diff --git a/.gitignore b/.gitignore
index 00349cae8..62fba393e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,7 +62,8 @@ tmp/
 packages/core/src/generated/
 packages/producer/src/services/fontData.generated.ts
 
-# Test artifacts
+# Local proof / test artifacts
+qa-artifacts/
 my-video/
 examples/
 packages/studio/data/
diff --git a/docs/packages/cli.mdx b/docs/packages/cli.mdx
index 120bd7fc9..f2f6cc8bf 100644
--- a/docs/packages/cli.mdx
+++ b/docs/packages/cli.mdx
@@ -162,7 +162,7 @@ This is suppressed in CI environments, non-TTY shells, and when `HYPERFRAMES_NO_
     | Flag | Description |
     |------|-------------|
     | `--example, -e` | Example to scaffold (required in default mode, interactive in `--human-friendly`) |
-    | `--resolution` | Canvas preset: `landscape` (1920×1080), `portrait` (1080×1920), `landscape-4k` (3840×2160), `portrait-4k` (2160×3840). Aliases: `1080p`, `4k`, `uhd`. Default: keep template dimensions. |
+    | `--resolution` | Canvas preset: `landscape` (1920×1080), `portrait` (1080×1920), `landscape-4k` (3840×2160), `portrait-4k` (2160×3840), `square` (1080×1080), `square-4k` (2160×2160). Aliases: `1080p`, `4k`, `uhd`, `1080p-square`, `square-1080p`, `4k-square`. Default: keep template dimensions. |
     | `--video, -V` | Path to a video file (MP4, WebM, MOV) |
     | `--audio, -a` | Path to an audio file (MP3, WAV, M4A) |
     | `--tailwind` | Add Tailwind CSS browser-runtime support to scaffolded HTML |
@@ -610,7 +610,7 @@ This is suppressed in CI environments, non-TTY shells, and when `HYPERFRAMES_NO_
     | `--quality` | draft, standard, high | standard | Encoding quality preset (drives CRF/bitrate) |
     | `--crf` | 0-51 | — | Override encoder CRF (lower = higher quality). Mutually exclusive with `--video-bitrate` |
     | `--video-bitrate` | e.g. `10M`, `5000k` | — | Target video bitrate. Mutually exclusive with `--crf` |
-    | `--resolution` | landscape, portrait, landscape-4k, portrait-4k (aliases: `1080p`, `4k`, `uhd`) | — | Output resolution preset. Supersamples a smaller composition via Chrome `deviceScaleFactor` so the screenshot lands at the requested dimensions. Aspect ratio must match the composition; the scale must be an integer multiple. Not supported with `--hdr`. See [4K Rendering](/guides/4k-rendering) |
+    | `--resolution` | landscape, portrait, landscape-4k, portrait-4k, square, square-4k (aliases: `1080p`, `4k`, `uhd`, `1080p-square`, `square-1080p`, `4k-square`) | — | Output resolution preset. Supersamples a smaller composition via Chrome `deviceScaleFactor` so the screenshot lands at the requested dimensions. Aspect ratio must match the composition; the scale must be an integer multiple. Not supported with `--hdr`. See [4K Rendering](/guides/4k-rendering) |
     | `--hdr` | — | off | Force HDR output even if no HDR sources are detected. MP4 only. See [HDR Rendering](/guides/hdr) |
     | `--sdr` | — | off | Force SDR output even if HDR sources are detected |
     | `--workers` | 1-8 | 4 | Parallel render workers |
diff --git a/docs/packages/core.mdx b/docs/packages/core.mdx
index 56c32b4cd..22e41c798 100644
--- a/docs/packages/core.mdx
+++ b/docs/packages/core.mdx
@@ -51,7 +51,7 @@ import type {
   TimelineElementType,       // "video" | "image" | "text" | "audio" | "composition"
   CompositionSpec,
   CompositionVariable,
-  CanvasResolution,          // "landscape" | "portrait"
+  CanvasResolution,          // "landscape" | "portrait" | "landscape-4k" | "portrait-4k" | "square" | "square-4k"
   Orientation,               // "16:9" | "9:16"
   FrameAdapter,
   FrameAdapterContext,
diff --git a/packages/cli/src/commands/init.test.ts b/packages/cli/src/commands/init.test.ts
index 59cfa7ca4..16ebc8391 100644
--- a/packages/cli/src/commands/init.test.ts
+++ b/packages/cli/src/commands/init.test.ts
@@ -207,6 +207,38 @@ describe("applyResolutionPreset", () => {
     });
   });
 
