control and
     // realign triggers against the now-settled layout.
     t.eventCallback("onComplete", () => { fireReady(); ScrollTrigger.refresh() })
@@ -185,6 +269,13 @@ export default function GsapProvider({ children }: { children: ReactNode }) {
     }
 
     t.resume()
+    if (GSAP_DEBUG) {
+      console.log("[cv-debug][gsap:resume:after]", {
+        duration: t.duration(),
+        progress: t.progress(),
+        paused: t.paused(),
+      })
+    }
   },[getScroller, fireReady, scheduleRefresh])
 
   // Fonts/markdown/images loading also change content height after the triggers

src/app/_trpc/ServerClient.ts

@@ -1,22 +1,3 @@
-import { httpBatchLink } from "@trpc/client";
 import { trpcRouter } from "~/server/routers/_app";
 
-function getBaseUrl() {
+export const servTrpc = trpcRouter.createCaller({});
-  if (typeof window !== 'undefined')
-    // browser should use relative path
-    return '';
-  if (process.env.VERCEL_URL)
-    // reference for vercel.com
-    return `https://${process.env.VERCEL_URL}`;
-  if (process.env.RENDER_INTERNAL_HOSTNAME)
-    // reference for render.com
-    return `http://${process.env.RENDER_INTERNAL_HOSTNAME}:${process.env.PORT}`;
-  // assume localhost
-  return `http://localhost:${process.env.PORT ?? 3000}`;
-};
-
-export const servTrpc = trpcRouter.createCaller({
-  links: [
-    httpBatchLink({url: `${getBaseUrl()}/api/trpc`}),
-  ],
-});

src/app/_trpc/TrpcProvider.tsx

@@ -3,6 +3,7 @@ import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { ReactQueryStreamedHydration } from '@tanstack/react-query-next-experimental'
 import { httpBatchLink } from "@trpc/client";
 import React, { useState } from "react"
+import superjson from "superjson";
 import { trpc } from "./Client";
 import getBaseUrl from "~/app/_trpc/GetBaseUrl";
 let clientQueryClient: QueryClient | undefined = undefined;
@@ -33,6 +34,7 @@ export default function TrpcProvider({ children }: { children: React.ReactNode }
       links: [
         httpBatchLink({
           url: `${baseUrl}/api/trpc`,
+          transformer: superjson,
         }),
       ],
     })

src/app/admin/blog/_components/BlogMdxEditorPreview.tsx

@@ -4,7 +4,7 @@ import { useEffect, useState } from 'react'
 import { MDXRemote } from 'next-mdx-remote'
 import { serialize } from 'next-mdx-remote/serialize'
 import type { MDXRemoteSerializeResult } from 'next-mdx-remote'
-import { mdxComponents } from '~/app/blog/_components/mdx-components'
+import { mdxComponents } from '~/components/mdx-components'
 
 export default function BlogMdxEditorPreview(params: { source: string }) {
   const [compiled, setCompiled] = useState<MDXRemoteSerializeResult | null>(null)

src/app/admin/chat/_components/ModelSelector.tsx

@@ -0,0 +1,48 @@
+'use client'
+import { trpc } from '~/app/_trpc/Client'
+import {
+	Select,
+	SelectContent,
+	SelectItem,
+	SelectTrigger,
+	SelectValue,
+} from '~/components/ui/select'
+
+export default function ModelSelector({ initialValue }: { initialValue: string }) {
+	const utils = trpc.useUtils()
+	const { data: models, isLoading, error } = trpc.chat.listModels.useQuery()
+	const { data: model = initialValue } = trpc.chat.getModel.useQuery(undefined, {
+		initialData: initialValue,
+	})
+
+	const mutation = trpc.chat.updateModel.useMutation({
+		onSuccess: () => utils.chat.getModel.invalidate(),
+	})
+
+	// Ensure the currently-saved model is always selectable, even if the
+	// OpenAI list doesn't include it (e.g. a deprecated model).
+	const options = Array.from(new Set([model, ...(models ?? [])])).filter(Boolean)
+
+	return (
+		<div className="flex flex-col gap-2">
+			<Select value={model} onValueChange={(v) => mutation.mutate({ model: v })}>
+				<SelectTrigger className="w-72">
+					<SelectValue placeholder={isLoading ? 'Loading models…' : 'Select a model'} />
+				</SelectTrigger>
+				<SelectContent>
+					{options.map((id) => (
+						<SelectItem key={id} value={id}>
+							{id}
+						</SelectItem>
+					))}
+				</SelectContent>
+			</Select>
+			<div className="flex items-center gap-3 text-sm text-muted-foreground">
+				{mutation.isPending && <span>Saving…</span>}
+				{mutation.isSuccess && !mutation.isPending && <span>Saved</span>}
+				{error && <span className="text-destructive">Failed to load models: {error.message}</span>}
+				{mutation.error && <span className="text-destructive">{mutation.error.message}</span>}
+			</div>
+		</div>
+	)
+}

src/app/admin/chat/page.tsx

@@ -1,18 +1,31 @@
 import { servTrpc } from '~/app/_trpc/ServerClient'
 import SystemPromptForm from './_components/SystemPromptForm'
+import ModelSelector from './_components/ModelSelector'
 
 export default async function SystemPromptPage() {
 	const prompt = await servTrpc.chat.getSystemPrompt()
+	const model = await servTrpc.chat.getModel()
 
 	return (
-		<div className="w-full max-w-2xl p-6 flex flex-col gap-4">
+		<div className="w-full max-w-2xl p-6 flex flex-col gap-8">
-			<div>
+			<div className="flex flex-col gap-4">
-				<h1 className="text-lg font-semibold">AI System Prompt</h1>
+				<div>
-				<p className="text-sm text-muted-foreground">
+					<h1 className="text-lg font-semibold">AI Model</h1>
-					This prompt is sent to the model on every chat request.
+					<p className="text-sm text-muted-foreground">
-				</p>
+						The OpenAI model used to respond to chat requests.
+					</p>
+				</div>
+				<ModelSelector initialValue={model} />
+			</div>
+			<div className="flex flex-col gap-4">
+				<div>
+					<h1 className="text-lg font-semibold">AI System Prompt</h1>
+					<p className="text-sm text-muted-foreground">
+						This prompt is sent to the model on every chat request.
+					</p>
+				</div>
+				<SystemPromptForm initialValue={prompt} />
 			</div>
-			<SystemPromptForm initialValue={prompt} />
 		</div>
 	)
 }

src/app/api/chat/route.ts

@@ -32,6 +32,7 @@ export async function POST(req: Request) {
 	if (!session) return new Response('Session not found', { status: 404 })
 
 	const systemPrompt = await servTrpc.chat.getSystemPrompt() || 'You are an AI recruiter assistant.'
+	const model = await servTrpc.chat.getModel()
 
