docs: rewrite agents file

AGENTS.md

@@ -1,121 +1,17 @@
-# AGENTS.md
+# Agents.md
 
-## Overview
+## Apps
 
-Privacy-first video editor, with a focus on simplicity and ease of use.
+- Web
+- Desktop
 
-## Lib vs Utils
+## Rust
 
-- `lib/` - domain logic (specific to this app)
-- `utils/` - small helper utils (generic, could be copy-pasted into any other app)
+Shared code between apps live in `rust/`, not in `packages/`
 
-## Core Editor System
+## Web
 
-The editor uses a **singleton EditorCore** that manages all editor state through specialized managers.
+### React
 
-### Architecture
+- Read components before using them. They may already apply classes, which affects what you need to pass and how to override them.
 
-```
-EditorCore (singleton)
-├── playback: PlaybackManager
-├── timeline: TimelineManager
-├── scene: SceneManager
-├── project: ProjectManager
-├── media: MediaManager
-└── renderer: RendererManager
-```
-
-### When to Use What
-
-#### In React Components
-
-**Always use the `useEditor()` hook:**
-
-```typescript
-import { useEditor } from '@/hooks/use-editor';
-
-function MyComponent() {
-  const editor = useEditor();
-  const tracks = editor.timeline.getTracks();
-
-  // Call methods
-  editor.timeline.addTrack({ type: 'media' });
-
-  // Display data (auto re-renders on changes)
-  return <div>{tracks.length} tracks</div>;
-}
-```
-
-The hook:
-
-- Returns the singleton instance
-- Subscribes to all manager changes
-- Automatically re-renders when state changes
-
-#### Outside React Components
-
-**Use `EditorCore.getInstance()` directly:**
-
-```typescript
-// In utilities, event handlers, or non-React code
-import { EditorCore } from "@/core";
-
-const editor = EditorCore.getInstance();
-await editor.export({ format: "mp4", quality: "high" });
-```
-
-## Actions System
-
-Actions are the trigger layer for user-initiated operations. The single source of truth is `@/lib/actions/definitions.ts`.
-
-**To add a new action:**
-
-1. Add it to `ACTIONS` in `@/lib/actions/definitions.ts`:
-
-```typescript
-export const ACTIONS = {
-  "my-action": {
-    description: "What the action does",
-    category: "editing",
-    defaultShortcuts: ["ctrl+m"],
-  },
-  // ...
-};
-```
-
-2. Add handler in `@/hooks/use-editor-actions.ts`:
-
-```typescript
-useActionHandler(
-  "my-action",
-  () => {
-    // implementation
-  },
-  undefined,
-);
-```
-
-**In components, use `invokeAction()` for user-triggered operations:**
-
-```typescript
-import { invokeAction } from '@/lib/actions';
-
-// Good - uses action system
-const handleSplit = () => invokeAction("split-selected");
-
-// Avoid - bypasses UX layer (toasts, validation feedback)
-const handleSplit = () => editor.timeline.splitElements({ ... });
-```
-
-Direct `editor.xxx()` calls are for internal use (commands, tests, complex multi-step operations).
-
-## Commands System
-
-Commands handle undo/redo. They live in `@/lib/commands/` organized by domain (timeline, media, scene).
-
-Each command extends `Command` from `@/lib/commands/base-command` and implements:
-
-- `execute()` - saves current state, then does the mutation
-- `undo()` - restores the saved state
-
-Actions and commands work together: actions are "what triggered this", commands are "how to do it (and undo it)".

apps/web/open-next.config.ts

@@ -0,0 +1,3 @@
+import { defineCloudflareConfig } from "@opennextjs/cloudflare";
+
+export default defineCloudflareConfig();

apps/web/package.json

@@ -24,7 +24,7 @@
     "@huggingface/transformers": "^3.8.1",
     "@opencut/env": "workspace:*",
     "@opencut/ui": "workspace:*",
-    "@opennextjs/cloudflare": "^1.17.3",
+    "@opennextjs/cloudflare": "^1.18.0",
     "@radix-ui/react-accordion": "^1.2.12",
     "@radix-ui/react-checkbox": "^1.3.3",
     "@radix-ui/react-dialog": "^1.1.15",

apps/web/src/components/editor/panels/assets/views/sounds.tsx

@@ -42,7 +42,6 @@ export function SoundsView() {
 				<div className="px-3 pt-4 pb-0">
 					<TabsList>
 						<TabsTrigger value="sound-effects">Sound effects</TabsTrigger>
-						<TabsTrigger value="songs">Songs</TabsTrigger>
 						<TabsTrigger value="saved">Saved</TabsTrigger>
 					</TabsList>
 				</div>
@@ -59,12 +58,6 @@ export function SoundsView() {
 				>
 					<SavedSoundsView />
 				</TabsContent>
-				<TabsContent
-					value="songs"
-					className="mt-0 flex min-h-0 flex-1 flex-col p-5 pt-0"
-				>
-					<SongsView />
-				</TabsContent>
 			</Tabs>
 		</div>
 	);
@@ -485,10 +478,6 @@ function SavedSoundsView() {
 	);
 }
 
