feat(graph-ui): polish memory graph visuals

ui/themes.js

@@ -16,19 +16,19 @@ export const THEMES = {
         surfaceHigh: '#2a2a2d',
         surfaceHighest: '#353438',
         surfaceLow: '#1b1b1e',
-        surfaceLowest: '#0e0e11',
+        surfaceLowest: '#050814',
         onSurface: '#e4e1e6',
         onSurfaceDim: 'rgba(228, 225, 230, 0.6)',
         border: 'rgba(255, 255, 255, 0.08)',
         borderActive: 'rgba(233, 69, 96, 0.4)',
         // 节点颜色
-        nodeCharacter: '#e94560',
-        nodeEvent: '#4fc3f7',
-        nodeLocation: '#66bb6a',
-        nodeThread: '#ffd54f',
-        nodeRule: '#ab47bc',
-        nodeSynopsis: '#b388ff',
-        nodeReflection: '#80deea',
+        nodeCharacter: '#ff4f8b',
+        nodeEvent: '#4fd8ff',
+        nodeLocation: '#75ffb1',
+        nodeThread: '#ffe66d',
+        nodeRule: '#c778ff',
+        nodeSynopsis: '#bca7ff',
+        nodeReflection: '#86f7ff',
     },
     cyan: {
         name: 'Neon Cyan',
@@ -44,18 +44,18 @@ export const THEMES = {
         surfaceHigh: '#222a2d',
         surfaceHighest: '#2d3538',
         surfaceLow: '#171d1e',
-        surfaceLowest: '#0e1111',
+        surfaceLowest: '#031019',
         onSurface: '#e0f7fa',
         onSurfaceDim: 'rgba(224, 247, 250, 0.6)',
         border: 'rgba(0, 229, 255, 0.1)',
         borderActive: 'rgba(0, 229, 255, 0.4)',
-        nodeCharacter: '#00e5ff',
-        nodeEvent: '#2979ff',
-        nodeLocation: '#00bfa5',
-        nodeThread: '#ffab40',
-        nodeRule: '#7c4dff',
-        nodeSynopsis: '#18ffff',
-        nodeReflection: '#84ffff',
+        nodeCharacter: '#62f3ff',
+        nodeEvent: '#438cff',
+        nodeLocation: '#22f0c6',
+        nodeThread: '#ffc46b',
+        nodeRule: '#9a75ff',
+        nodeSynopsis: '#58ffff',
+        nodeReflection: '#b0ffff',
     },
     amber: {
         name: 'Amber Console',
@@ -71,18 +71,18 @@ export const THEMES = {
         surfaceHigh: '#2a2822',
         surfaceHighest: '#35322a',
         surfaceLow: '#1b1a17',
-        surfaceLowest: '#0e0d0b',
+        surfaceLowest: '#100b03',
         onSurface: '#e4e1d6',
         onSurfaceDim: 'rgba(228, 225, 214, 0.6)',
         border: 'rgba(255, 179, 0, 0.1)',
         borderActive: 'rgba(255, 179, 0, 0.4)',
-        nodeCharacter: '#ffb300',
-        nodeEvent: '#e65100',
-        nodeLocation: '#00d2fe',
-        nodeThread: '#ff6e40',
-        nodeRule: '#9e9d24',
-        nodeSynopsis: '#ffd740',
-        nodeReflection: '#ffab40',
+        nodeCharacter: '#ffc247',
+        nodeEvent: '#ff7a22',
+        nodeLocation: '#4fe4ff',
+        nodeThread: '#ff8f68',
+        nodeRule: '#d0cf4a',
+        nodeSynopsis: '#ffe66d',
+        nodeReflection: '#ffc46b',
     },
     violet: {
         name: 'Violet Haze',
@@ -98,18 +98,18 @@ export const THEMES = {
         surfaceHigh: '#28222d',
         surfaceHighest: '#332b38',
         surfaceLow: '#1a171e',
-        surfaceLowest: '#0e0c11',
+        surfaceLowest: '#090615',
         onSurface: '#e8e0f0',
         onSurfaceDim: 'rgba(232, 224, 240, 0.6)',
         border: 'rgba(179, 136, 255, 0.1)',
         borderActive: 'rgba(179, 136, 255, 0.4)',
-        nodeCharacter: '#ea80fc',
-        nodeEvent: '#7c4dff',
-        nodeLocation: '#80cbc4',
-        nodeThread: '#ff80ab',
-        nodeRule: '#b388ff',
-        nodeSynopsis: '#ce93d8',
-        nodeReflection: '#80deea',
+        nodeCharacter: '#f19cff',
+        nodeEvent: '#9572ff',
+        nodeLocation: '#98f0e8',
+        nodeThread: '#ff9cbd',
+        nodeRule: '#c7a8ff',
+        nodeSynopsis: '#dfabeb',
+        nodeReflection: '#9cf4ff',
     },
     /** 亮色 · 晨光纸感（暖纸面 + 青绿主色 + 琥珀强调） */
     paperDawn: {