 	// Save the latest user message
 	const lastMessage = messages[messages.length - 1]
@@ -46,7 +47,7 @@ export async function POST(req: Request) {
 	}
 
 	const result = streamText({
-		model: openai('gpt-5-mini'),
+		model: openai(model),
 		system: systemPrompt,
 		messages: await convertToModelMessages(messages),
 		tools: {

src/app/blog/[slug]/page.tsx

@@ -1,9 +1,10 @@
 import { notFound } from "next/navigation";
 import { MDXRemote } from "next-mdx-remote/rsc";
 import { TRPCError } from "@trpc/server";
+import matter from "gray-matter";
 import { servTrpc } from "~/app/_trpc/ServerClient";
 import { Badge } from "~/components/ui/badge";
-import { mdxComponents } from "../_components/mdx-components";
+import { mdxComponents } from "~/components/mdx-components";
 
 type Props = {
   params: Promise<{ slug: string }>;
@@ -12,37 +13,47 @@ type Props = {
 export default async function BlogPostPage({ params }: Props) {
   const { slug } = await params;
 
-  let post: Awaited<ReturnType<typeof servTrpc.blog.bySlug>>;
+  let post: Awaited<ReturnType<typeof servTrpc.blog.metadataBySlug>>;
   try {
-    post = await servTrpc.blog.bySlug(slug);
+    post = await servTrpc.blog.metadataBySlug(slug);
   } catch (e) {
     if (e instanceof TRPCError && e.code === "NOT_FOUND") notFound();
     throw e;
   }
 
+  const response = await fetch(post.fileUrl, { next: { revalidate: 3600 } });
+  if (!response.ok) notFound();
+
+  const parsed = matter(await response.text());
+  const tags = Array.isArray(parsed.data.tags)
+    ? parsed.data.tags.map((tag) => String(tag).trim()).filter(Boolean)
+    : post.tags;
+  const title = typeof parsed.data.title === "string" ? parsed.data.title : post.title;
+  const date = typeof parsed.data.date === "string" ? parsed.data.date : post.date;
+
   return (
     <main className="mx-auto max-w-2xl px-4 py-12">
       <header className="mb-8">
-        <h1 className="text-3xl font-bold">{post.title}</h1>
+        <h1 className="text-3xl font-bold">{title}</h1>
-        {post.date && (
+        {date && (
           <time className="text-muted-foreground text-sm">
-            {new Date(post.date).toLocaleDateString("en-US", {
+            {new Date(date).toLocaleDateString("en-US", {
               year: "numeric",
               month: "long",
               day: "numeric",
             })}
           </time>
         )}
-        {post.tags.length > 0 && (
+        {tags.length > 0 && (
           <div className="mt-3 flex flex-wrap gap-1.5">
-            {post.tags.map((tag) => (
+            {tags.map((tag) => (
               <Badge key={tag} variant="outline">{tag}</Badge>
             ))}
           </div>
         )}
       </header>
       <article className="prose dark:prose-invert max-w-none">
-        <MDXRemote source={post.content} components={mdxComponents} />
+        <MDXRemote source={parsed.content} components={mdxComponents} />
       </article>
     </main>
   );

src/app/chat/_components/AssistantMessage.tsx

@@ -1,6 +1,5 @@
 import type { UIMessage } from "ai";
-import Markdown from "react-markdown";
+import { ClientMdx } from "~/components/ClientMdx";
-import { cn } from "~/lib/utils";
 
 export const AssistantMessage = (props: { message: UIMessage }) => {
   let message = props.message;
@@ -16,9 +15,7 @@ export const AssistantMessage = (props: { message: UIMessage }) => {
         {message.parts.map((part, i) => {
           if (part.type === 'text') {
             return (
-              <Markdown key={crypto.randomUUID()}>
+              <ClientMdx key={i} source={part.text} fallback={part.text} />
-                {part.text}
-              </Markdown>
             )
           }
           if (part.type === 'tool-scheduleMeeting') {

src/app/cv/_components/CvCategory.tsx

@@ -1,4 +1,4 @@
-'use client'
+import type { ReactNode } from "react"
 import CvEntry from "./CvEntry"
 import type { RouterOutputs } from "~/server/routers/_app"
 import { cn } from "~/lib/utils"
@@ -14,13 +14,14 @@ type CvCategoryProps = {
   category: CvCategoryData,
   layout: "row" | "col",
   position?: number,
+  descriptions: Record<string, ReactNode>,
 }
-export default function CvCategory({ category, layout, position = 0 }: CvCategoryProps) {
+export default function CvCategory({ category, layout, position = 0, descriptions }: CvCategoryProps) {
   const entries = category.cvEntry
   return (
     <AnimatedCard position={position} className={cn(layout == "row" ? "w-full" : "", "h-screen")}>
       <CardHeader>
-        <AnimateTextIn position={position + 0.2} animation="slide">
+        <AnimateTextIn once position={position + 0.2} animation="slide" debugId={`cv-category-title:${category.name}:${position + 0.2}`}>
           <CardTitle>{category.name}</CardTitle>
         </AnimateTextIn>
       </CardHeader>
@@ -28,8 +29,8 @@ export default function CvCategory({ category, layout, position = 0 }: CvCategor
         <CardContent className={cn(layout == "row" ? "flex flex-row flex-wrap justify-center lg:justify-between" : "flex flex-col", "gap-4", "overflow-scroll")}>
           <ScrollArea>
             {entries.map((entry, i) => (
-              <AnimatePopUp position={position + 0.4 + i * 0.2} key={entry.id}>
+              <AnimatePopUp position={position + 0.4 + i * 0.2} debugId={`cv-entry-wrapper:${category.name}:${entry.title}:${position + 0.4 + i * 0.2}`} key={entry.id}>
-                <CvEntry position={position + 0.4 + i * 0.2} entry={entry} className={layout == "row" ? "w-full lg:w-fit" : undefined} />
+                <CvEntry position={position + 0.4 + i * 0.2} entry={entry} description={descriptions[entry.id]} className={layout == "row" ? "w-full lg:w-fit" : undefined} />
               </AnimatePopUp>
             ))}
           </ScrollArea>

src/app/cv/_components/CvEntry.tsx

@@ -1,18 +1,17 @@
+import type { ReactNode } from "react"
 import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "~/components/ui/card"
 import { cn } from "~/lib/utils"
-import Markdown from 'react-markdown'
 import { format } from 'date-fns'
-import rehypeHighlight from 'rehype-highlight'
-import rehypeRaw from 'rehype-raw'
 import type { ArrayElement } from "type-fest"
 import AnimateTextIn from "~/app/_components/Animated/AnimateIn"
-import AnimatePopUp from "~/app/_components/Animated/AnimatePopUp"
+import AnimatedDiv from "~/app/_components/Animated/AnimatedDiv"
 import type { CvCategoryData } from "./CvCategory"
 
