feat: major editor overhaul (assets, properties, timeline, fonts) (#709)

* feat: major editor overhaul (assets, properties, timeline, fonts)

Refactor editor core systems to standardize UI architecture and improve performance.

Assets & Properties:
- Replace monolithic property items with composable `Section` architecture.
- Add specialized sections for Transform, Blending, and Text.
- Implement `NumberField` with scrubbing and math evaluation.
- Add new ColorPicker with EyeDropper and multiple format support.
- Standardize asset panels using new `PanelView` layout.

Fonts & Stickers:
- Implement custom font atlas/sprite system for high-performance previews.
- Add virtualized FontPicker with search and favorites.
- Refactor stickers to use a provider-based architecture (icons, emoji, flags, shapes).
- Standardize sticker IDs to `provider:value` format.

Timeline & Interaction:
- Convert bookmarks to rich objects with notes, colors, and duration.
- Refactor drag-and-drop to use Command pattern (enabling proper undo/redo).
- Add Shift modifier to disable snapping during moves/resizes.
- Add new overlays for layout guides and text editing.

Renderer:
- Add support for multi-line text, custom line-height, and letter-spacing.
- Implement global composite operation (blend modes).
- Update sticker node to resolve dynamic provider IDs.

Infrastructure:
- Add storage migrations (v3->v6) for text weights, sticker IDs, and bookmarks.
- Update global styles and core UI components (Button, Input, Popover).

* add ts-nocheck directive to settings-legacy.tsx to suppress TypeScript errors

* fix: correct global composite operation assignment in TextNode to ensure proper blend mode handling

* deleted shadcn components with errors

* formatting

* fix linter issues

* migrate from next middleware to proxy

* add missing component back

* add breadcrumb back

* chore: add @radix-ui/react-primitive deps

* chore: more deps

* chore: add missing env vars to bun-ci

* next env

19 files changed, 1140 insertions, 29 deletions

diff --git a/apps/web/src/services/renderer/nodes/sticker-node.ts b/apps/web/src/services/renderer/nodes/sticker-node.ts
index 9842320e..a2fb0170 100644
--- a/apps/web/src/services/renderer/nodes/sticker-node.ts
+++ b/apps/web/src/services/renderer/nodes/sticker-node.ts
@@ -1,9 +1,9 @@
 import type { CanvasRenderer } from "../canvas-renderer";
+import { resolveStickerId } from "@/lib/stickers";
 import { VisualNode, type VisualNodeParams } from "./visual-node";
 
 export interface StickerNodeParams extends VisualNodeParams {
-	iconName: string;
-	color?: string;
+	stickerId: string;
 }
 
 export class StickerNode extends VisualNode<StickerNodeParams> {
@@ -18,15 +18,15 @@ export class StickerNode extends VisualNode<StickerNodeParams> {
 	private async load() {
 		const image = new Image();
 		this.image = image;
-		const color = this.params.color
-			? `&color=${encodeURIComponent(this.params.color)}`
-			: "";
-		const url = `https://api.iconify.design/${this.params.iconName}.svg?width=200&height=200${color}`;
+		const url = resolveStickerId({
+			stickerId: this.params.stickerId,
+			options: { width: 200, height: 200 },
+		});
 
 		await new Promise<void>((resolve, reject) => {
 			image.onload = () => resolve();
 			image.onerror = () =>
-				reject(new Error(`Failed to load sticker: ${this.params.iconName}`));
+				reject(new Error(`Failed to load sticker: ${this.params.stickerId}`));
 			image.src = url;
 		});
 	}
diff --git a/apps/web/src/services/renderer/nodes/text-node.ts b/apps/web/src/services/renderer/nodes/text-node.ts
index 121ba834..b7e36d64 100644
--- a/apps/web/src/services/renderer/nodes/text-node.ts
+++ b/apps/web/src/services/renderer/nodes/text-node.ts
@@ -1,7 +1,10 @@
 import type { CanvasRenderer } from "../canvas-renderer";
 import { BaseNode } from "./base-node";
 import type { TextElement } from "@/types/timeline";
-import { FONT_SIZE_SCALE_REFERENCE } from "@/constants/text-constants";
+import {
+	DEFAULT_LINE_HEIGHT,
+	FONT_SIZE_SCALE_REFERENCE,
+} from "@/constants/text-constants";
 
 function scaleFontSize({
 	fontSize,
@@ -13,6 +16,107 @@ function scaleFontSize({
 	return fontSize * (canvasHeight / FONT_SIZE_SCALE_REFERENCE);
 }
 
