feat(ui): world map — jump by clicking chart fields (#19)

Remove the bottom JUMP ROUTES button list; systems adjacent to the current
one become clickable galactic-chart nodes (same POST /api/jump flow, same
state refreshes). Current + unreachable systems are dimmed and not
clickable. NodeGraph gains optional onNodeClick + per-node disabled
(backward-compatible); two smoke tests updated to click chart fields.

components/ui/node-graph.tsx

@@ -13,6 +13,7 @@ export interface NodeGraphNode {
   y: number
   status?: NodeStatus
   sublabel?: string
+  disabled?: boolean   // not clickable even when onNodeClick is set (e.g. the current system)
 }
 
 export interface NodeGraphEdge {
@@ -29,6 +30,7 @@ export interface NodeGraphProps extends React.HTMLAttributes<HTMLDivElement> {
   title?: string
   height?: number
   directed?: boolean
+  onNodeClick?: (id: string) => void   // makes non-disabled nodes clickable buttons
 }
 
 const VARIANT_COLORS: Record<NodeGraphVariant, string> = {
@@ -59,6 +61,7 @@ const NodeGraph = React.forwardRef<HTMLDivElement, NodeGraphProps>(
       title,
       height   = 320,
       directed = false,
+      onNodeClick,
       style,
       ...props
     },
@@ -219,13 +222,21 @@ const NodeGraph = React.forwardRef<HTMLDivElement, NodeGraphProps>(
               const cy = nodePy(node)
               const isHovered   = hovered === node.id
               const statusColor = node.status ? STATUS_COLOR[node.status] : color
+              const clickable   = !!onNodeClick && !node.disabled
 
               return (
                 <g
                   key={node.id}
                   onMouseEnter={() => setHovered(node.id)}
                   onMouseLeave={() => setHovered(null)}
-                  style={{ cursor: 'default' }}
+                  onClick={clickable ? () => onNodeClick(node.id) : undefined}
+                  onKeyDown={clickable
+                    ? (e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onNodeClick(node.id) } }
+                    : undefined}
+                  role={clickable ? 'button' : undefined}
+                  tabIndex={clickable ? 0 : undefined}
+                  aria-label={clickable ? node.label.toUpperCase() : undefined}
+                  style={{ cursor: clickable ? 'pointer' : 'default' }}
                 >
                   {/* Background */}
                   <rect

components/world-map.tsx

@@ -1,13 +1,12 @@
 'use client'
 
 import { useCallback, useEffect, useState } from 'react'
-import { Button } from '@/components/ui/button'
 import { NodeGraph } from '@/components/ui/node-graph'
 import type { WorldState } from '@/lib/game/save'
 
-// WORLD MAP tab — the first live game panel: renders real world state from /api/world and
+// WORLD MAP tab — renders real world state from /api/world. Clicking a system adjacent to the
-// offers a jump button per system adjacent to the current one (NodeGraph nodes are not
+// current one on the galactic chart jumps there (same POST /api/jump flow as before); the
-// clickable upstream, so the affordance lives in this list). Turn-based: fetch on mount,
+// current and unreachable systems are dimmed and not clickable. Turn-based: fetch on mount,
 // refetch via the jump response — no polling.
 
 interface WorldMapPanelProps {
@@ -74,58 +73,34 @@ export function WorldMapPanel({ height = 380 }: WorldMapPanelProps) {
   }
 
   const current = world.systems.find((s) => s.current)!
-  const reachable = world.edges
+  // Systems one jump away — the only clickable chart fields (the same set as the old JUMP ROUTES list).
-    .filter(([a, b]) => a === current.id || b === current.id)
+  const reachableIds = new Set(
-    .map(([a, b]) => (a === current.id ? b : a))
+    world.edges.filter(([a, b]) => a === current.id || b === current.id).map(([a, b]) => (a === current.id ? b : a))
-    .map((id) => world.systems.find((s) => s.id === id)!)
+  )
 
