feat(studio): timeline UI overhaul — flat clips, thumbnails, visual cleanup

packages/cli/src/server/studioServer.ts

@@ -349,7 +349,13 @@ export function createStudioServer(options: StudioServerOptions): StudioServer {
         }, opts.seekTime);
         const manifestContent = readStudioManualEditManifestContent(opts.project.dir);
         await applyStudioManualEditsToThumbnailPage(page, manifestContent, opts.compPath);
-        await page.evaluate(() => document.fonts?.ready);
+        await page.evaluate(() => {
+          void document.fonts?.ready;
+          const body = document.body;
+          if (body && getComputedStyle(body).backgroundColor === "rgba(0, 0, 0, 0)") {
+            body.style.backgroundColor = "#1c2028";
+          }
+        });
         await new Promise((r) => setTimeout(r, 200));
         await reapplyStudioManualEditsToThumbnailPage(page);
         let clip: ScreenshotClip | undefined;

packages/studio/src/hooks/useRenderClipContent.test.ts

@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+import { normalizeCompositionSrc } from "./useRenderClipContent";
+
+describe("normalizeCompositionSrc", () => {
+  const origin = "http://localhost:5190";
+  const pid = "my-project";
+
+  it("strips absolute preview URL to relative path", () => {
+    const result = normalizeCompositionSrc(
+      "http://localhost:5190/api/projects/my-project/preview/compositions/intro.html",
+      pid,
+      origin,
+    );
+    expect(result).toBe("compositions/intro.html");
+  });
+
+  it("preserves already-relative paths", () => {
+    const result = normalizeCompositionSrc("compositions/intro.html", pid, origin);
+    expect(result).toBe("compositions/intro.html");
+  });
+
+  it("preserves absolute URLs from different origins", () => {
+    const result = normalizeCompositionSrc(
+      "https://cdn.example.com/compositions/intro.html",
+      pid,
+      origin,
+    );
+    expect(result).toBe("https://cdn.example.com/compositions/intro.html");
+  });
+
+  it("preserves absolute URLs for different projects", () => {
+    const result = normalizeCompositionSrc(
+      "http://localhost:5190/api/projects/other-project/preview/compositions/intro.html",
+      pid,
+      origin,
+    );
+    expect(result).toBe(
+      "http://localhost:5190/api/projects/other-project/preview/compositions/intro.html",
+    );
+  });
+
+  it("handles nested composition paths", () => {
+    const result = normalizeCompositionSrc(
+      "http://localhost:5190/api/projects/my-project/preview/compositions/scenes/hero.html",
+      pid,
+      origin,
+    );
+    expect(result).toBe("compositions/scenes/hero.html");
+  });
+});

packages/studio/src/hooks/useRenderClipContent.ts

@@ -5,6 +5,23 @@ import type { TimelineElement } from "../player";
 import { AudioWaveform } from "../player/components/AudioWaveform";
 import { getTimelineElementLabel } from "../utils/studioHelpers";
 
+export function normalizeCompositionSrc(
+  compSrc: string,
+  projectId: string,
+  origin: string,
+): string {
+  try {
+    const parsed = new URL(compSrc, origin);
+    const previewPrefix = `/api/projects/${projectId}/preview/`;
+    if (parsed.pathname.startsWith(previewPrefix)) {
+      return parsed.pathname.slice(previewPrefix.length);
+    }
+  } catch {
+    // already relative
+  }
+  return compSrc;
+}
+
 interface UseRenderClipContentOptions {
   projectIdRef: { current: string | null };
   compIdToSrc: Map<string, string>;
@@ -23,8 +40,10 @@ export function useRenderClipContent({
       const pid = projectIdRef.current;
       if (!pid) return null;
 
-      // Resolve composition source path using the compIdToSrc map
       let compSrc = el.compositionSrc;
+      if (compSrc) {
+        compSrc = normalizeCompositionSrc(compSrc, pid, window.location.origin);
+      }
       if (compSrc && compIdToSrc.size > 0) {
         const resolved =
           compIdToSrc.get(el.id) ||
@@ -40,7 +59,7 @@ export function useRenderClipContent({
           previewUrl: `/api/projects/${pid}/preview/comp/${compSrc}`,
           label: getTimelineElementLabel(el),
           labelColor: style.label,
-          accentColor: style.clip,
+
           seekTime: 0,
           duration: el.duration,
         });
@@ -53,7 +72,7 @@ export function useRenderClipContent({
           previewUrl: activePreviewUrl,
           label: getTimelineElementLabel(el),
           labelColor: style.label,
-          accentColor: style.clip,
+
           selector: el.selector,
           selectorIndex: el.selectorIndex,
           seekTime: el.start,
@@ -109,7 +128,7 @@ export function useRenderClipContent({
           previewUrl: `/api/projects/${pid}/preview`,
           label: getTimelineElementLabel(el),
           labelColor: style.label,
-          accentColor: style.clip,
+
           selector: el.selector,
           selectorIndex: el.selectorIndex,
           seekTime: el.start,

packages/studio/src/player/components/CompositionThumbnail.tsx

@@ -5,7 +5,6 @@ interface CompositionThumbnailProps {
   previewUrl: string;
   label: string;
   labelColor: string;
-  accentColor?: string;
   selector?: string;
   selectorIndex?: number;
   seekTime?: number;
@@ -16,7 +15,6 @@ interface CompositionThumbnailProps {
 
 const CLIP_HEIGHT = 66;
 const THUMBNAIL_URL_VERSION = "v3";
-const COMPOSITION_THUMBNAIL_LABEL_Z_INDEX = 10;
 
 export function buildCompositionThumbnailUrl({
   previewUrl,
@@ -53,7 +51,6 @@ export const CompositionThumbnail = memo(function CompositionThumbnail({
   previewUrl,
   label,
   labelColor,
-  accentColor = "#6B7280",
   selector,
   selectorIndex,
   seekTime = 2,
@@ -110,8 +107,11 @@ export const CompositionThumbnail = memo(function CompositionThumbnail({
         className="hidden"
       />
 