+  it("swaps to square dimensions for square", () => {
+    withFixture((dir) => {
+      const file = join(dir, "index.html");
+      writeFileSync(file, sampleHtml, "utf-8");
+
+      applyResolutionPreset(dir, "square");
+      const out = readFileSync(file, "utf-8");
+
+      expect(out).toContain('data-width="1080"');
+      expect(out).toContain('data-height="1080"');
+      expect(out).toContain('data-resolution="square"');
+      expect(out).toContain("width: 1080px");
+      expect(out).toContain("height: 1080px");
+    });
+  });
+
+  it("swaps to square-4k dimensions", () => {
+    withFixture((dir) => {
+      const file = join(dir, "index.html");
+      writeFileSync(file, sampleHtml, "utf-8");
+
+      applyResolutionPreset(dir, "square-4k");
+      const out = readFileSync(file, "utf-8");
+
+      expect(out).toContain('data-width="2160"');
+      expect(out).toContain('data-height="2160"');
+      expect(out).toContain('data-resolution="square-4k"');
+      expect(out).toContain("width: 2160px");
+      expect(out).toContain("height: 2160px");
+    });
+  });
+
   it("scaffolds a 4k project end-to-end via --resolution 4k", () => {
     const dir = mkdtempSync(join(tmpdir(), "hf-init-test-"));
     const target = join(dir, "proj");
diff --git a/packages/cli/src/commands/init.ts b/packages/cli/src/commands/init.ts
index 196820aee..8e48104da 100644
--- a/packages/cli/src/commands/init.ts
+++ b/packages/cli/src/commands/init.ts
@@ -626,7 +626,7 @@ export default defineCommand({
     resolution: {
       type: "string",
       description:
-        "Canvas resolution preset: landscape (1920x1080), portrait (1080x1920), landscape-4k (3840x2160), portrait-4k (2160x3840). Aliases: 1080p, 4k, uhd. Default: keep template dimensions (typically 1920x1080).",
+        "Canvas resolution preset: landscape (1920x1080), portrait (1080x1920), landscape-4k (3840x2160), portrait-4k (2160x3840), square (1080x1080), square-4k (2160x2160). Aliases: 1080p, 4k, uhd, 1080p-square, square-1080p, 4k-square. Default: keep template dimensions (typically 1920x1080).",
     },
   },
   async run({ args }) {
@@ -658,7 +658,8 @@ export default defineCommand({
         console.error(
           c.error(
             `Invalid --resolution: "${args.resolution}". ` +
-              `Use one of: landscape, portrait, landscape-4k, portrait-4k (or aliases 1080p, 4k, uhd).`,
+              `Use one of: landscape, portrait, landscape-4k, portrait-4k, square, square-4k ` +
+              `(or aliases 1080p, 4k, uhd, 1080p-square, square-1080p, 4k-square).`,
           ),
         );
         process.exit(1);
diff --git a/packages/cli/src/commands/render.ts b/packages/cli/src/commands/render.ts
index 56536dc8e..4df0b0d81 100644
--- a/packages/cli/src/commands/render.ts
+++ b/packages/cli/src/commands/render.ts
@@ -186,7 +186,7 @@ export default defineCommand({
     resolution: {
       type: "string",
       description:
-        "Output resolution preset: landscape (1920x1080), portrait (1080x1920), landscape-4k (3840x2160), portrait-4k (2160x3840). Aliases: 1080p, 4k, uhd. The composition is unchanged — Chrome renders at higher DPR (deviceScaleFactor) so the captured screenshot lands at the requested dimensions. Aspect ratio must match the composition; the scale must be an integer multiple. Not yet supported with --hdr.",
+        "Output resolution preset: landscape (1920x1080), portrait (1080x1920), landscape-4k (3840x2160), portrait-4k (2160x3840), square (1080x1080), square-4k (2160x2160). Aliases: 1080p, 4k, uhd, 1080p-square, square-1080p, 4k-square. The composition is unchanged — Chrome renders at higher DPR (deviceScaleFactor) so the captured screenshot lands at the requested dimensions. Aspect ratio must match the composition; the scale must be an integer multiple. Not yet supported with --hdr.",
     },
   },
   async run({ args }) {
@@ -224,7 +224,8 @@ export default defineCommand({
       if (!outputResolution) {
         errorBox(
           "Invalid resolution",
-          `Got "${args.resolution}". Must be one of: landscape, portrait, landscape-4k, portrait-4k (or aliases 1080p, 4k, uhd).`,
+          `Got "${args.resolution}". Must be one of: landscape, portrait, landscape-4k, portrait-4k, square, square-4k ` +
+            `(or aliases 1080p, 4k, uhd, 1080p-square, square-1080p, 4k-square).`,
         );
         process.exit(1);
       }
diff --git a/packages/core/src/core.types.ts b/packages/core/src/core.types.ts
index c3d069d31..e123b33dd 100644
--- a/packages/core/src/core.types.ts
+++ b/packages/core/src/core.types.ts
@@ -24,6 +24,8 @@ export const CANVAS_DIMENSIONS = {
   portrait: { width: 1080, height: 1920 },
   "landscape-4k": { width: 3840, height: 2160 },
   "portrait-4k": { width: 2160, height: 3840 },
+  square: { width: 1080, height: 1080 },
+  "square-4k": { width: 2160, height: 2160 },
 } as const;
 