   return (
     <div style={{ display: 'flex', flexDirection: 'column', gap: '0.75rem' }}>
       <NodeGraph
-        nodes={world.systems.map((s) => ({
+        nodes={world.systems.map((s) => {
-          id: String(s.id),
+          const jumpable = !s.current && reachableIds.has(s.id)
-          label: s.name,
+          return {
-          x: s.x,
+            id: String(s.id),
-          y: s.y,
+            label: s.name,
-          status: s.current ? 'ACTIVE' : s.discovered ? 'NEUTRAL' : 'OFFLINE',
+            x: s.x,
-          sublabel: s.current ? 'CURRENT' : s.discovered ? 'DISCOVERED' : 'UNKNOWN',
+            y: s.y,
-        }))}
+            status: s.current ? 'ACTIVE' : jumpable ? 'NEUTRAL' : 'OFFLINE',
+            sublabel: s.current ? 'CURRENT' : jumpable ? (s.discovered ? 'DISCOVERED // JUMP' : 'UNKNOWN // JUMP') : s.discovered ? 'DISCOVERED' : 'UNKNOWN',
+            disabled: !jumpable || jumpingId !== null, // dimmed + not clickable; all locked while a jump is in flight
+          }
+        })}
         edges={world.edges.map(([a, b]) => ({ from: String(a), to: String(b) }))}
         variant="ACTIVE"
         title={`GALACTIC CHART // JUMP ROUTES — TURN ${world.turn}`}
         height={height}
         style={{ width: '100%' }}
+        onNodeClick={(id) => void jump(Number(id))}
       />
 
-      <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', overflow: 'hidden' }}>
-        <div
-          style={{
-            padding: '0.4rem 0.75rem',
-            borderBottom: '1px solid var(--border)',
-            background: 'var(--surface-raised)',
-            fontSize: '0.6rem',
-            color: 'var(--text-muted)',
-            letterSpacing: '0.12em',
-            textTransform: 'uppercase',
-          }}
-        >
-          JUMP ROUTES // FROM {current.name.toUpperCase()}
-        </div>
-        <div style={{ display: 'flex', flexWrap: 'wrap', gap: '0.5rem', padding: '0.6rem 0.75rem' }}>
-          {reachable.map((s) => (
-            <Button
-              key={s.id}
-              variant="OUTLINE"
-              size="SM"
-              disabled={jumpingId !== null}
-              onClick={() => void jump(s.id)}
-            >
-              {jumpingId === s.id ? 'JUMPING…' : `${s.name.toUpperCase()} // JUMP`}
-            </Button>
-          ))}
-        </div>
-      </div>
-
       {error && (
         <div style={{ border: '1px solid var(--border)', background: 'var(--surface)', padding: '0.5rem 0.75rem' }}>
           <span style={{ fontSize: '0.62rem', color: 'var(--color-red)', letterSpacing: '0.08em' }}>

e2e/smoke.spec.ts

@@ -71,12 +71,17 @@ test('tabs switch panels client-side (event log terminal)', async ({ page }) =>
 });
 
 test('world map shows the generated starting system and its neighbours', async ({ page }) => {
+  const world = (await (await page.request.get('/api/world')).json()) as WorldState;
+
   await page.goto('/');
-  // Live chart title carries the turn counter; a fresh save sits at the start with six jump routes.
+  // Live chart title carries the turn counter.
   await expect(page.getByText(/GALACTIC CHART \/\/ JUMP ROUTES — TURN \d+/)).toBeVisible();
-  const jumpButtons = page.getByRole('button', { name: /\/\/ JUMP$/ });
+  // The current system is marked, and every adjacent system is a clickable chart field (role=button).
-  await expect(jumpButtons.first()).toBeVisible();
+  const current = world.systems.find((s) => s.current)!;
-  await expect(jumpButtons).toHaveCount(6);
+  await expect(page.getByText('CURRENT', { exact: true })).toBeVisible();
+  const panel = page.getByRole('tabpanel');
+  const adjacent = world.edges.filter(([a, b]) => a === current.id || b === current.id); // six on a fresh save
+  await expect(panel.getByRole('button')).toHaveCount(adjacent.length);
 });
 
 test('jumping to an adjacent system updates the world state and turn counter', async ({ page }) => {
@@ -87,7 +92,8 @@ test('jumping to an adjacent system updates the world state and turn counter', a
   const targetName = before.systems.find((s) => s.id === targetId)!.name;
 
   await page.goto('/');
-  await page.getByRole('button', { name: `${targetName.toUpperCase()} // JUMP` }).click();
+  // Click the target's chart field — clickable nodes are role=button with their name as accessible label.
+  await page.getByRole('tabpanel').getByRole('button', { name: targetName.toUpperCase(), exact: true }).click();
 
   const after = (await (await page.request.get('/api/world')).json()) as WorldState;
   expect(after.turn).toBe(before.turn + 1);