-      {loaded ? (
-        <div className="absolute inset-0 flex">
+      {loaded && (
+        <div
+          className="absolute inset-0 flex"
+          style={{ animation: "hf-thumb-fade 200ms ease-out", mixBlendMode: "lighten" }}
+        >
           {Array.from({ length: frameCount }).map((_, i) => (
             <div
               key={i}
@@ -122,59 +122,25 @@ export const CompositionThumbnail = memo(function CompositionThumbnail({
                 src={url}
                 alt=""
                 draggable={false}
-                className="absolute inset-0 h-full w-full object-cover opacity-60"
+                className="absolute inset-0 h-full w-full object-cover"
+                style={{ opacity: 0.7 }}
               />
             </div>
           ))}
         </div>
-      ) : (
-        <div
-          className="absolute inset-0 animate-pulse"
-          style={{
-            background:
-              "linear-gradient(90deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.02) 100%)",
-          }}
-        />
       )}
 
-      <div
-        className="absolute inset-0"
-        style={{
-          background: `linear-gradient(120deg, ${accentColor}2e, transparent 34%), linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.08))`,
-        }}
-      />
-
-      <div
-        className="absolute left-2 top-2"
-        style={{ zIndex: COMPOSITION_THUMBNAIL_LABEL_Z_INDEX }}
-      >
+      <div className="absolute left-3 top-0 bottom-0 flex items-center" style={{ zIndex: 10 }}>
         <span
-          className="block max-w-full truncate rounded-md px-1.5 py-0.5 text-[9px] font-semibold uppercase leading-none"
+          className="block max-w-full truncate text-[10px] font-semibold leading-none"
           style={{
             color: labelColor,
-            background: `${accentColor}2e`,
-            boxShadow: `inset 0 0 0 1px ${accentColor}40`,
+            textShadow: loaded ? "0 1px 4px rgba(0,0,0,0.9), 0 0 8px rgba(0,0,0,0.6)" : "none",
           }}
         >
           {label}
         </span>
       </div>
-
-      <div
-        className="absolute bottom-0 left-0 right-0 px-1.5 pb-0.5 pt-3"
-        style={{
-          zIndex: COMPOSITION_THUMBNAIL_LABEL_Z_INDEX,
-          background:
-            "linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.4) 60%, transparent 100%)",
-        }}
-      >
-        <span
-          className="block truncate text-[9px] font-semibold leading-tight"
-          style={{ color: labelColor, textShadow: "0 1px 2px rgba(0,0,0,0.9)" }}
-        >
-          {label}
-        </span>
-      </div>
     </div>
   );
 });

packages/studio/src/player/components/TimelineCanvas.tsx

@@ -10,7 +10,6 @@ import { getRenderedTimelineElement, type TimelineTheme } from "./timelineTheme"
 import { GUTTER, TRACK_H, RULER_H, CLIP_Y, CLIP_HANDLE_W } from "./timelineLayout";
 import type { TimelineElement } from "../store/playerStore";
 import type { DraggedClipState, ResizingClipState, BlockedClipState } from "./useTimelineClipDrag";
-import { formatTime } from "../lib/time";
 import type { TrackVisualStyle } from "./timelineIcons";
 
 interface TimelineCanvasProps {
@@ -134,28 +133,16 @@ export const TimelineCanvas = memo(function TimelineCanvas({
         className={
           renderClipContent
             ? "absolute inset-0 overflow-hidden"
-            : "flex flex-col justify-center overflow-hidden flex-1 min-w-0 px-6"
+            : "flex items-center overflow-hidden flex-1 min-w-0 px-3 gap-2"
         }
       >
         {renderClipContent?.(element, clipStyle) ?? (
-          <div className="flex h-full min-h-0 flex-col justify-between py-3">
-            <span
-              className="max-w-full truncate rounded-md px-1.5 py-0.5 text-[10px] font-semibold uppercase tracking-[0.08em] leading-none"
-              style={{
-                color: clipStyle.label,
-                background: `${clipStyle.accent}26`,
-                boxShadow: `inset 0 0 0 1px ${clipStyle.accent}33`,
-              }}
-            >
-              {element.tag}
-            </span>
-            <span
-              className="max-w-full truncate rounded-md px-1.5 py-0.5 text-[10px] font-medium tabular-nums leading-none"
-              style={{ color: theme.textSecondary, background: "rgba(255,255,255,0.04)" }}
-            >
-              {formatTime(element.start)} {"→"} {formatTime(element.start + element.duration)}
-            </span>
-          </div>
+          <span
+            className="truncate text-[10px] font-medium leading-none"
+            style={{ color: clipStyle.label }}
+          >
+            {element.label || element.id || element.tag}
+          </span>
         )}
       </div>
     </>
@@ -221,10 +208,9 @@ export const TimelineCanvas = memo(function TimelineCanvas({
                     paddingLeft: 16,
                     color: ts.label,
                     fontSize: 11,
-                    letterSpacing: "0.08em",
+                    letterSpacing: "0.06em",
                     textTransform: "uppercase",
-                    background: `linear-gradient(90deg, ${ts.accent}14, transparent 28%)`,
-                    boxShadow: `inset 0 0 0 1px ${ts.accent}24`,
+                    opacity: 0.5,
                   }}
                 >
                   New track