 // Single source of truth: derive the type from the table so adding a preset
@@ -47,6 +49,9 @@ const RESOLUTION_ALIASES: Record<string, CanvasResolution> = {
   "4k": "landscape-4k",
   uhd: "landscape-4k",
   "4k-portrait": "portrait-4k",
+  "1080p-square": "square",
+  "square-1080p": "square",
+  "4k-square": "square-4k",
 };
 
 /**
diff --git a/packages/core/src/index.test.ts b/packages/core/src/index.test.ts
index bae8a15aa..2e406b5c2 100644
--- a/packages/core/src/index.test.ts
+++ b/packages/core/src/index.test.ts
@@ -10,6 +10,8 @@ describe("@hyperframes/core public API exports", () => {
       expect(core.CANVAS_DIMENSIONS.portrait).toEqual({ width: 1080, height: 1920 });
       expect(core.CANVAS_DIMENSIONS["landscape-4k"]).toEqual({ width: 3840, height: 2160 });
       expect(core.CANVAS_DIMENSIONS["portrait-4k"]).toEqual({ width: 2160, height: 3840 });
+      expect(core.CANVAS_DIMENSIONS.square).toEqual({ width: 1080, height: 1080 });
+      expect(core.CANVAS_DIMENSIONS["square-4k"]).toEqual({ width: 2160, height: 2160 });
     });
 
     it("exports VALID_CANVAS_RESOLUTIONS derived from CANVAS_DIMENSIONS", () => {
@@ -18,6 +20,8 @@ describe("@hyperframes/core public API exports", () => {
         "portrait",
         "landscape-4k",
         "portrait-4k",
+        "square",
+        "square-4k",
       ]);
     });
 
