feat: Clip effects, asset sorting, and timeline improvements

Major features and improvements:

* **Clip Effects**:
  * Added UI in Properties Panel to manage effects on video/image clips (add, remove, toggle, reorder).
  * Implemented dynamic parameter fields for effects.
  * Added support for keyframing effect parameters.

* **Assets Panel**:
  * Added sorting options: Name, Type, Duration, and File Size.
  * Persisted view preferences (grid/list mode, sort order) to local storage.
  * Refactored media item rendering and drag interactions.

* **Timeline & Interaction**:
  * **Keyframe Dragging**: Added ability to drag keyframes directly on the timeline element.
  * **Resizing**: Improved resize logic to respect neighboring clips (prevents overlaps).
  * **Visuals**: Implemented tiled background rendering for video/image clips on the timeline.
  * **Shortcuts**: Added "Deselect All" action bound to the `Escape` key.
  * **Fixes**: Corrected drag-and-drop coordinate calculations when the timeline track area is scrolled.

* **Text Elements**:
  * Refactored text background storage to use an explicit `enabled` flag.
  * Added `V8toV9` storage migration to update existing projects.

* **Architecture**:
  * Moved export state management to `ProjectManager` for better lifecycle handling.
  * Refactored `PropertiesPanel` sections to be more composable (custom headers, borders).

1 files changed, 152 insertions, 0 deletions

diff --git a/apps/web/src/components/editor/panels/properties/effect-param-field.tsx b/apps/web/src/components/editor/panels/properties/effect-param-field.tsx
new file mode 100644
index 00000000..408d430a
--- /dev/null
+++ b/apps/web/src/components/editor/panels/properties/effect-param-field.tsx
@@ -0,0 +1,152 @@
+"use client";
+
+import type { EffectParamDefinition, NumberEffectParamDefinition } from "@/types/effects";
+import { clamp } from "@/utils/math";
+import { SectionField } from "./section";
+import { Slider } from "@/components/ui/slider";
+import { NumberField } from "@/components/ui/number-field";
+import { Switch } from "@/components/ui/switch";
+import {
+	Select,
+	SelectContent,
+	SelectItem,
+	SelectTrigger,
+	SelectValue,
+} from "@/components/ui/select";
+import { usePropertyDraft } from "./hooks/use-property-draft";
+
+export function EffectParamField({
+	param,
+	value,
+	onPreview,
+	onCommit,
+}: {
+	param: EffectParamDefinition;
+	value: number | string | boolean;
+	onPreview: (value: number | string | boolean) => void;
+	onCommit: () => void;
+}) {
+	return (
+		<SectionField label={param.label}>
+			<EffectParamInput param={param} value={value} onPreview={onPreview} onCommit={onCommit} />
+		</SectionField>
+	);
+}
+
+function EffectParamInput({
+	param,
+	value,
+	onPreview,
+	onCommit,
+}: {
+	param: EffectParamDefinition;
+	value: number | string | boolean;
+	onPreview: (value: number | string | boolean) => void;
+	onCommit: () => void;
+}) {
+	if (param.type === "number") {
+		return (
+			<NumberParamField
+				param={param}
+				value={typeof value === "number" ? value : Number(value)}
+				onPreview={onPreview}
+				onCommit={onCommit}
+			/>
+		);
+	}
+
+	if (param.type === "boolean") {
+		return (
+			<Switch
+				checked={Boolean(value)}
+				onCheckedChange={(checked) => {
+					onPreview(checked);
+					onCommit();
+				}}
+			/>
+		);
+	}
+
+	if (param.type === "select") {
+		return (
+			<Select
+				value={String(value)}
+				onValueChange={(selected) => {
+					onPreview(selected);
+					onCommit();
+				}}
+			>
+				<SelectTrigger className="w-full">
+					<SelectValue />
+				</SelectTrigger>
+				<SelectContent>
+					{param.options.map((option) => (
+						<SelectItem key={option.value} value={option.value}>
+							{option.label}
+						</SelectItem>
+					))}
+				</SelectContent>
+			</Select>
+		);
+	}
+
+	if (param.type === "color") {
+		return (
+			<input
+				type="color"
+				className="h-8 w-full cursor-pointer rounded border"
+				value={String(value)}
+				onChange={(event) => onPreview(event.target.value)}
+				onBlur={onCommit}
+			/>
+		);
+	}
+
+	return null;
+}
+
+function NumberParamField({
+	param,
+	value,
+	onPreview,
+	onCommit,
+}: {
+	param: NumberEffectParamDefinition;
+	value: number;
+	onPreview: (value: number) => void;
+	onCommit: () => void;
+}) {
+	const { min, max, step } = param;
+
+	const draft = usePropertyDraft({
+		displayValue: String(value),
+		parse: (input) => {
+			const parsed = parseFloat(input);
+			if (Number.isNaN(parsed)) return null;
+			return clamp({ value: parsed, min, max });
+		},
+		onPreview,
+		onCommit,
+	});
+
+	return (
+		<div className="flex items-center gap-3">
+			<Slider
+				className="flex-1"
+				min={min}
+				max={max}
+				step={step}
+				value={[value]}
+				onValueChange={([newValue]) => onPreview(newValue)}
+				onValueCommit={onCommit}
+			/>
+			<NumberField
+				className="w-16 shrink-0"
+				value={draft.displayValue}
+				onFocus={draft.onFocus}
+				onChange={draft.onChange}
+				onBlur={draft.onBlur}
+			/>
+		</div>
+	);
+}