feat: upgrade web GUI to modular ES6 and add Chart.js

This commit completely overhauls the initial GUI:
- Splits monolithic JS/CSS into an ES6 module structure
- Implements an industrial 'Control Room' dark theme
- Adds dynamic file selection endpoints for CSV and JSON judge logs
- Integrates Chart.js to automatically render visualizations from CSV data
- Updates web_gui_plan.md to reflect architectural changes

5 files changed, 504 insertions, 0 deletions

diff --git a/api/static/css/base.css b/api/static/css/base.css
new file mode 100644
index 0000000..aa28ba5
--- /dev/null
+++ b/api/static/css/base.css
@@ -0,0 +1,66 @@
+:root {
+    /* Colors - Deep Industrial Dark */
+    --color-bg-0: #0a0a0b;      /* Deepest background */
+    --color-bg-1: #121214;      /* Sidebar / Cards */
+    --color-bg-2: #1c1c1f;      /* Input fields */
+    --color-bg-3: #2a2a2e;      /* Borders / Hover */
+
+    /* Text */
+    --color-text-primary: #f0f0f2;
+    --color-text-secondary: #9ea0a6;
+    --color-text-muted: #62646c;
+
+    /* Accent - Pure Purple */
+    --color-accent: #9d4edd;
+    --color-accent-hover: #7b2cbf;
+    --color-accent-text: #ffffff;
+
+    /* Semantic */
+    --color-success: #10b981;
+    --color-warning: #f59e0b;
+    --color-danger: #ef4444;
+    --color-info: #3b82f6;
+
+    /* Spacing & Borders */
+    --border-width: 1px;
+    --border-radius: 4px; /* Crisp corners */
+    --space-xs: 4px;
+    --space-sm: 8px;
+    --space-md: 16px;
+    --space-lg: 24px;
+    --space-xl: 32px;
+
+    /* Transitions */
+    --transition-fast: 0.15s ease;
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+    background-color: var(--color-bg-0);
+    color: var(--color-text-primary);
+    line-height: 1.5;
+    height: 100vh;
+    overflow: hidden; /* Main scroll happens in panes */
+}
+
+/* Scrollbar Styling */
+::-webkit-scrollbar {
+    width: 6px;
+    height: 6px;
+}
+::-webkit-scrollbar-track {
+    background: var(--color-bg-0);
+}
+::-webkit-scrollbar-thumb {
+    background: var(--color-bg-3);
+    border-radius: 10px;
+}
+::-webkit-scrollbar-thumb:hover {
+    background: var(--color-accent);
+}
diff --git a/api/static/css/components.css b/api/static/css/components.css
new file mode 100644
index 0000000..9b9a823
--- /dev/null
+++ b/api/static/css/components.css
@@ -0,0 +1,161 @@
+/* Buttons */
+.btn {
+    appearance: none;
+    border: none;
+    font-family: inherit;
+    font-size: 0.875rem;
+    font-weight: 600;
+    padding: 10px 16px;
+    border-radius: var(--border-radius);
+    cursor: pointer;
+    transition: var(--transition-fast);
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    gap: var(--space-sm);
+    text-transform: uppercase;
+    letter-spacing: 0.02em;
+}
+
+.btn-primary {
+    background-color: var(--color-accent);
+    color: var(--color-accent-text);
+}
+.btn-primary:hover:not(:disabled) {
+    background-color: var(--color-accent-hover);
+}
+
+.btn-danger {
+    background-color: transparent;
+    border: var(--border-width) solid var(--color-danger);
+    color: var(--color-danger);
+}
+.btn-danger:hover:not(:disabled) {
+    background-color: var(--color-danger);
+    color: white;
+}
+
+.btn-ghost {
+    background-color: transparent;
+    color: var(--color-text-secondary);
+    border: var(--border-width) solid var(--color-bg-3);
+}
+.btn-ghost:hover:not(:disabled) {
+    background-color: var(--color-bg-3);
+    color: var(--color-text-primary);
+}
+
+.btn:disabled {
+    opacity: 0.4;
+    cursor: not-allowed;
+    filter: grayscale(1);
+}
+
+/* Forms */
+.form-group {
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-xs);
+    margin-bottom: var(--space-md);
+}
+
+.form-label {
+    font-size: 0.75rem;
+    font-weight: 700;
+    color: var(--color-text-muted);
+    text-transform: uppercase;
+}
+
+.input-field {
+    background-color: var(--color-bg-2);
+    border: var(--border-width) solid var(--color-bg-3);
+    border-radius: var(--border-radius);
+    padding: 10px 12px;
+    color: var(--color-text-primary);
+    font-size: 0.9375rem;
+    width: 100%;
+    transition: border-color var(--transition-fast);
+}
+
+.input-field:focus {
+    outline: none;
+    border-color: var(--color-accent);
+}
+
+/* Tabs */
+.tab-nav {
+    display: flex;
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    padding: 0 var(--space-lg);