@@ -27,6 +31,10 @@ describe("@hyperframes/core public API exports", () => {
       expect(core.normalizeResolutionFlag("1080p")).toBe("landscape");
       expect(core.normalizeResolutionFlag("landscape-4k")).toBe("landscape-4k");
       expect(core.normalizeResolutionFlag("UHD")).toBe("landscape-4k");
+      expect(core.normalizeResolutionFlag("square")).toBe("square");
+      expect(core.normalizeResolutionFlag("square-4k")).toBe("square-4k");
+      expect(core.normalizeResolutionFlag("1080p-square")).toBe("square");
+      expect(core.normalizeResolutionFlag("4k-square")).toBe("square-4k");
       expect(core.normalizeResolutionFlag("8k")).toBeUndefined();
       expect(core.normalizeResolutionFlag(undefined)).toBeUndefined();
     });
diff --git a/packages/core/src/parsers/htmlParser.test.ts b/packages/core/src/parsers/htmlParser.test.ts
index b913deb5b..841d26006 100644
--- a/packages/core/src/parsers/htmlParser.test.ts
+++ b/packages/core/src/parsers/htmlParser.test.ts
@@ -197,6 +197,21 @@ describe("parseHtml", () => {
     expect(result.resolution).toBe("portrait");
   });
 
+  it("keeps explicit portrait resolution even when dimensions are square", () => {
+    const html = `
+      <html data-resolution="portrait" data-composition-width="1080" data-composition-height="1080">
+      <body>
+        <div id="stage">
+          <div id="text1" data-start="0" data-end="5"><div>Hello</div></div>
+        </div>
+      </body>
+      </html>
+    `;
+    const result = parseHtml(html);
+
+    expect(result.resolution).toBe("portrait");
+  });
+
   it("defaults to portrait when no resolution info is available", () => {
     const html = `
       <html>
@@ -275,10 +290,7 @@ describe("parseHtml", () => {
     expect(result.resolution).toBe("landscape");
   });
 
-  it("classifies square compositions as portrait by convention", () => {
-    // 1080×1080 has no obvious orientation. The parser collapses the tie to
-    // portrait — same bias the prior `w > h ? landscape : portrait` ternary
-    // had. Pinning so a future refactor doesn't silently flip it.
+  it("infers square resolution from equal width/height", () => {
     const html = `
       <html data-composition-width="1080" data-composition-height="1080">
       <body>
@@ -290,7 +302,22 @@ describe("parseHtml", () => {
     `;
     const result = parseHtml(html);
 
-    expect(result.resolution).toBe("portrait");
+    expect(result.resolution).toBe("square");
+  });
+
+  it("infers square-4k from equal width/height >= 2160", () => {
+    const html = `
+      <html data-composition-width="2160" data-composition-height="2160">
+      <body>
+        <div id="stage">
+          <div id="text1" data-start="0" data-end="5"><div>Hello</div></div>
+        </div>
+      </body>
+      </html>
+    `;
+    const result = parseHtml(html);
+
+    expect(result.resolution).toBe("square-4k");
   });
 
   it("extracts x, y, scale, opacity from data attributes", () => {
diff --git a/packages/core/src/parsers/htmlParser.ts b/packages/core/src/parsers/htmlParser.ts
index ba4c65ffb..f7d906349 100644
--- a/packages/core/src/parsers/htmlParser.ts
+++ b/packages/core/src/parsers/htmlParser.ts
@@ -124,7 +124,9 @@ function parseResolutionFromHtml(doc: Document): CanvasResolution | null {
     resolutionAttr === "landscape" ||
     resolutionAttr === "portrait" ||
     resolutionAttr === "landscape-4k" ||
-    resolutionAttr === "portrait-4k"
+    resolutionAttr === "portrait-4k" ||
+    resolutionAttr === "square" ||
+    resolutionAttr === "square-4k"
   ) {
     return resolutionAttr;
   }
@@ -143,17 +145,17 @@ function parseResolutionFromHtml(doc: Document): CanvasResolution | null {
 }
 