+function quoteFontFamily({ fontFamily }: { fontFamily: string }): string {
+	return `"${fontFamily.replace(/"/g, '\\"')}"`;
+}
+
+function getMetricAscent({
+	metrics,
+	fallback,
+}: {
+	metrics: TextMetrics;
+	fallback: number;
+}): number {
+	return metrics.actualBoundingBoxAscent ?? fallback * 0.8;
+}
+
+function getMetricDescent({
+	metrics,
+	fallback,
+}: {
+	metrics: TextMetrics;
+	fallback: number;
+}): number {
+	return metrics.actualBoundingBoxDescent ?? fallback * 0.2;
+}
+
+interface TextBlockMeasurement {
+	visualCenterOffset: number;
+	height: number;
+	maxWidth: number;
+}
+
+function measureTextBlock({
+	lineMetrics,
+	lineHeightPx,
+	fallbackFontSize,
+}: {
+	lineMetrics: TextMetrics[];
+	lineHeightPx: number;
+	fallbackFontSize: number;
+}): TextBlockMeasurement {
+	let top = Number.POSITIVE_INFINITY;
+	let bottom = Number.NEGATIVE_INFINITY;
+	let maxWidth = 0;
+
+	for (let i = 0; i < lineMetrics.length; i++) {
+		const metrics = lineMetrics[i];
+		const y = i * lineHeightPx;
+		top = Math.min(
+			top,
+			y - getMetricAscent({ metrics, fallback: fallbackFontSize }),
+		);
+		bottom = Math.max(
+			bottom,
+			y + getMetricDescent({ metrics, fallback: fallbackFontSize }),
+		);
+		maxWidth = Math.max(maxWidth, metrics.width);
+	}
+
+	const height = bottom - top;
+	const visualCenterOffset = (top + bottom) / 2;
+
+	return { visualCenterOffset, height, maxWidth };
+}
+
+function drawTextDecoration({
+	ctx,
+	textDecoration,
+	lineWidth,
+	lineY,
+	metrics,
+	scaledFontSize,
+	textAlign,
+}: {
+	ctx: CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;
+	textDecoration: string;
+	lineWidth: number;
+	lineY: number;
+	metrics: TextMetrics;
+	scaledFontSize: number;
+	textAlign: CanvasTextAlign;
+}): void {
+	if (textDecoration === "none" || !textDecoration) return;
+
+	const thickness = Math.max(1, scaledFontSize * 0.07);
+	const ascent = getMetricAscent({ metrics, fallback: scaledFontSize });
+	const descent = getMetricDescent({ metrics, fallback: scaledFontSize });
+
+	let xStart = -lineWidth / 2;
+	if (textAlign === "left") xStart = 0;
+	if (textAlign === "right") xStart = -lineWidth;
+
+	if (textDecoration === "underline") {
+		const underlineY = lineY + descent + thickness;
+		ctx.fillRect(xStart, underlineY, lineWidth, thickness);
+	}
+
+	if (textDecoration === "line-through") {
+		const strikeY = lineY - (ascent - descent) * 0.35;
+		ctx.fillRect(xStart, strikeY, lineWidth, thickness);
+	}
+}
+
 export type TextNodeParams = TextElement & {
 	canvasCenter: { x: number; y: number };
 	canvasHeight: number;
@@ -38,6 +142,10 @@ export class TextNode extends BaseNode<TextNodeParams> {
 		const y = this.params.transform.position.y + this.params.canvasCenter.y;
 
 		renderer.context.translate(x, y);
+		renderer.context.scale(
+			this.params.transform.scale,
+			this.params.transform.scale,
+		);
 		if (this.params.transform.rotate) {
 			renderer.context.rotate((this.params.transform.rotate * Math.PI) / 180);
 		}
@@ -48,39 +156,72 @@ export class TextNode extends BaseNode<TextNodeParams> {
 			fontSize: this.params.fontSize,
 			canvasHeight: this.params.canvasHeight,
 		});
-		renderer.context.font = `${fontStyle} ${fontWeight} ${scaledFontSize}px ${this.params.fontFamily}`;
+		const fontFamily = quoteFontFamily({ fontFamily: this.params.fontFamily });
+		renderer.context.font = `${fontStyle} ${fontWeight} ${scaledFontSize}px ${fontFamily}, sans-serif`;
 		renderer.context.textAlign = this.params.textAlign;
-		renderer.context.textBaseline = this.params.textBaseline || "middle";
 		renderer.context.fillStyle = this.params.color;
 
+		const letterSpacing = this.params.letterSpacing ?? 0;
+		const lineHeight = this.params.lineHeight ?? DEFAULT_LINE_HEIGHT;
+		if ("letterSpacing" in renderer.context) {
+			(
+				renderer.context as CanvasRenderingContext2D & { letterSpacing: string }
+			).letterSpacing = `${letterSpacing}px`;
+		}
+
+		const lines = this.params.content.split("\n");
+		const lineHeightPx = scaledFontSize * lineHeight;
+		const baseline = this.params.textBaseline ?? "middle";
+
+		renderer.context.textBaseline = baseline;
+		const lineMetrics = lines.map((line) => renderer.context.measureText(line));
+		const lineCount = lines.length;
+
+		const block = measureTextBlock({
+			lineMetrics,
+			lineHeightPx,
+			fallbackFontSize: scaledFontSize,
+		});
+
 		const prevAlpha = renderer.context.globalAlpha;
+		renderer.context.globalCompositeOperation = (
+			this.params.blendMode && this.params.blendMode !== "normal"
+				? this.params.blendMode
+				: "source-over"
+		) as GlobalCompositeOperation;
 		renderer.context.globalAlpha = this.params.opacity;
 
-		if (this.params.backgroundColor) {
-			const metrics = renderer.context.measureText(this.params.content);
-			const ascent = metrics.actualBoundingBoxAscent ?? scaledFontSize * 0.8;
-			const descent = metrics.actualBoundingBoxDescent ?? scaledFontSize * 0.2;
-			const textW = metrics.width;
-			const textH = ascent + descent;
+		if (this.params.backgroundColor && lineCount > 0) {
 			const padX = 8;
 			const padY = 4;
-
 			renderer.context.fillStyle = this.params.backgroundColor;
-			let bgLeft = -textW / 2;
+			let bgLeft = -block.maxWidth / 2;
 			if (renderer.context.textAlign === "left") bgLeft = 0;
-			if (renderer.context.textAlign === "right") bgLeft = -textW;
+			if (renderer.context.textAlign === "right") bgLeft = -block.maxWidth;
 
 			renderer.context.fillRect(
 				bgLeft - padX,
-				-textH / 2 - padY,
-				textW + padX * 2,
-				textH + padY * 2,
+				-block.height / 2 - padY,
+				block.maxWidth + padX * 2,
+				block.height + padY * 2,
 			);
 
 			renderer.context.fillStyle = this.params.color;
 		}
 
-		renderer.context.fillText(this.params.content, 0, 0);
+		for (let i = 0; i < lineCount; i++) {
+			const y = i * lineHeightPx - block.visualCenterOffset;
+			renderer.context.fillText(lines[i], 0, y);
+			drawTextDecoration({
+				ctx: renderer.context,
+				textDecoration: this.params.textDecoration ?? "none",
+				lineWidth: lineMetrics[i].width,
+				lineY: y,
+				metrics: lineMetrics[i],
+				scaledFontSize,
+				textAlign: this.params.textAlign,
+			});
+		}
 