 export type CvEntryData = ArrayElement<CvCategoryData['cvEntry']>
 
-export default function CvEntry({ entry, className, position = 0 }: {
+export default function CvEntry({ entry, description, className, position = 0 }: {
 	entry: CvEntryData,
+	description?: ReactNode,
 	className?: string,
 	position?: number
 }) {
@@ -20,7 +19,7 @@ export default function CvEntry({ entry, className, position = 0 }: {
 		<Card className={className ? cn("w-fit", className) : "w-fit"}>
 			{entry.title ?
 				<CardHeader>
-					<AnimateTextIn position={position} animation="slide">
+					<AnimateTextIn position={position} animation="slide" debugId={`cv-entry-title:${entry.title}:${position}`}>
 						<CardTitle> {entry.title} </CardTitle>
 					</AnimateTextIn>
 				</CardHeader> :
@@ -28,17 +27,21 @@ export default function CvEntry({ entry, className, position = 0 }: {
 			}
 			{entry.description ?
 				<CardContent className="text-sm lg:text-base">
-					<AnimatePopUp position={position + 0.2}>
+					{/* Fade the description in place instead of collapsing its height:
+					    the outer entry pop-up (CvCategory) measures height:auto when it
+					    plays, so the description must stay laid out at full height or the
+					    entry reveals too short. */}
+					<AnimatedDiv once position={position + 0.2} className="opacity-0" opacity={1} duration={0.5} debugId={`cv-entry-description:${entry.title}:${position + 0.2}`}>
 						<article className="prose prose-zinc dark:prose-invert max-w-none">
-							<Markdown rehypePlugins={[rehypeHighlight, rehypeRaw]}>{entry.description}</Markdown>
+							{description ?? entry.description}
 						</article>
-					</AnimatePopUp>
+					</AnimatedDiv>
 				</CardContent> :
 				<></>
 			}
 			{!entry.hideDates ?
 				<CardFooter className="text-sm">
-					<AnimateTextIn position={position + 0.4}>
+					<AnimateTextIn position={position + 0.4} debugId={`cv-entry-dates:${entry.title}:${position + 0.4}`}>
 						{`von ${format(new Date(entry.fromTime), 'M. yyyy')} bis zum ${format(new Date(entry.toTime), 'M. yyyy')}`}
 					</AnimateTextIn>
 				</CardFooter> :

src/app/cv/_components/Page.tsx

@@ -0,0 +1,59 @@
+'use client'
+import type { ReactNode } from "react";
+import { Sidebar, SidebarContent, SidebarProvider } from "~/components/ui/sidebar";
+import type { RouterOutputs } from "~/server/routers/_app"
+import SidebarTriggerDisappearsOnMobile from "./SidebarTriggerDisappearsOnMobile";
+import CvCategory from "./CvCategory";
+import { useTimeLine } from "~/app/_providers/GsapProvicer";
+export default function CvPage(props: {
+  cv: RouterOutputs['categoryv2']['listAllWithEntries'],
+  descriptions: Record<string, ReactNode>,
+}) {
+  useTimeLine(props.cv)
+  const { descriptions } = props
+  const byPosition = (pos: "sidebar" | "header" | "col1" | "col2") =>
+    props.cv?.filter((c) => c.layoutPosition === pos) ?? []
+  const sidebarCategories = byPosition("sidebar")
+  const headerCategories = byPosition("header")
+  const col1Categories = byPosition("col1")
+  const col2Categories = byPosition("col2")
+  return (
+    <>
+      <SidebarProvider>
+        {sidebarCategories.length > 0 &&
+          <>
+            <SidebarTriggerDisappearsOnMobile />
+            <Sidebar>
+              <SidebarContent className="p-2 lg:pt-[3.2rem]">
+                {sidebarCategories.map((cat, i) => (
+                  <CvCategory layout="col" position={i} category={cat} descriptions={descriptions} key={cat.id} />
+                ))}
+              </SidebarContent>
+            </Sidebar>
+          </>
+        }
+        <div className="h-full w-full flex flex-wrap flex-row p-4 pt-8 ">
+          <div id="mainwrap" className="flex w-full flex-col gap-4 lg:px-[15vw]">
+            <div id="header" className="flex  w-full h-fit flex-row gap-4 flex-wrap">
+              {headerCategories.map((cat, i) => (
+                <CvCategory layout="row" position={i} category={cat} descriptions={descriptions} key={cat.id} />
+              ))}
+            </div>
+            <div id="colwrapper" className="flex flex-col lg:flex-row w-full h-3/4 gap-4">
+              <div id="col1" className={`flex flex-col w-full ${col1Categories.length > 0 ? "lg:w-1/2" : ""} h-full gap-4`}>
+                {col1Categories.map((cat, i) => (
+                  <CvCategory layout="col" position={i} category={cat} descriptions={descriptions} key={cat.id} />
+                ))}
+              </div>
+              <div id="col2" className={`flex flex-col w-full ${col2Categories.length > 0 ? "lg:w-1/2" : ""} h-full gap-4`}>
+                {col2Categories.map((cat, i) => (
+                  <CvCategory layout="col" position={i} category={cat} descriptions={descriptions} key={cat.id} />
+                ))}
+              </div>
+            </div>
+          </div>
+        </div>
+      </SidebarProvider>
+    </>
+  )
+}