 function resolveResolutionFromDimensions(width: number, height: number): CanvasResolution {
-  // `width === height` (square) falls into the portrait branch by convention —
-  // the same bias the previous `w > h ? landscape : portrait` ternary used.
-  // Square compositions are rare; pick portrait-as-default so we don't surprise
-  // the existing call sites that depend on this behavior.
-  const isLandscape = width > height;
   const longSide = Math.max(width, height);
-  // UHD cutoff is the long side of `landscape-4k` / `portrait-4k` (3840). A
-  // looser threshold (e.g. ≥ 2560) would silently misclassify QHD/1440p
-  // (2560×1440) as 4K, which is the wrong default for a common authoring
-  // resolution closer to 1080p than to UHD. Authors who genuinely want the
-  // 4K preset can still set `data-resolution="landscape-4k"` explicitly.
+  // UHD cutoff is the long side of the 4K presets (3840 for `landscape-4k` /
+  // `portrait-4k`, 2160 for `square-4k`). A looser threshold (e.g. >= 2560)
+  // would silently misclassify QHD/1440p (2560x1440) as 4K, which is the
+  // wrong default for a common authoring resolution closer to 1080p than to
+  // UHD. Authors who genuinely want the 4K preset can still set
+  // `data-resolution="..."` explicitly.
+  if (width === height) {
+    return longSide >= 2160 ? "square-4k" : "square";
+  }
+  const isLandscape = width > height;
   const isUhd = longSide >= 3840;
   if (isLandscape) return isUhd ? "landscape-4k" : "landscape";
   return isUhd ? "portrait-4k" : "portrait";
diff --git a/packages/core/src/studio-api/routes/render.test.ts b/packages/core/src/studio-api/routes/render.test.ts
index bb702cf92..035a4660d 100644
--- a/packages/core/src/studio-api/routes/render.test.ts
+++ b/packages/core/src/studio-api/routes/render.test.ts
@@ -3,6 +3,7 @@ import { Hono } from "hono";
 import { mkdtempSync, rmSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
+import { VALID_CANVAS_RESOLUTIONS } from "../../core.types";
 import { registerRenderRoutes } from "./render";
 import type { StudioApiAdapter } from "../types";
 
@@ -98,8 +99,8 @@ describe("POST /projects/:id/render — outputResolution forwarding", () => {
     }
   });
 
-  it("accepts each of the four canonical preset values", async () => {
-    for (const preset of ["landscape", "portrait", "landscape-4k", "portrait-4k"] as const) {
+  it("accepts each canonical preset value", async () => {
+    for (const preset of VALID_CANVAS_RESOLUTIONS) {
       const spy = vi.fn();
       const { app, cleanup } = buildApp(spy);
       try {
diff --git a/packages/producer/src/services/renderOrchestrator.test.ts b/packages/producer/src/services/renderOrchestrator.test.ts
index 3dc0b6d59..b0a2f9eab 100644
--- a/packages/producer/src/services/renderOrchestrator.test.ts
+++ b/packages/producer/src/services/renderOrchestrator.test.ts
@@ -778,6 +778,17 @@ describe("resolveDeviceScaleFactor", () => {
     ).toBe(2);
   });
 
+  it("returns 2 for square 1080p → square-4k", () => {
+    expect(
+      resolveDeviceScaleFactor({
+        ...defaults,
+        compositionWidth: 1080,
+        compositionHeight: 1080,
+        outputResolution: "square-4k",
+      }),
+    ).toBe(2);
+  });
+
   it("returns 1 when the composition already matches the requested resolution", () => {
     expect(
       resolveDeviceScaleFactor({
@@ -815,6 +826,25 @@ describe("resolveDeviceScaleFactor", () => {
     ).toThrow(/aspect ratio/);
   });
 