 		renderer.context.globalAlpha = prevAlpha;
 		renderer.context.restore();
diff --git a/apps/web/src/services/renderer/nodes/visual-node.ts b/apps/web/src/services/renderer/nodes/visual-node.ts
index 9c6c88ca..7179369e 100644
--- a/apps/web/src/services/renderer/nodes/visual-node.ts
+++ b/apps/web/src/services/renderer/nodes/visual-node.ts
@@ -1,5 +1,6 @@
 import type { CanvasRenderer } from "../canvas-renderer";
 import { BaseNode } from "./base-node";
+import type { BlendMode } from "@/types/rendering";
 import type { Transform } from "@/types/timeline";
 
 const VISUAL_EPSILON = 1 / 1000;
@@ -11,6 +12,7 @@ export interface VisualNodeParams {
 	trimEnd: number;
 	transform: Transform;
 	opacity: number;
+	blendMode?: BlendMode;
 }
 
 export abstract class VisualNode<
@@ -51,6 +53,11 @@ export abstract class VisualNode<
 		const x = renderer.width / 2 + transform.position.x - scaledWidth / 2;
 		const y = renderer.height / 2 + transform.position.y - scaledHeight / 2;
 
+		renderer.context.globalCompositeOperation = (
+			this.params.blendMode && this.params.blendMode !== "normal"
+				? this.params.blendMode
+				: "source-over"
+		) as GlobalCompositeOperation;
 		renderer.context.globalAlpha = opacity;
 