+    background-color: var(--color-bg-1);
+}
+
+.tab-trigger {
+    background: none;
+    border: none;
+    padding: 14px 20px;
+    color: var(--color-text-secondary);
+    font-size: 0.875rem;
+    font-weight: 600;
+    cursor: pointer;
+    border-bottom: 2px solid transparent;
+    transition: var(--transition-fast);
+}
+
+.tab-trigger:hover {
+    color: var(--color-text-primary);
+}
+
+.tab-trigger.active {
+    color: var(--color-accent);
+    border-bottom-color: var(--color-accent);
+}
+
+.tab-panel {
+    display: none;
+    padding: var(--space-lg);
+}
+
+.tab-panel.active {
+    display: block;
+}
+
+/* Cards */
+.card {
+    background-color: var(--color-bg-1);
+    border: var(--border-width) solid var(--color-bg-3);
+    border-radius: var(--border-radius);
+    overflow: hidden;
+}
+
+.card-header {
+    padding: var(--space-md);
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    font-size: 0.75rem;
+    font-weight: 700;
+    text-transform: uppercase;
+    color: var(--color-text-muted);
+}
+
+.card-body {
+    padding: var(--space-md);
+}
+
+/* Badges */
+.badge {
+    font-size: 0.7rem;
+    font-weight: 800;
+    padding: 2px 8px;
+    border-radius: 2px;
+    text-transform: uppercase;
+}
+
+.badge-idle { background: var(--color-bg-3); color: var(--color-text-secondary); }
+.badge-running { background: var(--color-accent); color: white; animation: blink 1.5s infinite; }
+.badge-complete { background: var(--color-success); color: white; }
+
+@keyframes blink {
+    0% { opacity: 1; }
+    50% { opacity: 0.6; }
+    100% { opacity: 1; }
+}
diff --git a/api/static/css/layout.css b/api/static/css/layout.css
new file mode 100644
index 0000000..ef0fc2d
--- /dev/null
+++ b/api/static/css/layout.css
@@ -0,0 +1,87 @@
+.dashboard-root {
+    display: grid;
+    grid-template-columns: 320px 1fr;
+    grid-template-rows: 1fr 300px;
+    height: 100vh;
+    width: 100vw;
+}
+
+/* Sidebar - Left Column */
+.sidebar {
+    grid-row: 1 / -1;
+    background-color: var(--color-bg-1);
+    border-right: var(--border-width) solid var(--color-bg-3);
+    padding: var(--space-lg);
+    display: flex;
+    flex-direction: column;
+    gap: var(--space-xl);
+    z-index: 10;
+}
+
+/* Main Area - Top Right */
+.main-viewport {
+    grid-column: 2;
+    grid-row: 1;
+    overflow-y: auto;
+    background-color: var(--color-bg-0);
+    display: flex;
+    flex-direction: column;
+}
+
+/* Terminal - Bottom Right */
+.terminal-dock {
+    grid-column: 2;
+    grid-row: 2;
+    background-color: var(--color-bg-1);
+    border-top: var(--border-width) solid var(--color-bg-3);
+    display: flex;
+    flex-direction: column;
+    overflow: hidden;
+}
+
+/* Header */
+.app-header {
+    padding: var(--space-md) var(--space-lg);
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.logo-area {
+    display: flex;
+    align-items: center;
+    gap: var(--space-sm);
+}
+
+.logo-area h1 {
+    font-size: 1rem;
+    font-weight: 700;
+    letter-spacing: 0.05em;
+    text-transform: uppercase;
+    color: var(--color-accent);
+}
+
+/* Mobile notice */
+@media (max-width: 900px) {
+    .dashboard-root {
+        grid-template-columns: 1fr;
+        grid-template-rows: auto 1fr auto;
+        overflow-y: auto;
+    }
+    .sidebar {
+        grid-row: 1;
+        border-right: none;
+        border-bottom: var(--border-width) solid var(--color-bg-3);
+    }
+    .main-viewport {
+        grid-column: 1;
+        grid-row: 2;
+        height: 500px;
+    }
+    .terminal-dock {
+        grid-column: 1;
+        grid-row: 3;
+        height: 300px;
+    }
+}
diff --git a/api/static/css/results.css b/api/static/css/results.css
new file mode 100644
index 0000000..9a532b8
--- /dev/null
+++ b/api/static/css/results.css
@@ -0,0 +1,113 @@
+.results-container {
+    padding: var(--space-sm);
+}
+
+.results-controls {
+    padding: var(--space-md) var(--space-lg);
+    background-color: var(--color-bg-1);
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    display: flex;
+    align-items: center;
+}
+
+.data-table-wrapper {
+    margin-bottom: var(--space-xl);
+    border: var(--border-width) solid var(--color-bg-3);
+    border-radius: var(--border-radius);
+    overflow: hidden;
+}
+
+.data-table-title {
+    background-color: var(--color-bg-1);
+    padding: var(--space-sm) var(--space-md);