+  it("rejects square comp → non-square 4K presets", () => {
+    for (const outputResolution of ["landscape-4k", "portrait-4k"] as const) {
+      expect(() =>
+        resolveDeviceScaleFactor({
+          ...defaults,
+          compositionWidth: 1080,
+          compositionHeight: 1080,
+          outputResolution,
+        }),
+      ).toThrow(/aspect ratio/);
+    }
+  });
+
+  it("rejects landscape comp → square-4k", () => {
+    expect(() => resolveDeviceScaleFactor({ ...defaults, outputResolution: "square-4k" })).toThrow(
+      /aspect ratio/,
+    );
+  });
+
   it("rejects downsampling (4K composition → 1080p output)", () => {
     expect(() =>
       resolveDeviceScaleFactor({
diff --git a/packages/studio/src/App.tsx b/packages/studio/src/App.tsx
index 311924df3..7eabb4b6e 100644
--- a/packages/studio/src/App.tsx
+++ b/packages/studio/src/App.tsx
@@ -157,6 +157,12 @@ function getTimelineElementLabel(element: TimelineElement): string {
   return element.label || element.id || element.tag;
 }
 
+function confirmElementDelete(label: string, kind: "timeline clip" | "element"): boolean {
+  return window.confirm(
+    `Delete ${kind} "${label}"?\n\nThis removes it from the project source. You can use Undo to restore it.`,
+  );
+}
+
 type RightPanelTab = "design" | "motion" | "renders";
 
 const GENERIC_FONT_FAMILIES = new Set([
@@ -1780,6 +1786,8 @@ export function StudioApp() {
     async (element: TimelineElement) => {
       const pid = projectIdRef.current;
       if (!pid) throw new Error("No active project");
+      const label = getTimelineElementLabel(element);
+      if (!confirmElementDelete(label, "timeline clip")) return;
 
       const targetPath = element.sourceFile || activeCompPath || "index.html";
       try {
@@ -1877,6 +1885,7 @@ export function StudioApp() {
           );
         usePlayerStore.getState().setSelectedElementId(null);
         setRefreshKey((k) => k + 1);
+        showToast(`Deleted ${label}. Use Undo to restore it.`, "info");
       } catch (error) {
         const message = error instanceof Error ? error.message : "Failed to delete timeline clip";
         showToast(message);
@@ -1889,6 +1898,8 @@ export function StudioApp() {
     async (selection: DomEditSelection) => {
       const pid = projectIdRef.current;
       if (!pid) return;
+      const label = selection.label || selection.id || selection.selector || selection.tagName;
+      if (!confirmElementDelete(label, "element")) return;
 