-function SongsView() {
-	return <div>Songs</div>;
-}
-
 interface AudioItemProps {
 	sound: SoundEffect;
 	isPlaying: boolean;

apps/web/src/components/editor/panels/properties/components/property-param-field.tsx

@@ -1,7 +1,11 @@
 "use client";
 
 import type { ParamDefinition, NumberParamDefinition } from "@/lib/params";
-import { formatNumberForDisplay, snapToStep } from "@/utils/math";
+import {
+	formatNumberForDisplay,
+	getFractionDigitsForStep,
+	snapToStep,
+} from "@/utils/math";
 import { SectionField } from "@/components/section";
 import { NumberField } from "@/components/ui/number-field";
 import { Switch } from "@/components/ui/switch";
@@ -156,7 +160,7 @@ function NumberParamField({
 		onPreview(clamped / displayMultiplier);
 	};
 
-	const maxFractionDigits = step >= 1 ? 0 : Math.round(-Math.log10(step));
+	const maxFractionDigits = getFractionDigitsForStep({ step });
 
 	const draft = usePropertyDraft({
 		displayValue: formatNumberForDisplay({

apps/web/src/components/editor/panels/properties/tabs/audio-tab.tsx

@@ -1,7 +1,13 @@
 import { NumberField } from "@/components/ui/number-field";
 import { VOLUME_DB_MAX, VOLUME_DB_MIN } from "@/lib/timeline/audio-constants";
 import { DEFAULTS } from "@/lib/timeline/defaults";
-import { clamp, isNearlyEqual } from "@/utils/math";
+import {
+	clamp,
+	formatNumberForDisplay,
+	getFractionDigitsForStep,
+	isNearlyEqual,
+	snapToStep,
+} from "@/utils/math";
 import type { AudioElement, VideoElement } from "@/lib/timeline";
 import { resolveNumberAtTime } from "@/lib/animation";
 import { useElementPlayhead } from "../hooks/use-element-playhead";
@@ -18,6 +24,9 @@ import {
 	SectionTitle,
 } from "@/components/section";
 
+const VOLUME_STEP = 0.1;
+const VOLUME_FRACTION_DIGITS = getFractionDigitsForStep({ step: VOLUME_STEP });
+
 export function AudioTab({
 	element,
 	trackId,
@@ -42,17 +51,24 @@ export function AudioTab({
 		propertyPath: "volume",
 		localTime,
 		isPlayheadWithinElementRange,
-		displayValue: resolvedVolume.toFixed(1),
+		displayValue: formatNumberForDisplay({
+			value: resolvedVolume,
+			fractionDigits: VOLUME_FRACTION_DIGITS,
+		}),
 		parse: (input) => {
 			const parsed = parseFloat(input);
 			if (Number.isNaN(parsed)) {
 				return null;
 			}
 
-			return clamp({ value: parsed, min: VOLUME_DB_MIN, max: VOLUME_DB_MAX });
+			return clamp({
+				value: snapToStep({ value: parsed, step: VOLUME_STEP }),
+				min: VOLUME_DB_MIN,
+				max: VOLUME_DB_MAX,
+			});
 		},
 		valueAtPlayhead: resolvedVolume,
-		step: 0.1,
+		step: VOLUME_STEP,
 		buildBaseUpdates: ({ value }) => ({
 			volume: value,
 		}),

apps/web/src/components/editor/panels/properties/tabs/masks-tab.tsx

@@ -38,7 +38,12 @@ import {
 	TooltipContent,
 	TooltipTrigger,
 } from "@/components/ui/tooltip";
-import { clamp, formatNumberForDisplay, snapToStep } from "@/utils/math";
+import {
+	clamp,
+	formatNumberForDisplay,
+	getFractionDigitsForStep,
+	snapToStep,
+} from "@/utils/math";
 import {
 	Section,
 	SectionContent,
@@ -599,7 +604,7 @@ function MaskNumberField({
 	const max = isPercent ? 100 : param.max;
 	const step = isPercent ? 1 : param.step;
 	const displayValue = value * displayMultiplier;
-	const maxFractionDigits = step >= 1 ? 0 : Math.round(-Math.log10(step));
+	const maxFractionDigits = getFractionDigitsForStep({ step });
 