src/app/cv/page.tsx

@@ -1,55 +1,42 @@
-'use client'
+import { Suspense, type ReactNode } from "react";
-import { useTimeLine } from "../_providers/GsapProvicer";
+import { MDXRemote } from "next-mdx-remote/rsc";
-import { trpc } from "../_trpc/Client";
+import rehypeHighlight from "rehype-highlight";
-import { SidebarContent, SidebarProvider, Sidebar } from "~/components/ui/sidebar";
+import remarkGfm from "remark-gfm";
-import SidebarTriggerDisappearsOnMobile from "./_components/SidebarTriggerDisappearsOnMobile";
+import { servTrpc as trpc } from "../_trpc/ServerClient";
-import CvCategory from "./_components/CvCategory";
+import { mdxComponents } from "~/components/mdx-components";
-export default function CvPage() {
+import Page from "./_components/Page";
-  const cv = trpc.categoryv2.listAllWithEntries.useQuery();
+
-  useTimeLine(cv.data)
+export default async function CvPage() {
-  const byPosition = (pos: "sidebar" | "header" | "col1" | "col2") =>
+  const cv = await trpc.categoryv2.listAllWithEntries();
-    cv.data?.filter((c) => c.layoutPosition === pos) ?? []
+
-  const sidebarCategories = byPosition("sidebar")
+  // Render the MDX descriptions on the server so they exist at first paint.
-  const headerCategories = byPosition("header")
+  // The client tree (which runs the GSAP entrance via useTimeLine) only places
-  const col1Categories = byPosition("col1")
+  // these already-rendered nodes — it never invokes the MDX renderer itself, so
-  const col2Categories = byPosition("col2")
+  // the 'use client' boundary stays intact and the animations no longer play
+  // against an un-rendered fallback.
+  const descriptions: Record<string, ReactNode> = {};
+  for (const category of cv ?? []) {
+    for (const entry of category.cvEntry) {
+      if (!entry.description?.trim()) continue;
+      descriptions[entry.id] = (
+        <MDXRemote
+          source={entry.description}
+          components={mdxComponents}
+          options={{
+            mdxOptions: {
+              format: "md",
+              remarkPlugins: [remarkGfm],
+              rehypePlugins: [rehypeHighlight],
+            },
+          }}
+        />
+      );
+    }
+  }
+
   return (
-    <>
+    <Suspense>
-      <SidebarProvider>
+      <Page cv={cv} descriptions={descriptions} />
-        {sidebarCategories.length > 0 &&
+    </Suspense>
-          <>
-            <SidebarTriggerDisappearsOnMobile />
-            <Sidebar>
-              <SidebarContent className="p-2 lg:pt-[3.2rem]">
-                {sidebarCategories.map((cat, i) => (
-                  <CvCategory layout="col" position={i} category={cat} key={cat.id} />
-                ))}
-              </SidebarContent>
-            </Sidebar>
-          </>
-        }
-        <div className="h-full w-full flex flex-wrap flex-row p-4 pt-8 ">
-          <div id="mainwrap" className="flex w-full flex-col gap-4 lg:px-[15vw]">
-            <div id="header" className="flex  w-full h-fit flex-row gap-4 flex-wrap">
-              {headerCategories.map((cat, i) => (
-                <CvCategory layout="row" position={i} category={cat} key={cat.id} />
-              ))}
-            </div>
-            <div id="colwrapper" className="flex flex-col lg:flex-row w-full h-3/4 gap-4">
-              <div id="col1" className={`flex flex-col w-full ${col1Categories.length > 0 ? "lg:w-1/2" : ""} h-full gap-4`}>
-                {col1Categories.map((cat, i) => (
-                  <CvCategory layout="col" position={i} category={cat} key={cat.id} />
-                ))}
-              </div>
-              <div id="col2" className={`flex flex-col w-full ${col2Categories.length > 0 ? "lg:w-1/2" : ""} h-full gap-4`}>
-                {col2Categories.map((cat, i) => (
-                  <CvCategory layout="col" position={i} category={cat} key={cat.id} />
-                ))}
-              </div>
-            </div>
-          </div>
-        </div>
-      </SidebarProvider>
-    </>
   )
 }

src/app/layout.tsx

@@ -12,6 +12,7 @@ import TrpcProvider from "./_trpc/TrpcProvider";
 import ThemeProvider from './_providers/ThemeProvider'
 import GsapProvider from "./_providers/GsapProvicer";
 import {MessagesProvider} from "./_providers/MessagesProvider";
+import { MusicPlayerProvider } from "./music/_components/MusicPlayerProvider";
 import { CodeHighlightStyle } from "./_components/CodeHighlightSyle";
 import { cn } from "~/lib/utils";
 import AnimatedBackGroundContainer from "./_components/Animated/AnimatedBackGroundContainer";
@@ -49,6 +50,7 @@ export default async function RootLayout({
 						<body className="flex flex-col bg-background text-foreground">
 							<ThemeProvider>
 							<MessagesProvider>
+								<MusicPlayerProvider>
 								<AnimatedBackGroundContainer followSpeed={0.003} particleCount={100} orbitRadius={2000}>
 									<TopNav />
 									<main className="absolute lg:top-10 h-screen lg:h-[calc(100vh-var(--spacing)*10)] w-screen">
@@ -57,6 +59,7 @@ export default async function RootLayout({
 									{modal}
 								</AnimatedBackGroundContainer>
 								<ChatFAB />
+								</MusicPlayerProvider>
 								</MessagesProvider>
 							</ThemeProvider>
 						</body>

src/app/music/_components/AudioPlayer.tsx

@@ -6,6 +6,7 @@ import type WaveSurfer from "wavesurfer.js";
 import { Download, Loader2, Pause, Play } from "lucide-react";
 import { Button } from "~/components/ui/button";
 import { toast } from "sonner";
+import { useMusicPlayer } from "./MusicPlayerProvider";
 
 function formatTime(seconds: number) {
 	if (!Number.isFinite(seconds)) return "0:00";
@@ -28,32 +29,46 @@ function waveColors() {
 	};
 }
 
+/**
+ * Per-track waveform. Playback itself is owned by the shared MusicPlayer engine
+ * (so it keeps running across navigation); this wavesurfer instance is only a
+ * visual + seek surface that mirrors the engine when its track is active.
+ */
 export default function AudioPlayer(props: {
-	/** Streaming-friendly source the player actually plays. */
+	id: string;
 	src: string;
-	/** Original high-quality file offered via the download button. */
 	downloadUrl: string;
 	downloadName: string;
 }) {
 	const containerRef = useRef<HTMLDivElement>(null);
 	const wsRef = useRef<WaveSurfer | null>(null);
-	const [playing, setPlaying] = useState(false);
-	const [current, setCurrent] = useState(0);
-	const [duration, setDuration] = useState(0);
 	const [ready, setReady] = useState(false);
+	const [duration, setDuration] = useState(0);
 	const [downloading, setDownloading] = useState(false);
 	const { resolvedTheme } = useTheme();
 
+	const { currentId, isPlaying, currentTime, toggle, seek, subscribeTime } = useMusicPlayer();
+	const isActive = currentId === props.id;
+
+	// Reach live values from the once-created wavesurfer callbacks.
+	const isActiveRef = useRef(isActive);
+	isActiveRef.current = isActive;
+	const currentTimeRef = useRef(currentTime);
+	currentTimeRef.current = currentTime;
+	const toggleRef = useRef(toggle);
+	toggleRef.current = toggle;
+	const seekRef = useRef(seek);
+	seekRef.current = seek;
+
 	useEffect(() => {
 		let ws: WaveSurfer | null = null;
 		let cancelled = false;
 		setReady(false);
-		setCurrent(0);
 
 		(async () => {
 			const WaveSurferClass = (await import("wavesurfer.js")).default;
 			if (cancelled || !containerRef.current) return;
-			ws = WaveSurferClass.create({
+			const instance = WaveSurferClass.create({
 				container: containerRef.current,
 				url: props.src,
 				height: 44,
@@ -64,15 +79,20 @@ export default function AudioPlayer(props: {
 				cursorWidth: 1,
 				...waveColors(),
 			});
-			wsRef.current = ws;
+			ws = instance;
-			ws.on("ready", () => {
+			wsRef.current = instance;
+			instance.on("ready", () => {
+				// This media is for drawing only — never let it make sound.
+				instance.setMuted(true);
 				setReady(true);
-				setDuration(ws?.getDuration() ?? 0);
+				setDuration(instance.getDuration());
+				if (isActiveRef.current) instance.setTime(currentTimeRef.current);
+			});
+			// Clicking the waveform: start this track if it isn't playing, then seek.
+			instance.on("interaction", (time: number) => {
+				if (!isActiveRef.current) toggleRef.current(props.id);
+				seekRef.current(time);
 			});
-			ws.on("play", () => setPlaying(true));
-			ws.on("pause", () => setPlaying(false));
-			ws.on("finish", () => setPlaying(false));
-			ws.on("timeupdate", (t) => setCurrent(t));
 		})();
 
 		return () => {
@@ -82,15 +102,23 @@ export default function AudioPlayer(props: {
 		};
 	}, [props.src]);
 