       const targetPath = selection.sourceFile || activeCompPath || "index.html";
       try {
@@ -1946,6 +1957,7 @@ export function StudioApp() {
         setDomEditGroupSelections([]);
         usePlayerStore.getState().setSelectedElementId(null);
         setRefreshKey((k) => k + 1);
+        showToast(`Deleted ${label}. Use Undo to restore it.`, "info");
       } catch (error) {
         const message = error instanceof Error ? error.message : "Failed to delete element";
         showToast(message);
diff --git a/packages/studio/src/components/editor/PropertyPanel.test.ts b/packages/studio/src/components/editor/PropertyPanel.test.ts
index 47301a21f..d3c2939fa 100644
--- a/packages/studio/src/components/editor/PropertyPanel.test.ts
+++ b/packages/studio/src/components/editor/PropertyPanel.test.ts
@@ -4,10 +4,8 @@ import {
   buildStrokeWidthStyleUpdates,
   getClipPathInsetPx,
   getCssFilterFunctionPx,
-  getPropertyPanelVisibleSections,
   inferBoxShadowPreset,
   inferClipPathPreset,
-  isPropertyPanelMediaLikeSelection,
   normalizePanelPxValue,
   setCssFilterFunctionPx,
 } from "./PropertyPanel";
@@ -66,51 +64,4 @@ describe("PropertyPanel style helpers", () => {
     expect(buildStrokeStyleUpdates("none", "4px")).toEqual([["border-style", "none"]]);
     expect(buildStrokeStyleUpdates("solid", "4px")).toEqual([["border-style", "solid"]]);
   });
-
-  it("orders the simplified default inspector sections around high-confidence edits", () => {
-    expect(
-      getPropertyPanelVisibleSections({
-        hasSelection: true,
-        canEditStyles: true,
-        hasTextControls: true,
-        hasColorControls: true,
-      }),
-    ).toEqual(["Text", "Layout", "Colors", "Radius", "Shadow"]);
-
-    expect(
-      getPropertyPanelVisibleSections({
-        hasSelection: true,
-        canEditStyles: true,
-        hasTextControls: false,
-        hasColorControls: false,
-      }),
-    ).toEqual(["Layout", "Radius", "Shadow"]);
-  });
-
-  it("treats media tags and background-image layers as image-like controls", () => {
-    expect(
-      isPropertyPanelMediaLikeSelection({
-        tagName: "img",
-        styles: {},
-      }),
-    ).toBe(true);
-
-    expect(
-      isPropertyPanelMediaLikeSelection({
-        tagName: "div",
-        styles: {
-          "background-image": "url(/assets/studio.png)",
-        },
-      }),
-    ).toBe(true);
-
-    expect(
-      isPropertyPanelMediaLikeSelection({
-        tagName: "div",
-        styles: {
-          "background-image": "none",
-        },
-      }),
-    ).toBe(false);
-  });
 });
diff --git a/packages/studio/src/components/renders/useRenderQueue.ts b/packages/studio/src/components/renders/useRenderQueue.ts
index d3c0aa446..4a65b20b8 100644
--- a/packages/studio/src/components/renders/useRenderQueue.ts
+++ b/packages/studio/src/components/renders/useRenderQueue.ts
@@ -14,8 +14,14 @@ export interface RenderJob {
 // Mirrors `CanvasResolution` from @hyperframes/core. Kept local because
 // studio's tsconfig doesn't include node types, and the core barrel
 // transitively pulls in modules with `node:fs` imports. Drift risk is
-// low (4 string literals tied to a stable enum).
-export type ResolutionPreset = "landscape" | "portrait" | "landscape-4k" | "portrait-4k";
+// low (6 string literals kept in sync manually with CANVAS_DIMENSIONS).
+export type ResolutionPreset =
+  | "landscape"
+  | "portrait"
+  | "landscape-4k"
+  | "portrait-4k"
+  | "square"
+  | "square-4k";
 
 export interface StartRenderOptions {
   fps?: number;
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diff --git a/qa-artifacts/studio-inspector-selection-ux/notion-showcase/image-selection.png b/qa-artifacts/studio-inspector-selection-ux/notion-showcase/image-selection.png
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diff --git a/qa-artifacts/studio-inspector-selection-ux/notion-showcase/raster-text-ask-agent-fallback.png b/qa-artifacts/studio-inspector-selection-ux/notion-showcase/raster-text-ask-agent-fallback.png
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diff --git a/qa-artifacts/studio-inspector-selection-ux/notion-showcase/raster-text-ask-agent-fallback.webm b/qa-artifacts/studio-inspector-selection-ux/notion-showcase/raster-text-ask-agent-fallback.webm
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diff --git a/qa-artifacts/studio-inspector-selection-ux/notion-showcase/text-selection.png b/qa-artifacts/studio-inspector-selection-ux/notion-showcase/text-selection.png
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diff --git a/qa-artifacts/studio-inspector-selection-ux/selection-flow.webm b/qa-artifacts/studio-inspector-selection-ux/selection-flow.webm
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diff --git a/qa-artifacts/studio-inspector-selection-ux/timeline-default-thumbnails.png b/qa-artifacts/studio-inspector-selection-ux/timeline-default-thumbnails.png
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diff --git a/qa-artifacts/studio-inspector-selection-ux/video-selection.png b/qa-artifacts/studio-inspector-selection-ux/video-selection.png
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