+    font-size: 0.75rem;
+    font-weight: 800;
+    color: var(--color-accent);
+    text-transform: uppercase;
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+}
+
+.data-table {
+    width: 100%;
+    border-collapse: collapse;
+    font-size: 0.8125rem;
+    background-color: var(--color-bg-1);
+    table-layout: auto;
+}
+
+.data-table th {
+    text-align: left;
+    padding: 12px 16px;
+    background-color: var(--color-bg-2);
+    color: var(--color-text-secondary);
+    font-weight: 700;
+    text-transform: uppercase;
+    font-size: 0.65rem;
+    letter-spacing: 0.05em;
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    white-space: nowrap;
+}
+
+.data-table td {
+    padding: 10px 16px;
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    color: var(--color-text-primary);
+    max-width: 400px;
+    white-space: normal;
+    word-wrap: break-word;
+    vertical-align: top;
+}
+
+.data-table tr:last-child td {
+    border-bottom: none;
+}
+
+.data-table tr:hover td {
+    background-color: var(--color-bg-2);
+}
+
+/* Image Grid */
+.image-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
+    gap: var(--space-lg);
+    padding: var(--space-lg);
+}
+
+.image-card {
+    background-color: var(--color-bg-1);
+    border: var(--border-width) solid var(--color-bg-3);
+    border-radius: var(--border-radius);
+    overflow: hidden;
+    transition: var(--transition-fast);
+}
+
+.image-card:hover {
+    border-color: var(--color-accent);
+}
+
+.image-card img {
+    width: 100%;
+    height: auto;
+    display: block;
+    background-color: white; /* Charts usually have white background */
+}
+
+.image-card-footer {
+    padding: var(--space-sm) var(--space-md);
+    font-size: 0.75rem;
+    font-weight: 600;
+    color: var(--color-text-secondary);
+    text-align: center;
+    border-top: var(--border-width) solid var(--color-bg-3);
+}
+
+/* Chart Canvas Container */
+.chart-container {
+    background-color: var(--color-bg-1);
+    border: var(--border-width) solid var(--color-bg-3);
+    border-radius: var(--border-radius);
+    padding: var(--space-md);
+    position: relative;
+    height: 300px;
+}
diff --git a/api/static/css/terminal.css b/api/static/css/terminal.css
new file mode 100644
index 0000000..7cf79ba
--- /dev/null
+++ b/api/static/css/terminal.css
@@ -0,0 +1,77 @@
+.terminal-header {
+    background-color: var(--color-bg-2);
+    padding: var(--space-xs) var(--space-md);
+    border-bottom: var(--border-width) solid var(--color-bg-3);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.terminal-title {
+    font-size: 0.7rem;
+    font-weight: 800;
+    text-transform: uppercase;
+    color: var(--color-text-muted);
+    letter-spacing: 0.1em;
+}
+
+.terminal-body {
+    flex: 1;
+    overflow-y: auto;
+    padding: var(--space-md);
+    font-family: 'JetBrains Mono', 'Fira Code', monospace;
+    font-size: 0.8125rem;
+    line-height: 1.6;
+    background-color: #0d0d0f; /* Slightly darker for terminal */
+}
+
+.terminal-line {
+    white-space: pre-wrap;
+    word-break: break-all;
+    margin-bottom: 2px;
+}
+
+.terminal-line.info { color: var(--color-text-primary); }
+.terminal-line.error { color: var(--color-danger); font-weight: 600; }
+.terminal-line.warning { color: var(--color-warning); }
+.terminal-line.muted { color: var(--color-text-muted); }
+.terminal-line.success { color: var(--color-success); }
+.terminal-line.reasoning { color: var(--color-accent); border-left: 2px solid var(--color-accent); padding-left: var(--space-sm); margin: var(--space-sm) 0; }
+
+.btn-terminal {
+    background: none;
+    border: none;
+    color: var(--color-text-muted);
+    font-size: 0.65rem;
+    font-weight: 700;
+    text-transform: uppercase;
+    cursor: pointer;
+    padding: 4px 8px;
+    border-radius: 2px;
+    transition: var(--transition-fast);
+}
+
+.btn-terminal:hover {
+    color: var(--color-text-primary);
+    background-color: var(--color-bg-3);
+}
+
+.btn-terminal.active {
+    color: var(--color-accent);
+}
+
+.empty-state {
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    height: 300px;
+    color: var(--color-text-muted);
+    font-size: 0.875rem;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    font-weight: 600;
+    border: 2px dashed var(--color-bg-3);
+    margin: var(--space-lg);
+    border-radius: var(--border-radius);
+}