chore: standardize security and quality foundations

frontend/app/globals.css

@@ -1,41 +1,5 @@
 @import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600&display=swap');
 
-:root {
-  color-scheme: light;
-  --ink: #0f1117;
-  --ink-muted: #3f4656;
-  --paper: #f0f4ff;
-  --paper-strong: #ffffff;
-  --accent: #ff6b2b;
-  --accent-2: #1c6bff;
-  --accent-3: #11d6c6;
-  --border: rgba(15, 17, 23, 0.12);
-  --shadow: rgba(15, 17, 23, 0.18);
-  --glow: 0 0 18px rgba(28, 107, 255, 0.25);
-  --input-bg: rgba(15, 17, 23, 0.04);
-  --input-ink: var(--ink);
-  --error-bg: rgba(255, 107, 43, 0.12);
-  --error-ink: #6b2c17;
-}
-
-[data-theme='dark'] {
-  color-scheme: dark;
-  --ink: #e9ecf5;
-  --ink-muted: #9aa3b8;
-  --paper: #0b0f18;
-  --paper-strong: #111827;
-  --accent: #ff6b2b;
-  --accent-2: #3b82f6;
-  --accent-3: #22f6e3;
-  --border: rgba(255, 255, 255, 0.08);
-  --shadow: rgba(0, 0, 0, 0.6);
-  --glow: 0 0 22px rgba(59, 130, 246, 0.45);
-  --input-bg: rgba(255, 255, 255, 0.08);
-  --input-ink: var(--ink);
-  --error-bg: rgba(255, 107, 43, 0.18);
-  --error-ink: #ffd3bf;
-}
-
 * {
   box-sizing: border-box;
   margin: 0;
@@ -2505,38 +2469,6 @@ button span {
 /* Professional UI Refresh (graphite / silver / black + subtle blue accents) */
 /* -------------------------------------------------------------------------- */
 
-:root {
-  --ink: #10151d;
-  --ink-muted: #5b6472;
-  --paper: #eaedf1;
-  --paper-strong: #f8fafc;
-  --accent: #3f78d7;
-  --accent-2: #5ea0ff;
-  --accent-3: #8fa7c8;
-  --border: rgba(16, 21, 29, 0.1);
-  --shadow: rgba(16, 21, 29, 0.14);
-  --glow: 0 0 0 transparent;
-  --input-bg: rgba(16, 21, 29, 0.03);
-  --error-bg: rgba(185, 28, 28, 0.08);
-  --error-ink: #7f1d1d;
-}
-
-[data-theme='dark'] {
-  --ink: #edf1f7;
-  --ink-muted: #98a2b3;
-  --paper: #090c10;
-  --paper-strong: #11151b;
-  --accent: #4b7fdb;
-  --accent-2: #66a3ff;
-  --accent-3: #93a6c4;
-  --border: rgba(255, 255, 255, 0.07);
-  --shadow: rgba(0, 0, 0, 0.45);
-  --glow: 0 0 0 transparent;
-  --input-bg: rgba(255, 255, 255, 0.035);
-  --error-bg: rgba(248, 113, 113, 0.12);
-  --error-ink: #fecaca;
-}
-
 body {
   font-family: "Manrope", "Segoe UI", sans-serif;
   background:
@@ -3075,40 +3007,6 @@ button:disabled {
 }
 
 /* Release 1.1 UI Refresh: Professional control-panel theme */
-:root {
-  --ink: #111318;
-  --ink-muted: #5f6776;
-  --paper: #eef1f6;
-  --paper-strong: #ffffff;
-  --accent: #4e8ef7;
-  --accent-2: #77abff;
-  --accent-3: #9dbdff;
-  --border: rgba(17, 19, 24, 0.1);
-  --shadow: rgba(17, 19, 24, 0.16);
-  --glow: 0 0 0 1px rgba(78, 142, 247, 0.08), 0 14px 30px rgba(16, 20, 28, 0.08);
-  --input-bg: rgba(17, 19, 24, 0.035);
-  --input-ink: var(--ink);
-  --error-bg: rgba(225, 81, 81, 0.12);
-  --error-ink: #6f1f1f;
-}
-
-[data-theme='dark'] {
-  --ink: #eef1f7;
-  --ink-muted: #9aa3b2;
-  --paper: #0a0d12;
-  --paper-strong: #12161d;
-  --accent: #5d9cff;
-  --accent-2: #87b5ff;
-  --accent-3: #a5c4ff;
-  --border: rgba(255, 255, 255, 0.08);
-  --shadow: rgba(0, 0, 0, 0.55);
-  --glow: 0 0 0 1px rgba(93, 156, 255, 0.12), 0 18px 42px rgba(0, 0, 0, 0.38);
-  --input-bg: rgba(255, 255, 255, 0.035);
-  --input-ink: var(--ink);
-  --error-bg: rgba(248, 113, 113, 0.14);
-  --error-ink: #ffd4d4;
-}
-
 body {
   font-family: "Manrope", "Segoe UI", sans-serif;
   background:
@@ -3853,12 +3751,6 @@ button:disabled {
 }
 
 /* Enterprise polish pass */
-[data-theme='dark'] {
-  --accent: #6f95c6;
-  --accent-2: #8aa9d1;
-  --accent-3: #b2c5de;
-}
-
 body {
   background:
     radial-gradient(circle at 12% -8%, rgba(111, 149, 198, 0.08), transparent 40%),