 	const clampDisplay = (nextDisplayValue: number) =>
 		max !== undefined

apps/web/src/components/editor/panels/properties/tabs/speed-tab.tsx

@@ -22,16 +22,28 @@ import {
 	SectionTitle,
 } from "@/components/section";
 import { usePropertyDraft } from "../hooks/use-property-draft";
+import {
+	formatNumberForDisplay,
+	getFractionDigitsForStep,
+	snapToStep,
+} from "@/utils/math";
+
+const SPEED_STEP = 0.01;
+const SPEED_FRACTION_DIGITS = getFractionDigitsForStep({ step: SPEED_STEP });
 
 function rateToDisplay({ rate }: { rate: number }): string {
-	return rate.toFixed(2);
+	return formatNumberForDisplay({
+		value: rate,
+		fractionDigits: SPEED_FRACTION_DIGITS,
+	});
 }
 
 function parseSpeedInput({ input }: { input: string }): number | null {
 	const parsed = parseFloat(input);
 	if (Number.isNaN(parsed)) return null;
-	const rounded = Math.round(parsed * 100) / 100;
-	return clampRetimeRate({ rate: rounded });
+	return clampRetimeRate({
+		rate: snapToStep({ value: parsed, step: SPEED_STEP }),
+	});
 }
 
 function buildRetime({
@@ -56,24 +68,21 @@ export function SpeedTab({
 	const rate = clampRetimeRate({
 		rate: element.retime?.rate ?? DEFAULT_RETIME_RATE,
 	});
-	const maintainPitchAvailable = canMaintainPitch({ rate });
+	const isPitchPreserveAvailable = canMaintainPitch({ rate });
 	const maintainPitch = element.retime?.maintainPitch ?? false;
 	const pendingRateRef = useRef(rate);
 
-	const applyRetime = ({
+	const commitRetime = ({
 		rate: nextRate,
 		maintainPitch: nextMaintainPitch,
-		pushHistory = true,
 	}: {
 		rate: number;
 		maintainPitch: boolean;
-		pushHistory?: boolean;
 	}) => {
 		editor.timeline.updateElementRetime({
 			trackId,
 			elementId: element.id,
 			retime: buildRetime({ rate: nextRate, maintainPitch: nextMaintainPitch }),
-			pushHistory,
 		});
 	};
 
@@ -82,10 +91,20 @@ export function SpeedTab({
 		parse: (input) => parseSpeedInput({ input }),
 		onPreview: (nextRate) => {
 			pendingRateRef.current = nextRate;
-			applyRetime({ rate: nextRate, maintainPitch, pushHistory: false });
+			editor.timeline.previewElements({
+				updates: [
+					{
+						trackId,
+						elementId: element.id,
+						updates: {
+							retime: buildRetime({ rate: nextRate, maintainPitch }),
+						},
+					},
+				],
+			});
 		},
 		onCommit: () => {
-			applyRetime({ rate: pendingRateRef.current, maintainPitch });
+			commitRetime({ rate: pendingRateRef.current, maintainPitch });
 		},
 	});
 
@@ -115,7 +134,7 @@ export function SpeedTab({
 							onScrub={speedDraft.scrubTo}
 							onScrubEnd={speedDraft.commitScrub}
 							onReset={() =>
-								applyRetime({ rate: DEFAULT_RETIME_RATE, maintainPitch })
+								commitRetime({ rate: DEFAULT_RETIME_RATE, maintainPitch })
 							}
 							isDefault={rate === DEFAULT_RETIME_RATE}
 						/>
@@ -124,9 +143,9 @@ export function SpeedTab({
 						<span className="text-sm">Change pitch</span>
 						<Switch
 							checked={!maintainPitch}
-						disabled={!maintainPitchAvailable}
+							disabled={!isPitchPreserveAvailable}
 							onCheckedChange={(checked) =>
-							applyRetime({ rate, maintainPitch: !checked })
+								commitRetime({ rate, maintainPitch: !checked })
 							}
 						/>
 					</div>

apps/web/src/components/editor/panels/properties/tabs/text-tab.tsx

@@ -16,7 +16,7 @@ import {
 import { ColorPicker } from "@/components/ui/color-picker";
 import { Button } from "@/components/ui/button";
 import { uppercase } from "@/utils/string";
-import { clamp } from "@/utils/math";
+import { clamp, formatNumberForDisplay } from "@/utils/math";
 import { useEditor } from "@/hooks/use-editor";
 import { DEFAULT_COLOR } from "@/constants/project-constants";
 import {
@@ -251,7 +251,10 @@ function SpacingSection({
 	});
 
