Fullfører oppgave 19.5: Paneler kan minimeres til kompakt header

Dobbeltklikk på panel-header toggler minimert tilstand. Minimerte
paneler viser kun header (ikon + tittel), skjuler innhold og
resize-handles. Posisjon, bredde og full høyde bevares i layout
og gjenopprettes ved nytt dobbeltklikk. Tilstanden persisteres
i edge metadata sammen med resten av workspace-layouten.

Endringer:
- PanelLayout: nytt `minimized?`-felt
- BlockShellEvents: nytt `onMinimizeChange`-event
- BlockShell: minimized-prop, dblclick-handler, minimize-knapp,
  skjuler content/resize når minimert
- Workspace-side: håndterer minimize-state, oppdaterer canvas-
  objekthøyde til PANEL_HEADER_HEIGHT når minimert

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/lib/components/blockshell/BlockShell.svelte

@@ -40,6 +40,8 @@
 		receiver?: BlockReceiver;
 		/** Whether to show close button */
 		closable?: boolean;
+		/** Whether panel is minimized (collapsed to header only) */
+		minimized?: boolean;
 		/** Extra CSS class */
 		class?: string;
 		/** Panel content */
@@ -54,12 +56,14 @@
 		constraints = DEFAULT_CONSTRAINTS,
 		receiver,
 		closable = true,
+		minimized = false,
 		class: extraClass = '',
 		children,
 		onClose,
 		onDragMove,
 		onResize,
 		onFullscreenChange,
+		onMinimizeChange,
 		onDrop,
 	}: Props = $props();
 
@@ -127,6 +131,15 @@
 		onFullscreenChange?.(isFullscreen);
 	}
 
+	// --- Minimize toggle (double-click header) ---
+	let hasDragged = false;
+
+	function handleHeaderDblClick() {
+		if (hasDragged) return;
+		if (isFullscreen) return;
+		onMinimizeChange?.(!minimized);
+	}
+
 	// --- Drag (repositioning via header) ---
 	function handleDragStart(e: PointerEvent) {
 		// Only left button, not on buttons
@@ -134,6 +147,7 @@
 		if ((e.target as HTMLElement).closest('button')) return;
 
 		isDragging = true;
+		hasDragged = false;
 		dragStartX = e.clientX;
 		dragStartY = e.clientY;
 
@@ -146,6 +160,9 @@
 		if (!isDragging) return;
 		const dx = e.clientX - dragStartX;
 		const dy = e.clientY - dragStartY;
+		if (Math.abs(dx) > 3 || Math.abs(dy) > 3) {
+			hasDragged = true;
+		}
 		dragStartX = e.clientX;
 		dragStartY = e.clientY;
 		onDragMove?.(dx, dy);
@@ -289,12 +306,13 @@
 	bind:this={containerEl}
 	class="blockshell {extraClass}"
 	class:blockshell-fullscreen={isFullscreen}
+	class:blockshell-minimized={minimized && !isFullscreen}
 	class:blockshell-dragging={isDragging}
 	class:blockshell-resizing={isResizing}
 	class:blockshell-drop-compatible={dropZoneState === 'compatible'}
 	class:blockshell-drop-incompatible={dropZoneState === 'incompatible'}
 	style:width={isFullscreen ? undefined : `${clampedWidth}px`}
-	style:height={isFullscreen ? undefined : `${clampedHeight}px`}
+	style:height={isFullscreen ? undefined : minimized ? undefined : `${clampedHeight}px`}
 	ondragenter={handleDragEnter}
 	ondragover={handleDragOver}
 	ondragleave={handleDragLeave}
@@ -309,6 +327,7 @@
 		onpointerdown={handleDragStart}
 		onpointermove={handleDragMove}
 		onpointerup={handleDragEnd}
+		ondblclick={handleHeaderDblClick}
 	>
 		<div class="blockshell-header-title">
 			{#if icon}
@@ -318,6 +337,16 @@
 		</div>
 
 		<div class="blockshell-controls">
+			{#if !isFullscreen}
+				<button
+					class="blockshell-btn"
+					onclick={() => onMinimizeChange?.(!minimized)}
+					title={minimized ? 'Gjenopprett' : 'Minimer'}
+					aria-label={minimized ? 'Gjenopprett panel' : 'Minimer panel'}
+				>
+					{minimized ? '▢' : '▬'}
+				</button>
+			{/if}
 			<button
 				class="blockshell-btn"
 				onclick={toggleFullscreen}
@@ -339,7 +368,8 @@
 		</div>
 	</div>
 
-	<!-- Content area -->
+	<!-- Content area (hidden when minimized) -->
+	{#if !minimized || isFullscreen}
 		<div class="blockshell-content">
 			{#if children}
 				{@render children()}
@@ -347,6 +377,7 @@
 				<p class="blockshell-empty">Ingen innhold ennå.</p>
 			{/if}
 		</div>
+	{/if}
 
 	<!-- Drop zone overlay -->
 	{#if dropZoneState !== 'idle'}
@@ -361,8 +392,8 @@
 		</div>
 	{/if}
 
-	<!-- Resize handles (hidden in fullscreen and on mobile) -->
+	<!-- Resize handles (hidden in fullscreen, mobile, and minimized) -->
-	{#if !isFullscreen && !isMobile}
+	{#if !isFullscreen && !isMobile && !minimized}
 		{#each resizeDirections as dir}
 			<!-- svelte-ignore a11y_no_static_element_interactions -->
 			<div
@@ -397,6 +428,15 @@
 		border: none;
 	}
 
