fix(appearance): make Sahara actually differ from Warm light

The sampled colours were Warm light's own (#faf6ea / #e8dfc9 / #ddd2b8) —
the annotated screenshot was that theme, and the request written on it was
"just a little darker". Keep the cream on panels and the entry strip, take
the page, tab bar, toolbars and table headers a shade deeper, and move the
accent from burnt orange to ochre so the two are told apart in the picker.

frontend/src/components/SettingsModal.tsx

@@ -412,7 +412,7 @@ const THEME_SWATCH: Record<Exclude<ThemeChoice, 'auto'>, { bg: string; card: str
   'light-warm':    { bg: '#e8dfc9', card: '#faf6ea', accent: '#b8410c' },
   'light-cool':    { bg: '#f4f6f8', card: '#ffffff', accent: '#2563eb' },
   'light-sage':    { bg: '#eef1ec', card: '#f8faf6', accent: '#2f855a' },
-  'sahara':        { bg: '#e8dfca', card: '#faf6eb', accent: '#b45309' },
+  'sahara':        { bg: '#dcceab', card: '#faf6eb', accent: '#a55f14' },
   'light-nordic':  { bg: '#eef1f7', card: '#ffffff', accent: '#4f46e5' },
   'dim-slate':     { bg: '#343b47', card: '#3d4552', accent: '#fb923c' },
   'dark-warm':     { bg: '#221d18', card: '#2e2820', accent: '#e07a2e' },

frontend/src/style.css

@@ -775,34 +775,37 @@
   color-scheme: light;
 }
 
-/* ---- Theme 1e: Sahara — warm sand, from an operator's own palette ---------
+/* ---- Theme 1e: Sahara — Warm light, taken a step deeper --------------------
-   Three sands, lightest to darkest: panels sit on #faf6eb, the page behind them
+   Warm light's cream is kept for panels and the entry strip (#faf6eb, the one
-   on #e8dfca, and toolbars, table headers and rows on #ddd2ba. The order is the
+   surface an operator stares at while typing a call), but the page behind them
-   point — a panel must read as lifted OFF the page, and the log grid as settled
+   and every toolbar, tab bar and table header go one shade further into the
-   INTO it, which is what makes rows scannable without lines everywhere.
+   sand. That was the whole request: same family, just a little darker, so the
-   Ink is a deep warm brown rather than black: pure black on sand glares. ---- */
+   cream panels lift clearly instead of blending into the page.
+   Ink is a deep warm brown rather than black: pure black on sand glares.
+   The accent moves from Warm light's burnt orange to ochre to keep the two
+   themes apart at a glance in the theme picker. ---------------------------- */
 [data-theme="sahara"] {
-  --background: #e8dfca;            /* sand — the page */
+  --background: #dcceab;            /* deep sand — the page */
   --foreground: #2b2318;            /* deep warm brown-ink */
-  --card: #faf6eb;                  /* lifted panel / entry strip */
+  --card: #faf6eb;                  /* lifted panel / entry strip — kept cream */
   --card-foreground: #2b2318;
   --popover: #faf6eb;
   --popover-foreground: #2b2318;
-  --primary: #b45309;               /* burnt sienna */
+  --primary: #a55f14;               /* ochre */
   --primary-foreground: #fffbf2;
-  --secondary: #ddd2ba;
+  --secondary: #cdbb92;
   --secondary-foreground: #2b2318;
-  --muted: #ddd2ba;                 /* toolbars / table headers — the darkest sand */
+  --muted: #cdbb92;                 /* toolbars / tab bar / table headers */
-  --muted-foreground: #5c503c;      /* readable on both sands */
+  --muted-foreground: #544731;      /* readable on both sands */
-  --accent: #ecd9b8;                /* warm highlight */
+  --accent: #e9d3a6;                /* warm highlight */
   --accent-foreground: #6b3a06;
   --destructive: #b91c1c;
   --destructive-foreground: #ffffff;
   --destructive-muted: #fdecec;
   --destructive-muted-foreground: #b91c1c;
-  --border: #c9bc9e;                /* sand a step down again, so edges read */
+  --border: #b6a179;                /* sand a step down again, so edges read */
-  --input: #c9bc9e;
+  --input: #b6a179;
-  --ring: #d97706;                  /* amber focus ring */
+  --ring: #c2760c;                  /* amber focus ring */
 
   --success: #15803d;
   --success-foreground: #ffffff;
@@ -840,10 +843,10 @@
   --mx-call-work: #7fd6a4;
   --mx-dx-conf:   #3730a3;
   --mx-dx-work:   #a5b4fc;
-  --mx-none:      #ddd2ba;
+  --mx-none:      #cdbb92;
 
-  --scrollbar-thumb: #c0b193;
+  --scrollbar-thumb: #ac9868;
-  --scrollbar-thumb-hover: #a89676;
+  --scrollbar-thumb-hover: #927d4e;
   --card-shadow: 0 1px 2px rgba(43, 35, 24, 0.07), 0 0 0 1px rgba(43, 35, 24, 0.03);
   color-scheme: light;
 }