 	const lineHeight = usePropertyDraft({
-		displayValue: (element.lineHeight ?? DEFAULTS.text.lineHeight).toFixed(1),
+		displayValue: formatNumberForDisplay({
+			value: element.lineHeight ?? DEFAULTS.text.lineHeight,
+			fractionDigits: 1,
+		}),
 		parse: (input) => {
 			const parsed = parseFloat(input);
 			return Number.isNaN(parsed)

apps/web/src/components/editor/panels/timeline/bookmarks.tsx

@@ -27,7 +27,7 @@ import { ColorPicker } from "@/components/ui/color-picker";
 import { Button } from "@/components/ui/button";
 import { Label } from "@/components/ui/label";
 import { uppercase } from "@/utils/string";
-import { clamp } from "@/utils/math";
+import { clamp, formatNumberForDisplay } from "@/utils/math";
 import {
 	timelineTimeToPixels,
 	timelineTimeToSnappedPixels,
@@ -188,7 +188,7 @@ function TimelineBookmark({
 						left: `${bookmarkLeft}px`,
 						width: `${bookmarkWidth}px`,
 					}}
-					aria-label={`Bookmark at ${time.toFixed(1)}s`}
+					aria-label={`Bookmark at ${formatNumberForDisplay({ value: time, fractionDigits: 1 })}s`}
 					type="button"
 					onMouseDown={handleMouseDown}
 					onClick={handleClick}

apps/web/src/middleware.ts

@@ -1,6 +1,6 @@
 import { NextResponse } from "next/server";
 
-export async function proxy() {
+export async function middleware() {
 	return NextResponse.next();
 }
 

apps/web/src/services/storage/quota.ts

@@ -1,3 +1,5 @@
+import { formatNumberForDisplay } from "@/utils/math";
+
 const BYTE_UNITS = ["B", "KB", "MB", "GB", "TB"] as const;
 
 export const STORAGE_HEADROOM_RESERVE_BYTES = 50 * 1024 * 1024;
@@ -37,7 +39,7 @@ export function formatStorageBytes({ bytes }: { bytes: number }): string {
 	}
 
 	const precision = value >= 10 || unitIndex === 0 ? 0 : 1;
-	return `${value.toFixed(precision)} ${BYTE_UNITS[unitIndex]}`;
+	return `${formatNumberForDisplay({ value, fractionDigits: precision })} ${BYTE_UNITS[unitIndex]}`;
 }
 
 export async function readStorageQuotaStatus(): Promise<StorageQuotaStatus> {

apps/web/src/utils/math.ts

@@ -22,7 +22,7 @@ export function clampRound({
 	return Math.round(clamp({ value, min, max }));
 }
 
-function getFractionDigitsForStep({ step }: { step: number }): number {
+export function getFractionDigitsForStep({ step }: { step: number }): number {
 	const normalizedStep = step.toString().toLowerCase();
 	if (normalizedStep.includes("e-")) {
 		return Number(normalizedStep.split("e-")[1] ?? 0);
@@ -59,12 +59,43 @@ export function isNearlyEqual({
 
 export function formatNumberForDisplay({
 	value,
+	fractionDigits,
+	minFractionDigits = 0,
 	maxFractionDigits = 6,
 }: {
 	value: number;
+	fractionDigits?: number;
+	minFractionDigits?: number;
 	maxFractionDigits?: number;
 }): string {
-	return Number(value.toFixed(maxFractionDigits)).toString();
+	const resolvedMaxFractionDigits = Math.max(
+		0,
+		fractionDigits ?? maxFractionDigits,
+	);
+	const resolvedMinFractionDigits = Math.min(
+		Math.max(0, fractionDigits ?? minFractionDigits),
+		resolvedMaxFractionDigits,
+	);
+	const fixedValue = value.toFixed(resolvedMaxFractionDigits);
+
+	if (resolvedMaxFractionDigits === 0) {
+		return Number(fixedValue) === 0 ? "0" : fixedValue;
+	}
+
+	const [integerPart, fractionPart = ""] = fixedValue.split(".");
+	const normalizedIntegerPart = Number(fixedValue) === 0 ? "0" : integerPart;
+	let trimmedFractionPart = fractionPart;
+
+	while (
+		trimmedFractionPart.length > resolvedMinFractionDigits &&
+		trimmedFractionPart.endsWith("0")
+	) {
+		trimmedFractionPart = trimmedFractionPart.slice(0, -1);
+	}
+
+	return trimmedFractionPart
+		? `${normalizedIntegerPart}.${trimmedFractionPart}`
+		: normalizedIntegerPart;
 }
 