+	// Mirror the engine's playback position onto the cursor while active.
+	useEffect(() => {
+		const ws = wsRef.current;
+		if (!ws || !ready) return;
+		if (!isActive) {
+			ws.setTime(0);
+			return;
+		}
+		ws.setTime(currentTimeRef.current);
+		return subscribeTime((t) => wsRef.current?.setTime(t));
+	}, [isActive, ready, subscribeTime]);
+
 	// Re-tint the waveform when the user toggles light/dark.
 	useEffect(() => {
 		wsRef.current?.setOptions(waveColors());
 	}, [resolvedTheme]);
 
-	function togglePlay() {
-		wsRef.current?.playPause();
-	}
-
 	async function handleDownload() {
 		setDownloading(true);
 		try {
@@ -114,6 +142,8 @@ export default function AudioPlayer(props: {
 		}
 	}
 
+	const playing = isActive && isPlaying;
+
 	return (
 		<div className="flex items-center gap-3 rounded-lg border bg-transparent px-3 py-2">
 			<Button
@@ -122,13 +152,13 @@ export default function AudioPlayer(props: {
 				variant="ghost"
 				aria-label={playing ? "Pause" : "Play"}
 				disabled={!ready}
-				onClick={togglePlay}
+				onClick={() => toggle(props.id)}
 			>
 				{playing ? <Pause /> : <Play />}
 			</Button>
 
 			<span className="w-10 shrink-0 text-right font-mono text-xs text-muted-foreground tabular-nums">
-				{formatTime(current)}
+				{formatTime(isActive ? currentTime : 0)}
 			</span>
 
 			<div className="relative flex-1">

src/app/music/_components/MusicMiniPlayer.tsx

@@ -0,0 +1,73 @@
+'use client'
+
+import { useState } from "react";
+import { Music } from "lucide-react";
+import {
+	Drawer,
+	DrawerContent,
+	DrawerHeader,
+	DrawerTitle,
+	DrawerTrigger,
+} from "~/components/ui/drawer";
+import { Slider } from "~/components/ui/slider";
+import { useMusicPlayer } from "./MusicPlayerProvider";
+import PlayerControls from "./PlayerControls";
+
+function formatTime(seconds: number) {
+	if (!Number.isFinite(seconds)) return "0:00";
+	const m = Math.floor(seconds / 60);
+	const s = Math.floor(seconds % 60);
+	return `${m}:${s.toString().padStart(2, "0")}`;
+}
+
+/**
+ * Global, persistent mini-player: a floating button (shown once something is
+ * loaded) that opens a drawer with the transport controls and a scrubber, so
+ * playback can be controlled from any page while it keeps running in the
+ * background.
+ */
+export default function MusicMiniPlayer() {
+	const { currentTrack, isPlaying, currentTime, duration, seek } = useMusicPlayer();
+	const [open, setOpen] = useState(false);
+
+	if (!currentTrack) return null;
+
+	return (
+		<Drawer open={open} onOpenChange={setOpen}>
+			<DrawerTrigger asChild>
+				<button
+					type="button"
+					aria-label="Open player"
+					className="fixed bottom-4 left-4 z-40 flex max-w-[60vw] items-center gap-2 rounded-full border bg-background/80 px-4 py-2 shadow-lg backdrop-blur-md transition-colors hover:bg-background"
+				>
+					<Music className={isPlaying ? "animate-pulse" : ""} />
+					<span className="truncate text-sm">{currentTrack.title}</span>
+				</button>
+			</DrawerTrigger>
+			<DrawerContent>
+				<DrawerHeader>
+					<DrawerTitle>{currentTrack.title}</DrawerTitle>
+				</DrawerHeader>
+				<div className="mx-auto flex w-full max-w-md flex-col gap-4 px-4 pb-8">
+					<div className="flex items-center gap-2">
+						<span className="w-10 text-right font-mono text-xs text-muted-foreground tabular-nums">
+							{formatTime(currentTime)}
+						</span>
+						<Slider
+							className="flex-1"
+							min={0}
+							max={duration || 1}
+							step={0.1}
+							value={[currentTime]}
+							onValueChange={([v]) => seek(v ?? 0)}
+						/>
+						<span className="w-10 font-mono text-xs text-muted-foreground tabular-nums">
+							{formatTime(duration)}
+						</span>
+					</div>
+					<PlayerControls />
+				</div>
+			</DrawerContent>
+		</Drawer>
+	);
+}

