chore(format): run prettier over src/ and scripts/

Formatting was configured but never enforced: `bun run format:check`
reported 199 unformatted files and ran in no workflow and in no git hook,
so .prettierrc (printWidth 100, trailing commas) described an intention
rather than the tree.

This is the one-time sweep that makes the check gateable. Whitespace and
token-reflow only -- no behavioural change: `bun run check` reports 0
errors and all 1053 frontend tests pass before and after.

Kept out of every other commit on purpose. A 199-file diff mixed with
real changes is unreviewable, and the next commit turns format:check
into a hard CI gate so this cannot silently accumulate again.

src/lib/components/player/VideoPlayer.touchScrub.test.ts

@@ -139,9 +139,7 @@ async function mountAndroidPlayer() {
   await waitFor(() => expect(playerPlayItem).toHaveBeenCalled());
   await waitFor(() => expect(playerStop).toHaveBeenCalled());
 
-  const slider = utils.container.querySelector(
-    'input[type="range"]'
-  ) as HTMLInputElement;
+  const slider = utils.container.querySelector('input[type="range"]') as HTMLInputElement;
   const video = utils.container.querySelector("video") as HTMLVideoElement;
   expect(slider).not.toBeNull();
   return { ...utils, slider, video };
@@ -157,11 +155,7 @@ function touch(x: number, y: number) {
  * A real drag along the bar moves the finger far enough that the container's
  * swipe detector (50px) would trigger if it were still listening.
  */
-async function touchScrubTo(
-  slider: HTMLInputElement,
-  video: HTMLVideoElement,
-  target: number
-) {
+async function touchScrubTo(slider: HTMLInputElement, video: HTMLVideoElement, target: number) {
   await fireEvent.touchStart(slider, { touches: [touch(100, 700)] });
   // Finger travels across the bar. Small vertical wander is normal for a thumb
   // drag; the horizontal travel is what matters.
@@ -187,7 +181,7 @@ describe("VideoPlayer seek bar — touch drag (Android)", () => {
     await touchScrubTo(slider, video, 600);
 
     await waitFor(() =>
-      expect(playerSeekVideo).toHaveBeenCalledWith("repo-1", 600, "src-1", null, true)
+      expect(playerSeekVideo).toHaveBeenCalledWith("repo-1", 600, "src-1", null, true),
     );
     expect(parseFloat(slider.value)).toBeCloseTo(600);
   });
@@ -216,7 +210,7 @@ describe("VideoPlayer seek bar — touch drag (Android)", () => {
     await tick();
 
     await waitFor(() =>
-      expect(playerSeekVideo).toHaveBeenCalledWith("repo-1", 600, "src-1", null, true)
+      expect(playerSeekVideo).toHaveBeenCalledWith("repo-1", 600, "src-1", null, true),
     );
   });