 export function evaluateMathExpression({

bun.lock

@@ -26,7 +26,7 @@
         "@huggingface/transformers": "^3.8.1",
         "@opencut/env": "workspace:*",
         "@opencut/ui": "workspace:*",
-        "@opennextjs/cloudflare": "^1.17.3",
+        "@opennextjs/cloudflare": "^1.18.0",
         "@radix-ui/react-accordion": "^1.2.12",
         "@radix-ui/react-checkbox": "^1.3.3",
         "@radix-ui/react-dialog": "^1.1.15",
@@ -517,7 +517,7 @@
 
     "@opennextjs/aws": ["@opennextjs/aws@3.9.16", "", { "dependencies": { "@ast-grep/napi": "^0.40.5", "@aws-sdk/client-cloudfront": "3.984.0", "@aws-sdk/client-dynamodb": "3.984.0", "@aws-sdk/client-lambda": "3.984.0", "@aws-sdk/client-s3": "3.984.0", "@aws-sdk/client-sqs": "3.984.0", "@node-minify/core": "^8.0.6", "@node-minify/terser": "^8.0.6", "@tsconfig/node18": "^1.0.3", "aws4fetch": "^1.0.20", "chalk": "^5.6.2", "cookie": "^1.0.2", "esbuild": "0.25.4", "express": "^5.1.0", "path-to-regexp": "^6.3.0", "urlpattern-polyfill": "^10.1.0", "yaml": "^2.8.1" }, "peerDependencies": { "next": "~15.0.8 || ~15.1.12 || ~15.2.9 || ~15.3.9 || ~15.4.11 || ~15.5.10 || ~16.0.11 || ^16.1.5" }, "bin": { "open-next": "dist/index.js" } }, "sha512-jQQStCysIllNCPqz5W2KSguXpr+ETlOcD8SyNu+h9zwpRVYk4uEPQge+ErG3avI5xsT8vKA7EGLYG59dhj/B6Q=="],
 
-    "@opennextjs/cloudflare": ["@opennextjs/cloudflare@1.17.3", "", { "dependencies": { "@ast-grep/napi": "^0.40.5", "@dotenvx/dotenvx": "1.31.0", "@opennextjs/aws": "3.9.16", "cloudflare": "^4.4.1", "comment-json": "^4.5.1", "enquirer": "^2.4.1", "glob": "^12.0.0", "ts-tqdm": "^0.8.6", "yargs": "^18.0.0" }, "peerDependencies": { "next": "~15.0.8 || ~15.1.12 || ~15.2.9 || ~15.3.9 || ~15.4.11 || ~15.5.10 || ~16.0.11 || ^16.1.5", "wrangler": "^4.65.0" }, "bin": { "opennextjs-cloudflare": "dist/cli/index.js" } }, "sha512-BQT8R/CEqrZS2sYydJ6uqv3U+yZAxbTeDUfgqQIlOnhu3wDPsB/QuuUBBseWOZiOdZ8gLegK6F2SLKia74Nv6g=="],
+    "@opennextjs/cloudflare": ["@opennextjs/cloudflare@1.18.0", "", { "dependencies": { "@ast-grep/napi": "^0.40.5", "@dotenvx/dotenvx": "1.31.0", "@opennextjs/aws": "3.9.16", "cloudflare": "^4.4.1", "comment-json": "^4.5.1", "enquirer": "^2.4.1", "glob": "^12.0.0", "ts-tqdm": "^0.8.6", "yargs": "^18.0.0" }, "peerDependencies": { "next": "~15.0.8 || ~15.1.12 || ~15.2.9 || ~15.3.9 || ~15.4.11 || ~15.5.10 || ~16.0.11 || ^16.1.5", "wrangler": "^4.65.0" }, "bin": { "opennextjs-cloudflare": "dist/cli/index.js" } }, "sha512-JM236YHnKzroFAZqst1t28ZGOShvnkVUDtjrp7TJ/W2P3RLo4b6npJ8VEXOn6frs6lsUfR5rvsKYLYb7h1GIJQ=="],
 
     "@poppinss/colors": ["@poppinss/colors@4.1.6", "", { "dependencies": { "kleur": "^4.1.5" } }, "sha512-H9xkIdFswbS8n1d6vmRd8+c10t2Qe+rZITbbDHHkQixH5+2x1FDGmi/0K+WgWiqQFKPSlIYB7jlH6Kpfn6Fleg=="],