src/app/music/_components/MusicPlayerProvider.tsx

@@ -0,0 +1,314 @@
+'use client'
+
+import {
+	createContext,
+	useCallback,
+	useContext,
+	useEffect,
+	useMemo,
+	useRef,
+	useState,
+	type ReactNode,
+} from "react";
+import { trpc } from "~/app/_trpc/Client";
+import MusicMiniPlayer from "./MusicMiniPlayer";
+
+export type PlayerTrack = {
+	id: string;
+	title: string;
+	/** Streaming-friendly source actually played. */
+	src: string;
+	/** Original high-quality file for the download button. */
+	downloadUrl: string;
+	downloadName: string;
+};
+
+type MusicPlayerValue = {
+	tracks: PlayerTrack[];
+	currentId: string | null;
+	currentTrack: PlayerTrack | null;
+	isPlaying: boolean;
+	shuffle: boolean;
+	currentTime: number;
+	duration: number;
+	/** Play button on a track: start it, or toggle play/pause if already current. */
+	toggle: (id: string) => void;
+	/** Global play/pause — acts on the current track (or starts the first one). */
+	togglePlayCurrent: () => void;
+	next: () => void;
+	previous: () => void;
+	toggleShuffle: () => void;
+	seek: (seconds: number) => void;
+	/** Subscribe to playback time updates (for waveform cursors). */
+	subscribeTime: (cb: (time: number) => void) => () => void;
+};
+
+const MusicPlayerContext = createContext<MusicPlayerValue | null>(null);
+
+export function useMusicPlayer() {
+	const ctx = useContext(MusicPlayerContext);
+	if (!ctx) throw new Error("useMusicPlayer must be used within a MusicPlayerProvider");
+	return ctx;
+}
+
+export function MusicPlayerProvider({ children }: { children: ReactNode }) {
+	// The provider owns the playlist so playback survives navigating away from
+	// the music page. The query is cached, so the music page shares this request.
+	const { data } = trpc.music.list.useQuery();
+	const tracks = useMemo<PlayerTrack[]>(
+		() =>
+			(data ?? []).map((t) => ({
+				id: t.id,
+				title: t.title,
+				src: t.streamUrl ?? t.fileUrl,
+				downloadUrl: t.fileUrl,
+				downloadName: t.fileName,
+			})),
+		[data],
+	);
+
+	const [currentId, setCurrentId] = useState<string | null>(null);
+	const [isPlaying, setIsPlaying] = useState(false);
+	const [shuffle, setShuffle] = useState(false);
+	const [currentTime, setCurrentTime] = useState(0);
+	const [duration, setDuration] = useState(0);
+
+	const audioRef = useRef<HTMLAudioElement | null>(null);
+	const tracksRef = useRef(tracks);
+	tracksRef.current = tracks;
+
+	// Lightweight pub/sub so each waveform can follow playback time without every
+	// player re-rendering on the audio element's frequent timeupdate.
+	const timeSubs = useRef<Set<(t: number) => void>>(new Set());
+	const subscribeTime = useCallback((cb: (t: number) => void) => {
+		timeSubs.current.add(cb);
+		return () => {
+			timeSubs.current.delete(cb);
+		};
+	}, []);
+	const emitTime = useCallback((t: number) => {
+		timeSubs.current.forEach((cb) => cb(t));
+	}, []);
+
+	const currentTrack = useMemo(
+		() => tracks.find((t) => t.id === currentId) ?? null,
+		[tracks, currentId],
+	);
+
+	const toggle = useCallback((id: string) => {
+		setCurrentId((prev) => {
+			if (prev === id) {
+				setIsPlaying((p) => !p);
+				return prev;
+			}
+			setIsPlaying(true);
+			return id;
+		});
+	}, []);
+
+	const togglePlayCurrent = useCallback(() => {
+		setCurrentId((prev) => {
+			if (prev) {
+				setIsPlaying((p) => !p);
+				return prev;
+			}
+			const first = tracksRef.current[0]?.id ?? null;
+			if (first) setIsPlaying(true);
+			return first;
+		});
+	}, []);
+
+	const step = useCallback((dir: 1 | -1) => {
+		const ids = tracksRef.current.map((t) => t.id);
+		if (ids.length === 0) return;
+		setCurrentId((prev) => {
+			let nextId: string;
+			if (shuffle && dir === 1 && ids.length > 1) {
+				do {
+					nextId = ids[Math.floor(Math.random() * ids.length)]!;
+				} while (nextId === prev);
+			} else {
+				const idx = prev ? ids.indexOf(prev) : -1;
+				nextId = ids[(idx + dir + ids.length) % ids.length]!;
+			}
+			setIsPlaying(true);
+			return nextId;
+		});
+	}, [shuffle]);
+	const next = useCallback(() => step(1), [step]);
+	const previous = useCallback(() => step(-1), [step]);
+	const toggleShuffle = useCallback(() => setShuffle((s) => !s), []);
+
+	const stepRef = useRef(step);
+	stepRef.current = step;
+
+	const seek = useCallback(
+		(s: number) => {
+			if (audioRef.current) audioRef.current.currentTime = s;
+			setCurrentTime(s);
+			emitTime(s);
+		},
+		[emitTime],
+	);
+
+	// Persistent audio element + listeners, created once on the client.
+	useEffect(() => {
+		const audio = new Audio();
+		audio.preload = "metadata";
+		audioRef.current = audio;
+		const onTime = () => {
+			setCurrentTime(audio.currentTime);
+			emitTime(audio.currentTime);
+		};
+		const onMeta = () => setDuration(audio.duration || 0);
+		const onEnded = () => stepRef.current(1);
+		audio.addEventListener("timeupdate", onTime);
+		audio.addEventListener("loadedmetadata", onMeta);
+		audio.addEventListener("ended", onEnded);
+		return () => {
+			audio.pause();
+			audio.removeEventListener("timeupdate", onTime);
+			audio.removeEventListener("loadedmetadata", onMeta);
+			audio.removeEventListener("ended", onEnded);
+			audioRef.current = null;
+		};
+	}, [emitTime]);
+
+	// Swap the source when the current track changes.
+	useEffect(() => {
+		const audio = audioRef.current;
+		if (!audio) return;
+		if (!currentTrack) {
+			audio.removeAttribute("src");
+			audio.load();
+			return;
+		}
+		if (audio.src !== currentTrack.src) {
+			audio.src = currentTrack.src;
+			audio.load();
+			setCurrentTime(0);
+			setDuration(0);
+		}
+	}, [currentTrack]);
+
+	// Reflect the desired play state onto the element.
+	useEffect(() => {
+		const audio = audioRef.current;
+		if (!audio || !currentTrack) return;
+		if (isPlaying) audio.play().catch(() => {});
+		else audio.pause();
+	}, [isPlaying, currentTrack]);
+
+	// OS-level media controls (lock screen, notification shade, media keys, etc.)
+	// via the Media Session API. Wire the transport actions to our state.
+	useEffect(() => {
+		if (typeof navigator === "undefined" || !("mediaSession" in navigator)) return;
+		const ms = navigator.mediaSession;
+		const handlers: [MediaSessionAction, MediaSessionActionHandler][] = [
+			["play", () => setIsPlaying(true)],
+			["pause", () => setIsPlaying(false)],
+			["previoustrack", () => stepRef.current(-1)],
+			["nexttrack", () => stepRef.current(1)],
+			[
+				"seekto",
+				(details) => {
+					if (typeof details.seekTime === "number") seek(details.seekTime);
+				},
+			],
+			[
+				"seekbackward",
+				(details) => seek((audioRef.current?.currentTime ?? 0) - (details.seekOffset ?? 10)),
+			],
+			[
+				"seekforward",
+				(details) => seek((audioRef.current?.currentTime ?? 0) + (details.seekOffset ?? 10)),
+			],
+		];
+		for (const [action, handler] of handlers) {
+			try {
+				ms.setActionHandler(action, handler);
+			} catch {
+				// Action unsupported by this browser — ignore.
+			}
+		}
+		return () => {
+			for (const [action] of handlers) {
+				try {
+					ms.setActionHandler(action, null);
+				} catch {
+					// ignore
+				}
+			}
+		};
+	}, [seek]);
+
+	// Keep the OS-visible metadata in sync with the current track.
+	useEffect(() => {
+		if (typeof navigator === "undefined" || !("mediaSession" in navigator)) return;
+		navigator.mediaSession.metadata = currentTrack
+			? new MediaMetadata({
+					title: currentTrack.title,
+					artist: "Gregor Lohaus",
+				})
+			: null;
+	}, [currentTrack]);
+
+	// Reflect play/pause state to the OS so the right button is shown.
+	useEffect(() => {
+		if (typeof navigator === "undefined" || !("mediaSession" in navigator)) return;
+		navigator.mediaSession.playbackState = currentTrack
+			? isPlaying
+				? "playing"
+				: "paused"
+			: "none";
+	}, [isPlaying, currentTrack]);
+
+	// Keep the scrubber position on the OS controls in sync.
+	useEffect(() => {
+		if (typeof navigator === "undefined" || !("mediaSession" in navigator)) return;
+		if (!("setPositionState" in navigator.mediaSession)) return;
+		try {
+			if (duration > 0 && Number.isFinite(duration)) {
+				navigator.mediaSession.setPositionState({
+					duration,
+					position: Math.min(currentTime, duration),
+					playbackRate: audioRef.current?.playbackRate ?? 1,
+				});
+			} else {
+				navigator.mediaSession.setPositionState();
+			}
+		} catch {
+			// Some browsers throw on invalid state — ignore.
+		}
+	}, [currentTime, duration]);
+
+	const value = useMemo<MusicPlayerValue>(
+		() => ({
+			tracks,
+			currentId,
+			currentTrack,
+			isPlaying,
+			shuffle,
+			currentTime,
+			duration,
+			toggle,
+			togglePlayCurrent,
+			next,
+			previous,
+			toggleShuffle,
+			seek,
+			subscribeTime,
+		}),
+		[
+			tracks, currentId, currentTrack, isPlaying, shuffle, currentTime, duration,
+			toggle, togglePlayCurrent, next, previous, toggleShuffle, seek, subscribeTime,
+		],
+	);
+
+	return (
+		<MusicPlayerContext.Provider value={value}>
+			{children}
+			<MusicMiniPlayer />
+		</MusicPlayerContext.Provider>
+	);
+}