 		if (transform.rotate !== 0) {
diff --git a/apps/web/src/services/renderer/scene-builder.ts b/apps/web/src/services/renderer/scene-builder.ts
index d1b8217e..ee7f3d6c 100644
--- a/apps/web/src/services/renderer/scene-builder.ts
+++ b/apps/web/src/services/renderer/scene-builder.ts
@@ -66,6 +66,7 @@ export function buildScene(params: BuildSceneParams) {
 							trimEnd: element.trimEnd,
 							transform: element.transform,
 							opacity: element.opacity,
+							blendMode: element.blendMode,
 						}),
 					);
 				}
@@ -79,6 +80,7 @@ export function buildScene(params: BuildSceneParams) {
 							trimEnd: element.trimEnd,
 							transform: element.transform,
 							opacity: element.opacity,
+							blendMode: element.blendMode,
 						}),
 					);
 				}
@@ -98,14 +100,14 @@ export function buildScene(params: BuildSceneParams) {
 			if (element.type === "sticker") {
 				contentNodes.push(
 					new StickerNode({
-						iconName: element.iconName,
+						stickerId: element.stickerId,
 						duration: element.duration,
 						timeOffset: element.startTime,
 						trimStart: element.trimStart,
 						trimEnd: element.trimEnd,
 						transform: element.transform,
 						opacity: element.opacity,
-						color: element.color,
+						blendMode: element.blendMode,
 					}),
 				);
 			}
diff --git a/apps/web/src/services/storage/migrations/__tests__/fixtures/index.ts b/apps/web/src/services/storage/migrations/__tests__/fixtures/index.ts
index ee1485ba..5f82e14a 100644
--- a/apps/web/src/services/storage/migrations/__tests__/fixtures/index.ts
+++ b/apps/web/src/services/storage/migrations/__tests__/fixtures/index.ts
@@ -7,3 +7,4 @@ export * from "./v0";
 export * from "./v1";
 export * from "./v2";
 export * from "./v3";
+export * from "./v5";
diff --git a/apps/web/src/services/storage/migrations/__tests__/fixtures/v5.ts b/apps/web/src/services/storage/migrations/__tests__/fixtures/v5.ts
new file mode 100644
index 00000000..5e181c76
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/__tests__/fixtures/v5.ts
@@ -0,0 +1,54 @@
+export const v5Project = {
+	id: "project-v5-456",
+	version: 5,
+	metadata: {
+		id: "project-v5-456",
+		name: "My V5 Project",
+		thumbnail: "data:image/png;base64,abc123",
+		duration: 30,
+		createdAt: "2024-06-01T10:00:00.000Z",
+		updatedAt: "2024-06-01T14:00:00.000Z",
+	},
+	settings: {
+		fps: 30,
+		canvasSize: { width: 1920, height: 1080 },
+		background: { type: "color", color: "#000000" },
+	},
+	currentSceneId: "scene-main",
+	scenes: [
+		{
+			id: "scene-main",
+			name: "Main scene",
+			isMain: true,
+			tracks: [
+				{
+					id: "track-1",
+					type: "video",
+					name: "Video Track",
+					isMain: true,
+					elements: [],
+				},
+			],
+			bookmarks: [2.0, 5.5, 12.0],
+			createdAt: "2024-06-01T10:00:00.000Z",
+			updatedAt: "2024-06-01T14:00:00.000Z",
+		},
+		{
+			id: "scene-intro",
+			name: "Intro",
+			isMain: false,
+			tracks: [
+				{
+					id: "track-2",
+					type: "video",
+					name: "Video Track",
+					isMain: true,
+					elements: [],
+				},
+			],
+			bookmarks: [],
+			createdAt: "2024-06-01T10:00:00.000Z",
+			updatedAt: "2024-06-01T14:00:00.000Z",
+		},
+	],
+};
diff --git a/apps/web/src/services/storage/migrations/__tests__/v3-to-v4.test.ts b/apps/web/src/services/storage/migrations/__tests__/v3-to-v4.test.ts
new file mode 100644
index 00000000..81d03147
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/__tests__/v3-to-v4.test.ts
@@ -0,0 +1,140 @@
+import { describe, expect, test } from "bun:test";
+import { transformProjectV3ToV4 } from "../transformers/v3-to-v4";
+import { v3Project } from "./fixtures";
+
+describe("V3 to V4 Migration", () => {
+	test("normalizes legacy text fontWeight values", () => {
+		const projectWithLegacyTextWeight = {
+			...v3Project,
+			scenes: [
+				{
+					...v3Project.scenes[0],
+					tracks: [
+						{
+							id: "track-text",
+							type: "text",
+							name: "Text Track",
+							hidden: false,
+							elements: [
+								{
+									id: "text-1",
+									type: "text",
+									name: "Title",
+									content: "Hello",
+									duration: 5,
+									startTime: 0,
+									trimStart: 0,
+									trimEnd: 0,
+									fontSize: 64,
+									fontFamily: "Inter",
+									color: "#ffffff",
+									backgroundColor: "transparent",
+									textAlign: "center",
+									fontWeight: "bold",
+									fontStyle: "normal",
+									textDecoration: "none",
+									transform: {
+										scale: 1,
+										position: { x: 0, y: 0 },
+										rotate: 0,
+									},
+									opacity: 1,
+								},
+							],
+						},
+					],
+				},
+			],
+		};
+
+		const result = transformProjectV3ToV4({
+			project: projectWithLegacyTextWeight,
+		});
+
+		expect(result.skipped).toBe(false);
+		expect(result.project.version).toBe(4);
+
+		const migratedScene = (
+			result.project.scenes as Array<Record<string, unknown>>
+		)[0];
+		const migratedTrack = (
+			migratedScene.tracks as Array<Record<string, unknown>>
+		)[0];
+		const migratedElement = (
+			migratedTrack.elements as Array<Record<string, unknown>>
+		)[0];
+
+		expect(migratedElement.fontWeight).toBe("700");
+	});
+
+	test("does not mutate non-text tracks", () => {
+		const projectWithoutTextTrack = {
+			...v3Project,
+			scenes: [
+				{
+					...v3Project.scenes[0],
+					tracks: [
+						{
+							id: "track-sticker",
+							type: "sticker",
+							name: "Sticker Track",
+							hidden: false,
+							elements: [
+								{
+									id: "sticker-1",
+									type: "sticker",
+									name: "Flag",
+									iconName: "mdi:home",
+									duration: 5,
+									startTime: 0,
+									trimStart: 0,
+									trimEnd: 0,
+									transform: {
+										scale: 1,
+										position: { x: 0, y: 0 },
+										rotate: 0,
+									},
+									opacity: 1,
+								},
+							],
+						},
+					],
+				},
+			],
+		};
+
+		const result = transformProjectV3ToV4({ project: projectWithoutTextTrack });
+		const migratedScene = (
+			result.project.scenes as Array<Record<string, unknown>>
+		)[0];
+		const migratedTrack = (
+			migratedScene.tracks as Array<Record<string, unknown>>
+		)[0];
+		const migratedElement = (
+			migratedTrack.elements as Array<Record<string, unknown>>
+		)[0];
+
+		expect(migratedElement.iconName).toBe("mdi:home");
+	});
+
+	test("skips projects that are already v4", () => {
+		const result = transformProjectV3ToV4({
+			project: { ...v3Project, version: 4 },
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("already v4");
+	});
+
+	test("skips projects with no id", () => {
+		const result = transformProjectV3ToV4({
+			project: {
+				version: 3,
+				scenes: [],
+			},
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("no project id");
+	});
+});
diff --git a/apps/web/src/services/storage/migrations/__tests__/v4-to-v5.test.ts b/apps/web/src/services/storage/migrations/__tests__/v4-to-v5.test.ts