+	.blockshell-minimized {
+		height: auto !important;
+		min-height: 0;
+	}
+
+	.blockshell-minimized .blockshell-header {
+		border-bottom: none;
+	}
+
 	.blockshell-dragging {
 		opacity: 0.95;
 		box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);

frontend/src/lib/components/blockshell/types.ts

@@ -56,6 +56,8 @@ export interface BlockShellEvents {
 	onResize?: (width: number, height: number) => void;
 	/** Panel fullscreen state changed */
 	onFullscreenChange?: (isFullscreen: boolean) => void;
+	/** Panel minimize state changed (double-click header to toggle) */
+	onMinimizeChange?: (isMinimized: boolean) => void;
 	/** Drop received on this panel */
 	onDrop?: (payload: DragPayload) => void;
 }

frontend/src/lib/workspace/types.ts

@@ -9,6 +9,9 @@
  * Ref: docs/retninger/arbeidsflaten.md § "Tre lag"
  */
 
+/** Height of the BlockShell header — used as minimized panel height */
+export const PANEL_HEADER_HEIGHT = 36;
+
 /** Position and size of a single panel on the canvas */
 export interface PanelLayout {
 	/** Trait name this panel represents */
@@ -21,6 +24,8 @@ export interface PanelLayout {
 	width: number;
 	/** Panel height */
 	height: number;
+	/** Whether panel is minimized (collapsed to header only) */
+	minimized?: boolean;
 }
 
 /** Full workspace layout state */

frontend/src/routes/collection/[id]/+page.svelte

@@ -16,6 +16,7 @@
 		getPanelInfo,
 		generateDefaultLayout,
 		resolveLayout,
+		PANEL_HEADER_HEIGHT,
 	} from '$lib/workspace/types.js';
 
 	// Context header
@@ -139,7 +140,7 @@
 			x: p.x,
 			y: p.y,
 			width: p.width,
-			height: p.height,
+			height: p.minimized ? PANEL_HEADER_HEIGHT : p.height,
 		}))
 	);
 
@@ -197,6 +198,16 @@
 		persistLayout();
 	}
 
+	/** Handle panel minimize/restore toggle */
+	function handlePanelMinimize(trait: string, isMinimized: boolean) {
+		const idx = layout.panels.findIndex(p => p.trait === trait);
+		if (idx >= 0) {
+			layout.panels[idx] = { ...layout.panels[idx], minimized: isMinimized };
+			layout = { ...layout };
+			persistLayout();
+		}
+	}
+
 	/** Handle adding a new panel from the tool menu */
 	function handleAddPanel(trait: string) {
 		// Don't add duplicate panels
@@ -369,8 +380,10 @@
 						icon={info.icon}
 						width={panel?.width ?? obj.width}
 						height={panel?.height ?? obj.height}
+						minimized={panel?.minimized ?? false}
 						onResize={(w, h) => handlePanelResize(trait, w, h)}
 						onClose={() => handlePanelClose(trait)}
+						onMinimizeChange={(m) => handlePanelMinimize(trait, m)}
 					>
 						{#if knownTraits.has(trait)}
 							{#if trait === 'editor'}

tasks.md

@@ -216,8 +216,7 @@ Ref: `docs/retninger/arbeidsflaten.md`, `docs/features/canvas_primitiv.md`
 - [x] 19.2 BlockShell wrapper-komponent: header med tittel + fullskjerm/resize/lukk-knapper, drag-handles for repositionering, resize-handles, drop-sone rendering (highlight ved drag-over). Responsivt (min-size, max-size).
 - [x] 19.3 Arbeidsflaten layout: skriv om `/collection/[id]` fra vertikal stack til Canvas + BlockShell. Last brukerens lagrede arrangement eller bruk defaults fra samlingens traits. Persist arrangement i bruker-edge metadata. Desktop: spatial canvas, mobil: stacked/tabs. Ref: `docs/retninger/arbeidsflaten.md` § "Tre lag".
 - [x] 19.4 Kontekst-header: header tilhører flaten, viser gjeldende node som nedtrekksmeny/kontekst-velger. Mest brukte noder øverst (frekvens/recency), søkbart. Verktøymeny for å instansiere nye paneler. Ref: `docs/retninger/arbeidsflaten.md` § "Kontekst-header".
-- [~] 19.5 Snarveier: paneler kan minimeres til kompakt ikon/fane. Dobbeltklikk → minimer/gjenopprett. Bevarer posisjon og størrelse. Ref: `docs/retninger/arbeidsflaten.md` § "Snarveier".
+- [x] 19.5 Snarveier: paneler kan minimeres til kompakt ikon/fane. Dobbeltklikk → minimer/gjenopprett. Bevarer posisjon og størrelse. Ref: `docs/retninger/arbeidsflaten.md` § "Snarveier".
-  > Påbegynt: 2026-03-18T07:39
 - [ ] 19.6 Personlig flate: brukerens standard arbeidsflate (node_kind: 'workspace'). Vises når ikke koblet til en annen node. Persistent layout.
 
 ## Fase 20: Universell overføring + panelrework