src/app/music/_components/PlayerControls.tsx

@@ -0,0 +1,40 @@
+'use client'
+
+import { Pause, Play, Shuffle, SkipBack, SkipForward } from "lucide-react";
+import { Button } from "~/components/ui/button";
+import { useMusicPlayer } from "./MusicPlayerProvider";
+
+export default function PlayerControls() {
+	const { isPlaying, shuffle, togglePlayCurrent, next, previous, toggleShuffle } =
+		useMusicPlayer();
+
+	return (
+		<div className="flex items-center justify-center gap-1">
+			<Button type="button" size="icon" variant="ghost" aria-label="Previous track" onClick={previous}>
+				<SkipBack />
+			</Button>
+			<Button
+				type="button"
+				size="icon-lg"
+				variant="secondary"
+				aria-label={isPlaying ? "Pause" : "Play"}
+				onClick={togglePlayCurrent}
+			>
+				{isPlaying ? <Pause /> : <Play />}
+			</Button>
+			<Button type="button" size="icon" variant="ghost" aria-label="Skip to next track" onClick={next}>
+				<SkipForward />
+			</Button>
+			<Button
+				type="button"
+				size="icon"
+				variant={shuffle ? "secondary" : "ghost"}
+				aria-label={shuffle ? "Shuffle on" : "Shuffle off"}
+				aria-pressed={shuffle}
+				onClick={toggleShuffle}
+			>
+				<Shuffle />
+			</Button>
+		</div>
+	);
+}

src/app/music/page.tsx

@@ -15,11 +15,11 @@ export default function MusicPage() {
     <ScrollArea className="px-10 lg:px-0 w-full h-full max-w-4xl mx-auto pt-10">
 			<AnimatedPageTitle position={0}><span>Just Some </span> <span>Music I Made</span> </AnimatedPageTitle>
 			<div className="flex flex-wrap h-fit content-center">
-				<AnimateTextIn className="flex flex-wrap mr-[1em]" position={0.5}>
+				<AnimateTextIn once className="flex flex-wrap mr-[1em]" position={0.5}>
 					<div><p className="break-after-avoid mr-[1em]">All works on this page are licensed under:</p></div>
 					<div><a href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a></div>
 				</AnimateTextIn>
-				<AnimatePopUp position={2} className="items-center content-center">
+				<AnimatePopUp duration={1} ease='elastic.inOut' position={2} once className="items-center content-center">
 					<div className="flex flex-row">
 						<img className="max-w-[1em]" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg" alt="" />
 						<img className="max-w-[1em] ml-[1em]" src="https://mirrors.creativecommons.org/presskit/icons/by.svg" alt="" />
@@ -33,7 +33,7 @@ export default function MusicPage() {
 				<div key={track.id}>
 					<Card.AnimatedCard position={i + 1}>
 						<Card.CardHeader>
-							<AnimateTextIn position={i + 1.2} animation="slide">
+							<AnimateTextIn once position={i + 1.2} animation="slide">
 								<Card.CardTitle>{track.title}</Card.CardTitle>
 							</AnimateTextIn>
 						</Card.CardHeader>
@@ -41,8 +41,9 @@ export default function MusicPage() {
 							{track.description && (
 								<p className="text-sm text-muted-foreground gsapant">{track.description}</p>
 							)}
-							<AnimatePopUp position={i + 1.3}>
+							<AnimatePopUp duration={2} ease='elastic.inOut'  position={i + 1.3} once>
 								<AudioPlayer
+									id={track.id}
 									src={track.streamUrl ?? track.fileUrl}
 									downloadUrl={track.fileUrl}
 									downloadName={track.fileName}

src/app/projects/page.tsx

@@ -4,14 +4,13 @@ import { trpc } from "~/app/_trpc/Client";
 import * as Card from "~/components/ui/card";
 import { Badge } from "~/components/ui/badge";
 import { StackBadge } from "~/components/StackBadge";
-import Markdown from "react-markdown";
 import { ScrollArea } from "~/components/ui/scroll-area";
 import AnimatedPageTitle from "../_components/Animated/AnimatedPageTitle";
 import AnimateTextIn from "../_components/Animated/AnimateIn";
 import { useTimeLine } from "../_providers/GsapProvicer";
 import AnimatePopUp from "../_components/Animated/AnimatePopUp";
 import { Button } from "~/components/ui/button";
-import remarkGfm from "remark-gfm"
+import { ClientMdx } from "~/components/ClientMdx";
 
 export default function ProjectsPage() {
   const { data: projects, isLoading } = trpc.projectv2.listWithStack.useQuery();
@@ -63,7 +62,7 @@ export default function ProjectsPage() {
                 {project.description && (
                   <div className="prose prose-sm dark:prose-invert max-w-none text-muted-foreground">
                     <AnimatePopUp once position={i + 1.4} duration={10}>
-                      <Markdown remarkPlugins={[remarkGfm]}>{project.description}</Markdown>
+                      <ClientMdx source={project.description} fallback={project.description} />
                     </AnimatePopUp>
                   </div>
                 )}
@@ -111,11 +110,6 @@ export default function ProjectsPage() {
           <div className="pt-5" />
         </div>
       ))}
-      {/* Scroll runway: lets the last cards' ScrollTrigger exit points be
-          reached past the visible area, so on short viewports the second-to-last
-          card animates out off-screen instead of being frozen mid-exit at the
-          bottom of the scroll. Tune the height if a card is still caught. */}
-      <div aria-hidden className="h-[70dvh] shrink-0" />
     </ScrollArea>
   );
 }