new file mode 100644
index 00000000..ce0c3019
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/__tests__/v4-to-v5.test.ts
@@ -0,0 +1,137 @@
+import { describe, expect, test } from "bun:test";
+import { transformProjectV4ToV5 } from "../transformers/v4-to-v5";
+import { v3Project } from "./fixtures";
+
+describe("V4 to V5 Migration", () => {
+	test("migrates sticker iconName to stickerId and removes legacy color", () => {
+		const projectWithLegacySticker = {
+			...v3Project,
+			version: 4,
+			scenes: [
+				{
+					...v3Project.scenes[0],
+					tracks: [
+						{
+							id: "track-sticker",
+							type: "sticker",
+							name: "Sticker Track",
+							hidden: false,
+							elements: [
+								{
+									id: "sticker-1",
+									type: "sticker",
+									name: "Home",
+									iconName: "mdi:home",
+									color: "#ff0000",
+									duration: 5,
+									startTime: 0,
+									trimStart: 0,
+									trimEnd: 0,
+									transform: {
+										scale: 1,
+										position: { x: 0, y: 0 },
+										rotate: 0,
+									},
+									opacity: 1,
+								},
+							],
+						},
+					],
+				},
+			],
+		};
+
+		const result = transformProjectV4ToV5({
+			project: projectWithLegacySticker,
+		});
+
+		expect(result.skipped).toBe(false);
+		expect(result.project.version).toBe(5);
+
+		const migratedScene = (
+			result.project.scenes as Array<Record<string, unknown>>
+		)[0];
+		const migratedTrack = (
+			migratedScene.tracks as Array<Record<string, unknown>>
+		)[0];
+		const migratedElement = (
+			migratedTrack.elements as Array<Record<string, unknown>>
+		)[0];
+
+		expect(migratedElement.stickerId).toBe("icons:mdi:home");
+		expect("iconName" in migratedElement).toBe(false);
+		expect("color" in migratedElement).toBe(false);
+	});
+
+	test("keeps provider-prefixed stickerId values unchanged", () => {
+		const projectWithStickerId = {
+			...v3Project,
+			version: 4,
+			scenes: [
+				{
+					...v3Project.scenes[0],
+					tracks: [
+						{
+							id: "track-sticker",
+							type: "sticker",
+							name: "Sticker Track",
+							hidden: false,
+							elements: [
+								{
+									id: "sticker-1",
+									type: "sticker",
+									name: "Flag",
+									stickerId: "flags:AD",
+									duration: 5,
+									startTime: 0,
+									trimStart: 0,
+									trimEnd: 0,
+									transform: {
+										scale: 1,
+										position: { x: 0, y: 0 },
+										rotate: 0,
+									},
+									opacity: 1,
+								},
+							],
+						},
+					],
+				},
+			],
+		};
+
+		const result = transformProjectV4ToV5({ project: projectWithStickerId });
+		const migratedScene = (
+			result.project.scenes as Array<Record<string, unknown>>
+		)[0];
+		const migratedTrack = (
+			migratedScene.tracks as Array<Record<string, unknown>>
+		)[0];
+		const migratedElement = (
+			migratedTrack.elements as Array<Record<string, unknown>>
+		)[0];
+
+		expect(migratedElement.stickerId).toBe("flags:AD");
+	});
+
+	test("skips projects that are already v5", () => {
+		const result = transformProjectV4ToV5({
+			project: { ...v3Project, version: 5 },
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("already v5");
+	});
+
+	test("skips projects with no id", () => {
+		const result = transformProjectV4ToV5({
+			project: {
+				version: 4,
+				scenes: [],
+			},
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("no project id");
+	});
+});
diff --git a/apps/web/src/services/storage/migrations/__tests__/v5-to-v6.test.ts b/apps/web/src/services/storage/migrations/__tests__/v5-to-v6.test.ts
new file mode 100644
index 00000000..6bbd5634
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/__tests__/v5-to-v6.test.ts
@@ -0,0 +1,92 @@
+import { describe, expect, test } from "bun:test";
+import { transformProjectV5ToV6 } from "../transformers/v5-to-v6";
+import { v5Project } from "./fixtures";
+
+describe("V5 to V6 Migration", () => {
+	test("converts number bookmarks to Bookmark objects", async () => {
+		const result = transformProjectV5ToV6({
+			project: v5Project as Parameters<
+				typeof transformProjectV5ToV6
+			>[0]["project"],
+		});
+
+		expect(result.skipped).toBe(false);
+		expect(result.project.version).toBe(6);
+
+		const mainScene = (
+			result.project.scenes as Array<{ bookmarks: unknown[] }>
+		)[0];
+		expect(mainScene.bookmarks).toEqual([
+			{ time: 2.0 },
+			{ time: 5.5 },
+			{ time: 12.0 },
+		]);
+
+		const introScene = (
+			result.project.scenes as Array<{ bookmarks: unknown[] }>
+		)[1];
+		expect(introScene.bookmarks).toEqual([]);
+	});
+
+	test("skips projects that are already v6", () => {
+		const result = transformProjectV5ToV6({
+			project: {
+				...v5Project,
+				version: 6,
+				scenes: [
+					{
+						...(v5Project as { scenes: unknown[] }).scenes[0],
+						bookmarks: [{ time: 2 }, { time: 5 }],
+					},
+				],
+			} as Parameters<typeof transformProjectV5ToV6>[0]["project"],
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("already v6");
+	});
+
+	test("skips projects with no id", () => {
+		const result = transformProjectV5ToV6({
+			project: {
+				version: 5,
+				scenes: [],
+			} as Parameters<typeof transformProjectV5ToV6>[0]["project"],
+		});
+
+		expect(result.skipped).toBe(true);
+		expect(result.reason).toBe("no project id");
+	});
+
+	test("preserves existing Bookmark objects with note, color, duration", () => {
+		const projectWithRichBookmarks = {
+			...v5Project,
+			version: 5,
+			scenes: [
+				{
+					...(v5Project as { scenes: Array<Record<string, unknown>> })
+						.scenes[0],
+					bookmarks: [
+						{ time: 1, note: "Intro", color: "#ef4444" },
+						{ time: 5.5, duration: 2 },
+					],
+				},
+			],
+		};
+
+		const result = transformProjectV5ToV6({
+			project: projectWithRichBookmarks as Parameters<
+				typeof transformProjectV5ToV6
+			>[0]["project"],
+		});
+
+		expect(result.skipped).toBe(false);
+		const mainScene = (
+			result.project.scenes as Array<{ bookmarks: unknown[] }>
+		)[0];
+		expect(mainScene.bookmarks).toEqual([
+			{ time: 1, note: "Intro", color: "#ef4444" },
+			{ time: 5.5, duration: 2 },
+		]);
+	});
+});
diff --git a/apps/web/src/services/storage/migrations/index.ts b/apps/web/src/services/storage/migrations/index.ts
index df0b8007..00c009c7 100644
--- a/apps/web/src/services/storage/migrations/index.ts
+++ b/apps/web/src/services/storage/migrations/index.ts
@@ -2,13 +2,19 @@ export { StorageMigration } from "./base";
 import { V0toV1Migration } from "./v0-to-v1";
 import { V1toV2Migration } from "./v1-to-v2";
 import { V2toV3Migration } from "./v2-to-v3";
+import { V3toV4Migration } from "./v3-to-v4";
+import { V4toV5Migration } from "./v4-to-v5";
+import { V5toV6Migration } from "./v5-to-v6";
 export { runStorageMigrations } from "./runner";
 export type { MigrationProgress } from "./runner";
 
