fix(themes): fidelity hierarchy nits + #52 residual ANSI (#67, #68)

#67 hierarchy: nord subtext dimmer than text; tokyo-night btop Night
blues; ethereal surface raise + muted darker than overlay; retro-82
surface raised; ristretto subtext distinct + btop main_bg align;
flexoki-light distinct bright-black; gruvbox overlay/subtext ladder
(no rename).

#68 residual ANSI: vantablack ansi[8]=muted; osaka-jade ansi[3]=warn.

Verified: python3 tools/check-theme-contrast.py themes/ → 24×7 all pass.

themes/ethereal.json

@@ -7,11 +7,11 @@
   "colors": {
     "base": "#060B1E",
     "mantle": "#05091a",
-    "surface": "#060B1E",
+    "surface": "#0e1836",
     "overlay": "#6d7db6",
     "text": "#ffcead",
     "subtext": "#F99957",
-    "muted": "#6d7db6",
+    "muted": "#5568a0",
     "accent": "#7d82d9",
     "accentAlt": "#c89dc1",
     "good": "#92a593",

themes/flexoki-light.json

@@ -48,7 +48,7 @@
     "#CE5D97",
     "#3AA99F",
     "#FFFCF0",
-    "#100F0F",
+    "#6F6E69",
     "#D14D41",
     "#879A39",
     "#D0A215",

themes/gruvbox.json

@@ -8,9 +8,9 @@
     "base": "#282828",
     "mantle": "#222222",
     "surface": "#3c3836",
-    "overlay": "#3c3836",
+    "overlay": "#504945",
     "text": "#d4be98",
-    "subtext": "#d4be98",
+    "subtext": "#a89984",
     "muted": "#7c6f64",
     "accent": "#7daea3",
     "accentAlt": "#d3869b",

themes/nord.json

@@ -10,7 +10,7 @@
     "surface": "#3b4252",
     "overlay": "#4c566a",
     "text": "#d8dee9",
-    "subtext": "#e5e9f0",
+    "subtext": "#b7becc",
     "muted": "#616e88",
     "accent": "#81a1c1",
     "accentAlt": "#b48ead",

themes/osaka-jade.json

@@ -43,7 +43,7 @@
     "#23372B",
     "#FF5345",
     "#549e6a",
-    "#459451",
+    "#E5C736",
     "#509475",
     "#D2689C",
     "#2DD5B7",

themes/retro-82.json

@@ -7,7 +7,7 @@
   "colors": {
     "base": "#05182e",
     "mantle": "#041427",
-    "surface": "#00172e",
+    "surface": "#0a2540",
     "overlay": "#134e5a",
     "text": "#f6dcac",
     "subtext": "#a7c9c6",

themes/ristretto.json

@@ -10,7 +10,7 @@
     "surface": "#675e5f",
     "overlay": "#948a8b",
     "text": "#e6d9db",
-    "subtext": "#e6d9db",
+    "subtext": "#c3b7b8",
     "muted": "#948a8b",
     "accent": "#f38d70",
     "accentAlt": "#a8a9eb",

themes/ristretto/btop.theme

@@ -2,7 +2,7 @@
 #Reconfigured from monokai theme
 
 # Main background, empty for terminal default, need to be empty if you want transparent background
-theme[main_bg]="#2c2421"
+theme[main_bg]="#2c2525"
 
 # Main text color
 theme[main_fg]="#e6d9db"

themes/tokyo-night/btop.theme

@@ -5,10 +5,10 @@
 theme[main_bg]="#1a1b26"
 
 # Main text color
-theme[main_fg]="#cfc9c2"
+theme[main_fg]="#a9b1d6"
 
 # Title color for boxes
-theme[title]="#cfc9c2"
+theme[title]="#a9b1d6"
 
 # Highlight color for keyboard shortcuts
 theme[hi_fg]="#7dcfff"
@@ -17,7 +17,7 @@ theme[hi_fg]="#7dcfff"
 theme[selected_bg]="#414868"
 
 # Foreground color of selected item in processes box
-theme[selected_fg]="#cfc9c2"
+theme[selected_fg]="#a9b1d6"
 
 # Color of inactive/disabled text
 theme[inactive_fg]="#565f89"

themes/vantablack.json

@@ -48,7 +48,7 @@
     "#9b9b9b",
     "#b0b0b0",
     "#ececec",
-    "#fdfdfd",
+    "#666666",
     "#a4a4a4",
     "#b6b6b6",
     "#cecece",