src/components/ClientMdx.tsx

@@ -0,0 +1,79 @@
+"use client";
+
+import { evaluate } from "@mdx-js/mdx";
+import { MDXProvider, useMDXComponents } from "@mdx-js/react";
+import type { MDXComponents } from "mdx/types";
+import { useEffect, useState, type ComponentType, type ReactNode } from "react";
+import * as runtime from "react/jsx-runtime";
+import rehypeHighlight from "rehype-highlight";
+import remarkGfm from "remark-gfm";
+import { mdxComponents } from "~/components/mdx-components";
+
+type MdxModule = {
+  default: ComponentType<{ components?: MDXComponents }>;
+};
+
+type ClientMdxProps = {
+  source: string;
+  components?: MDXComponents;
+  format?: "md" | "mdx";
+  fallback?: ReactNode;
+  errorFallback?: (error: Error) => ReactNode;
+};
+
+export function ClientMdx({
+  source,
+  components = mdxComponents,
+  format = "md",
+  fallback = null,
+  errorFallback,
+}: ClientMdxProps) {
+  const [Content, setContent] = useState<MdxModule["default"] | null>(null);
+  const [error, setError] = useState<Error | null>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    const trimmed = source.trim();
+
+    if (!trimmed) {
+      setContent(null);
+      setError(null);
+      return;
+    }
+
+    void evaluate(trimmed, {
+      ...runtime,
+      baseUrl: import.meta.url,
+      format,
+      useMDXComponents,
+      rehypePlugins: [rehypeHighlight],
+      remarkPlugins: [remarkGfm],
+    })
+      .then((mod) => {
+        if (cancelled) return;
+        setContent(() => (mod as MdxModule).default);
+        setError(null);
+      })
+      .catch((nextError: unknown) => {
+        if (cancelled) return;
+        setContent(null);
+        setError(nextError instanceof Error ? nextError : new Error("Failed to render MDX"));
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [format, source]);
+
+  if (error) {
+    return errorFallback ? errorFallback(error) : <p>{source}</p>;
+  }
+
+  if (!Content) return <>{fallback}</>;
+
+  return (
+    <MDXProvider components={components}>
+      <Content components={components} />
+    </MDXProvider>
+  );
+}

src/components/mdx-components.tsx

@@ -1,5 +1,10 @@
 import Link from "next/link";
-import { Children, isValidElement, type ComponentPropsWithoutRef, type ReactNode } from "react";
+import {
+  Children,
+  isValidElement,
+  type ComponentPropsWithoutRef,
+  type ReactNode,
+} from "react";
 import { Badge } from "~/components/ui/badge";
 import { Button } from "~/components/ui/button";
 import { cn } from "~/lib/utils";

src/components/ui/card.tsx

@@ -1,3 +1,4 @@
+"use client"
 import * as React from "react"
 import { useRef } from "react";
 import gsap from 'gsap'

src/server/dbschema/schema.ts

@@ -175,6 +175,7 @@ export const chatMessageRelations = relations(chatMessage, ({ one }) => ({
 export const systemSettings = createTable(
 	"systemSetting",
 	(d) => ({
-		systemPropmt: d.text()
+		systemPropmt: d.text(),
+		model: d.text()
 	})
 )

src/server/routers/blog.ts

@@ -305,6 +305,25 @@ export const blogRouter = router({
     };
   }),
 
+  metadataBySlug: publicProcedure.input(z.string()).query(async ({ input: slug }) => {
+    const post = await db.query.blogPost.findFirst({
+      where(fields, operators) {
+        return operators.eq(fields.slug, slug);
+      },
+    });
+
+    if (!post) throw new TRPCError({ code: "NOT_FOUND", message: `Post "${slug}" not found` });
+
+    return {
+      slug: post.slug,
+      title: post.title,
+      date: post.date,
+      description: post.description,
+      tags: post.tags ?? [],
+      fileUrl: post.fileUrl,
+    };
+  }),
+
   syncFromUploadThing: publicProcedure.mutation(async () => {
     await assertAdmin();
 

src/server/routers/chat.ts

@@ -7,6 +7,26 @@ import { isAdmin } from '~/app/actions';
 import { z } from 'zod';
 import { eq } from 'drizzle-orm';
 import { clerkClient, auth } from '@clerk/nextjs/server'
+import { env } from '~/env'
+
+export const DEFAULT_MODEL = 'gpt-5-mini'
+
+// Models returned by the OpenAI API that aren't usable for chat completions.
+const NON_CHAT_MODEL = /embedding|image|audio|realtime|transcribe|tts|whisper|moderation|dall-e|search|codex|instruct/
+
+async function readSettings() {
+	return db.select().from(systemSettings).limit(1).then((r) => r[0])
+}
+
+async function writeSettings(values: { systemPropmt?: string | null; model?: string | null }) {
+	const current = await readSettings()
+	await db.delete(systemSettings)
+	await db.insert(systemSettings).values({
+		systemPropmt: values.systemPropmt ?? current?.systemPropmt ?? null,
+		model: values.model ?? current?.model ?? null,
+	})
+}
+
 export const chatRouter = router({
   getSession: publicProcedure.query(async () => {
     const { userId } = await auth();
@@ -66,13 +86,34 @@ export const chatRouter = router({
 
   }),
   getSystemPrompt: publicProcedure.query(async () => {
-    const row = await db.select().from(systemSettings).limit(1).then((r) => r[0])
+    const row = await readSettings()
     return row?.systemPropmt ?? ''
   }),
   updateSystemPrompt: publicProcedure.input(z.object({ prompt: z.string() })).mutation(async ({ input }) => {
     if (!(await isAdmin())) throw new TRPCError({ code: 'FORBIDDEN' })
-    await db.delete(systemSettings)
+    await writeSettings({ systemPropmt: input.prompt })
-    await db.insert(systemSettings).values({ systemPropmt: input.prompt })
+  }),
+  getModel: publicProcedure.query(async () => {
+    const row = await readSettings()
+    return row?.model ?? DEFAULT_MODEL
+  }),
+  listModels: publicProcedure.query(async () => {
+    if (!(await isAdmin())) throw new TRPCError({ code: 'FORBIDDEN' })
+    const res = await fetch('https://api.openai.com/v1/models', {
+      headers: { Authorization: `Bearer ${env.OPENAI_API_KEY}` },
+    })
+    if (!res.ok) {
+      throw new TRPCError({ code: 'INTERNAL_SERVER_ERROR', message: `failed to fetch models (${res.status})` })
+    }
+    const json = (await res.json()) as { data: { id: string }[] }
+    return json.data
+      .map((m) => m.id)
+      .filter((id) => (id.startsWith('gpt') || /^o\d/.test(id) || id.startsWith('chatgpt')) && !NON_CHAT_MODEL.test(id))
+      .sort()
+  }),
+  updateModel: publicProcedure.input(z.object({ model: z.string() })).mutation(async ({ input }) => {
+    if (!(await isAdmin())) throw new TRPCError({ code: 'FORBIDDEN' })
+    await writeSettings({ model: input.model })
   }),
 })
 

src/server/trpc.ts

@@ -1,5 +1,8 @@
 import { initTRPC } from "@trpc/server"
+import superjson from "superjson"
 
-const t = initTRPC.create();
+const t = initTRPC.create({
+	transformer: superjson,
+});
 export const router = t.router;
 export const publicProcedure = t.procedure;