-export const CURRENT_PROJECT_VERSION = 3;
+export const CURRENT_PROJECT_VERSION = 6;
 
 export const migrations = [
 	new V0toV1Migration(),
 	new V1toV2Migration(),
 	new V2toV3Migration(),
+	new V3toV4Migration(),
+	new V4toV5Migration(),
+	new V5toV6Migration(),
 ];
diff --git a/apps/web/src/services/storage/migrations/runner.ts b/apps/web/src/services/storage/migrations/runner.ts
index b261252b..e1c2d09a 100644
--- a/apps/web/src/services/storage/migrations/runner.ts
+++ b/apps/web/src/services/storage/migrations/runner.ts
@@ -136,7 +136,11 @@ function getProjectVersion({ project }: { project: ProjectRecord }): number {
 	return 0;
 }
 
-function getProjectName({ project }: { project: ProjectRecord }): string | null {
+function getProjectName({
+	project,
+}: {
+	project: ProjectRecord;
+}): string | null {
 	const metadata = project.metadata;
 	if (isRecord(metadata) && typeof metadata.name === "string") {
 		return metadata.name;
diff --git a/apps/web/src/services/storage/migrations/transformers/index.ts b/apps/web/src/services/storage/migrations/transformers/index.ts
index 74cf46a9..8878d6ba 100644
--- a/apps/web/src/services/storage/migrations/transformers/index.ts
+++ b/apps/web/src/services/storage/migrations/transformers/index.ts
@@ -1,4 +1,6 @@
 export { transformProjectV0ToV1 } from "./v0-to-v1";
 export { transformProjectV1ToV2 } from "./v1-to-v2";
 export { transformProjectV2ToV3 } from "./v2-to-v3";
+export { transformProjectV3ToV4 } from "./v3-to-v4";
+export { transformProjectV4ToV5 } from "./v4-to-v5";
 export type { MigrationResult, ProjectRecord } from "./types";
diff --git a/apps/web/src/services/storage/migrations/transformers/v3-to-v4.ts b/apps/web/src/services/storage/migrations/transformers/v3-to-v4.ts
new file mode 100644
index 00000000..d6e1efee
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/transformers/v3-to-v4.ts
@@ -0,0 +1,189 @@
+import type { MigrationResult, ProjectRecord } from "./types";
+import { getProjectId, isRecord } from "./utils";
+
+const LEGACY_FONT_WEIGHT_MAP = {
+	normal: "400",
+	bold: "700",
+} as const;
+
+const VALID_NUMERIC_FONT_WEIGHTS = new Set([
+	"100",
+	"200",
+	"300",
+	"400",
+	"500",
+	"600",
+	"700",
+	"800",
+	"900",
+]);
+
+export function transformProjectV3ToV4({
+	project,
+}: {
+	project: ProjectRecord;
+}): MigrationResult<ProjectRecord> {
+	const projectId = getProjectId({ project });
+	if (!projectId) {
+		return { project, skipped: true, reason: "no project id" };
+	}
+
+	if (isV4Project({ project })) {
+		return { project, skipped: true, reason: "already v4" };
+	}
+
+	const migratedProject = normalizeProjectTextFontWeights({ project });
+
+	return {
+		project: {
+			...migratedProject,
+			version: 4,
+		},
+		skipped: false,
+	};
+}
+
+function normalizeProjectTextFontWeights({
+	project,
+}: {
+	project: ProjectRecord;
+}): ProjectRecord {
+	const scenesValue = project.scenes;
+	if (!Array.isArray(scenesValue)) {
+		return project;
+	}
+
+	let hasSceneChanges = false;
+	const normalizedScenes = scenesValue.map((scene) => {
+		const normalizedScene = normalizeSceneTextFontWeights({ scene });
+		if (normalizedScene !== scene) {
+			hasSceneChanges = true;
+		}
+		return normalizedScene;
+	});
+
+	if (!hasSceneChanges) {
+		return project;
+	}
+
+	return {
+		...project,
+		scenes: normalizedScenes,
+	};
+}
+
+function normalizeSceneTextFontWeights({ scene }: { scene: unknown }): unknown {
+	if (!isRecord(scene)) {
+		return scene;
+	}
+
+	const tracksValue = scene.tracks;
+	if (!Array.isArray(tracksValue)) {
+		return scene;
+	}
+
+	let hasTrackChanges = false;
+	const normalizedTracks = tracksValue.map((track) => {
+		const normalizedTrack = normalizeTrackTextFontWeights({ track });
+		if (normalizedTrack !== track) {
+			hasTrackChanges = true;
+		}
+		return normalizedTrack;
+	});
+
+	if (!hasTrackChanges) {
+		return scene;
+	}
+
+	return {
+		...scene,
+		tracks: normalizedTracks,
+	};
+}
+
+function normalizeTrackTextFontWeights({ track }: { track: unknown }): unknown {
+	if (!isRecord(track)) {
+		return track;
+	}
+
+	if (track.type !== "text") {
+		return track;
+	}
+
+	const elementsValue = track.elements;
+	if (!Array.isArray(elementsValue)) {
+		return track;
+	}
+
+	let hasElementChanges = false;
+	const normalizedElements = elementsValue.map((element) => {
+		const normalizedElement = normalizeTextElementFontWeight({ element });
+		if (normalizedElement !== element) {
+			hasElementChanges = true;
+		}
+		return normalizedElement;
+	});
+
+	if (!hasElementChanges) {
+		return track;
+	}
+
+	return {
+		...track,
+		elements: normalizedElements,
+	};
+}
+
+function normalizeTextElementFontWeight({
+	element,
+}: {
+	element: unknown;
+}): unknown {
+	if (!isRecord(element) || element.type !== "text") {
+		return element;
+	}
+
+	const normalizedWeight = normalizeFontWeight({ value: element.fontWeight });
+	if (normalizedWeight === element.fontWeight) {
+		return element;
+	}
+
+	return {
+		...element,
+		fontWeight: normalizedWeight,
+	};
+}
+
+function normalizeFontWeight({ value }: { value: unknown }): unknown {
+	if (typeof value === "number") {
+		const numericWeight = String(value);
+		if (VALID_NUMERIC_FONT_WEIGHTS.has(numericWeight)) {
+			return numericWeight;
+		}
+		return value;
+	}
+
+	if (typeof value !== "string") {
+		return value;
+	}
+
+	const normalized = value.trim().toLowerCase();
+	if (normalized in LEGACY_FONT_WEIGHT_MAP) {
+		return LEGACY_FONT_WEIGHT_MAP[
+			normalized as keyof typeof LEGACY_FONT_WEIGHT_MAP
+		];
+	}
+
+	if (VALID_NUMERIC_FONT_WEIGHTS.has(normalized)) {
+		return normalized;
+	}
+
+	return value;
+}
+
+export { getProjectId } from "./utils";
+
+function isV4Project({ project }: { project: ProjectRecord }): boolean {
+	const versionValue = project.version;
+	return typeof versionValue === "number" && versionValue >= 4;
+}
diff --git a/apps/web/src/services/storage/migrations/transformers/v4-to-v5.ts b/apps/web/src/services/storage/migrations/transformers/v4-to-v5.ts
new file mode 100644
index 00000000..971e3510
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/transformers/v4-to-v5.ts
@@ -0,0 +1,177 @@
+import type { MigrationResult, ProjectRecord } from "./types";
+import { getProjectId, isRecord } from "./utils";
+
+const KNOWN_STICKER_PROVIDER_IDS = new Set([
+	"icons",
+	"emoji",
+	"flags",
+	"shapes",
+]);
+
+export function transformProjectV4ToV5({
+	project,
+}: {
+	project: ProjectRecord;
+}): MigrationResult<ProjectRecord> {
+	const projectId = getProjectId({ project });
+	if (!projectId) {
+		return { project, skipped: true, reason: "no project id" };
+	}
+
+	if (isV5Project({ project })) {
+		return { project, skipped: true, reason: "already v5" };
+	}
+
+	const migratedProject = migrateProjectStickerElements({ project });
+
+	return {
+		project: {
+			...migratedProject,
+			version: 5,
+		},
+		skipped: false,
+	};
+}
+
+function migrateProjectStickerElements({
+	project,
+}: {
+	project: ProjectRecord;
+}): ProjectRecord {
+	const scenesValue = project.scenes;
+	if (!Array.isArray(scenesValue)) {
+		return project;
+	}
+
+	let hasSceneChanges = false;
+	const migratedScenes = scenesValue.map((scene) => {
+		const migratedScene = migrateSceneStickerElements({ scene });
+		if (migratedScene !== scene) {
+			hasSceneChanges = true;
+		}
+		return migratedScene;
+	});
+
+	if (!hasSceneChanges) {
+		return project;
+	}
+
+	return {
+		...project,
+		scenes: migratedScenes,
+	};
+}
+
+function migrateSceneStickerElements({ scene }: { scene: unknown }): unknown {
+	if (!isRecord(scene)) {
+		return scene;
+	}
+
+	const tracksValue = scene.tracks;
+	if (!Array.isArray(tracksValue)) {
+		return scene;
+	}
+
+	let hasTrackChanges = false;
+	const migratedTracks = tracksValue.map((track) => {
+		const migratedTrack = migrateTrackStickerElements({ track });
+		if (migratedTrack !== track) {
+			hasTrackChanges = true;
+		}
+		return migratedTrack;
+	});
+
+	if (!hasTrackChanges) {
+		return scene;
+	}
+
+	return {
+		...scene,
+		tracks: migratedTracks,
+	};
+}
+
+function migrateTrackStickerElements({ track }: { track: unknown }): unknown {
+	if (!isRecord(track)) {
+		return track;
+	}
+
+	const elementsValue = track.elements;
+	if (!Array.isArray(elementsValue)) {
+		return track;
+	}
+
+	let hasElementChanges = false;
+	const migratedElements = elementsValue.map((element) => {
+		const migratedElement = migrateStickerElement({ element });
+		if (migratedElement !== element) {
+			hasElementChanges = true;
+		}
+		return migratedElement;
+	});
+
+	if (!hasElementChanges) {
+		return track;
+	}
+
+	return {
+		...track,
+		elements: migratedElements,
+	};
+}
+
+function migrateStickerElement({ element }: { element: unknown }): unknown {
+	if (!isRecord(element) || element.type !== "sticker") {
+		return element;
+	}
+
+	const existingStickerId =
+		typeof element.stickerId === "string" ? element.stickerId : null;
+	const legacyIconName =
+		typeof element.iconName === "string" ? element.iconName : null;
+
+	const normalizedStickerId =
+		normalizeStickerId({
+			value: existingStickerId ?? legacyIconName,
+		}) ?? null;
+
+	const hasLegacyIconName = "iconName" in element;
+	const hasLegacyColor = "color" in element;
+	const shouldUpdateStickerId = normalizedStickerId !== existingStickerId;
+
+	if (!hasLegacyIconName && !hasLegacyColor && !shouldUpdateStickerId) {
+		return element;
+	}
+
+	const {
+		iconName: _legacyIconName,
+		color: _legacyColor,
+		...remaining
+	} = element;
+	return normalizedStickerId
+		? { ...remaining, stickerId: normalizedStickerId }
+		: remaining;
+}
+
+function normalizeStickerId({ value }: { value: unknown }): string | null {
+	if (typeof value !== "string" || value.length === 0) {
+		return null;
+	}
+
+	const separatorIndex = value.indexOf(":");
+	if (separatorIndex === -1) {
+		return `icons:${value}`;
+	}
+
+	const maybeProvider = value.slice(0, separatorIndex);
+	if (KNOWN_STICKER_PROVIDER_IDS.has(maybeProvider)) {
+		return value;
+	}
+
+	return `icons:${value}`;
+}
+
+function isV5Project({ project }: { project: ProjectRecord }): boolean {
+	const versionValue = project.version;
+	return typeof versionValue === "number" && versionValue >= 5;
+}
diff --git a/apps/web/src/services/storage/migrations/transformers/v5-to-v6.ts b/apps/web/src/services/storage/migrations/transformers/v5-to-v6.ts
new file mode 100644
index 00000000..ca855149
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/transformers/v5-to-v6.ts
@@ -0,0 +1,88 @@
+import type { MigrationResult, ProjectRecord } from "./types";
+import { getProjectId, isRecord } from "./utils";
+
+export function transformProjectV5ToV6({
+	project,
+}: {
+	project: ProjectRecord;
+}): MigrationResult<ProjectRecord> {
+	const projectId = getProjectId({ project });
+	if (!projectId) {
+		return { project, skipped: true, reason: "no project id" };
+	}
+
+	if (isV6Project({ project })) {
+		return { project, skipped: true, reason: "already v6" };
+	}
+
+	const migratedProject = migrateProjectBookmarks({ project });
+
+	return {
+		project: {
+			...migratedProject,
+			version: 6,
+		},
+		skipped: false,
+	};
+}
+
+function migrateProjectBookmarks({
+	project,
+}: {
+	project: ProjectRecord;
+}): ProjectRecord {
+	const scenesValue = project.scenes;
+	if (!Array.isArray(scenesValue)) {
+		return project;
+	}
+
+	let hasSceneChanges = false;
+	const migratedScenes = scenesValue.map((scene) => {
+		const migratedScene = migrateSceneBookmarks({ scene });
+		if (migratedScene !== scene) {
+			hasSceneChanges = true;
+		}
+		return migratedScene;
+	});
+
+	if (!hasSceneChanges) {
+		return project;
+	}
+
+	return {
+		...project,
+		scenes: migratedScenes,
+	};
+}
+
+function migrateSceneBookmarks({ scene }: { scene: unknown }): unknown {
+	if (!isRecord(scene)) {
+		return scene;
+	}
+
+	const bookmarksValue = scene.bookmarks;
+	if (!Array.isArray(bookmarksValue)) {
+		return scene;
+	}
+
+	const needsMigration = bookmarksValue.some(
+		(bookmark) => typeof bookmark === "number",
+	);
+	if (!needsMigration) {
+		return scene;
+	}
+
+	const migratedBookmarks = bookmarksValue.map((bookmark) =>
+		typeof bookmark === "number" ? { time: bookmark } : bookmark,
+	);
+
+	return {
+		...scene,
+		bookmarks: migratedBookmarks,
+	};
+}
+
+function isV6Project({ project }: { project: ProjectRecord }): boolean {
+	const versionValue = project.version;
+	return typeof versionValue === "number" && versionValue >= 6;
+}
diff --git a/apps/web/src/services/storage/migrations/v3-to-v4.ts b/apps/web/src/services/storage/migrations/v3-to-v4.ts
new file mode 100644
index 00000000..67b2fdf7
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/v3-to-v4.ts
@@ -0,0 +1,16 @@
+import { StorageMigration } from "./base";
+import type { ProjectRecord } from "./transformers/types";
+import { transformProjectV3ToV4 } from "./transformers/v3-to-v4";
+
+export class V3toV4Migration extends StorageMigration {
+	from = 3;
+	to = 4;
+
+	async transform(project: ProjectRecord): Promise<{
+		project: ProjectRecord;
+		skipped: boolean;
+		reason?: string;
+	}> {
+		return transformProjectV3ToV4({ project });
+	}
+}
diff --git a/apps/web/src/services/storage/migrations/v4-to-v5.ts b/apps/web/src/services/storage/migrations/v4-to-v5.ts
new file mode 100644
index 00000000..829a746d
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/v4-to-v5.ts
@@ -0,0 +1,16 @@
+import { StorageMigration } from "./base";
+import type { ProjectRecord } from "./transformers/types";
+import { transformProjectV4ToV5 } from "./transformers/v4-to-v5";
+
+export class V4toV5Migration extends StorageMigration {
+	from = 4;
+	to = 5;
+
+	async transform(project: ProjectRecord): Promise<{
+		project: ProjectRecord;
+		skipped: boolean;
+		reason?: string;
+	}> {
+		return transformProjectV4ToV5({ project });
+	}
+}
diff --git a/apps/web/src/services/storage/migrations/v5-to-v6.ts b/apps/web/src/services/storage/migrations/v5-to-v6.ts
new file mode 100644
index 00000000..b621bd72
--- /dev/null
+++ b/apps/web/src/services/storage/migrations/v5-to-v6.ts
@@ -0,0 +1,16 @@
+import { StorageMigration } from "./base";
+import type { ProjectRecord } from "./transformers/types";
+import { transformProjectV5ToV6 } from "./transformers/v5-to-v6";
+
+export class V5toV6Migration extends StorageMigration {
+	from = 5;
+	to = 6;
+
+	async transform(project: ProjectRecord): Promise<{
+		project: ProjectRecord;
+		skipped: boolean;
+		reason?: string;
+	}> {
+		return transformProjectV5ToV6({ project });
+	}
+}
diff --git a/apps/web/src/services/storage/service.ts b/apps/web/src/services/storage/service.ts
index 02f8d290..aac152da 100644
--- a/apps/web/src/services/storage/service.ts
+++ b/apps/web/src/services/storage/service.ts
@@ -14,7 +14,30 @@ import {
 	migrations,
 	runStorageMigrations,
 } from "@/services/storage/migrations";
-import type { TimelineTrack, TScene } from "@/types/timeline";
+import type { Bookmark, TimelineTrack, TScene } from "@/types/timeline";
+
+function normalizeBookmarks({ raw }: { raw: unknown }): Bookmark[] {
+	if (!Array.isArray(raw)) return [];
+	return raw
+		.map((item): Bookmark | null => {
+			if (typeof item === "number") return { time: item };
+			const obj = item as Record<string, unknown>;
+			if (
+				typeof obj !== "object" ||
+				obj === null ||
+				typeof obj.time !== "number"
+			) {
+				return null;
+			}
+			return {
+				time: obj.time,
+				...(typeof obj.note === "string" && { note: obj.note }),
+				...(typeof obj.color === "string" && { color: obj.color }),
+				...(typeof obj.duration === "number" && { duration: obj.duration }),
+			};
+		})
+		.filter((b): b is Bookmark => b !== null);
+}
 
 class StorageService {
 	private projectsAdapter: IndexedDBAdapter<SerializedProject>;
@@ -137,7 +160,7 @@ class StorageService {
 						? { ...track, isMain: track.isMain ?? false } // legacy: isMain was optional
 						: track,
 				),
-				bookmarks: scene.bookmarks ?? [],
+				bookmarks: normalizeBookmarks({ raw: scene.bookmarks }),
 				createdAt: new Date(scene.createdAt),
 				updatedAt: new Date(scene.updatedAt),
 			})) ?? [];