refactor: UI consistency — shared CSS, design system colors, no inline styles

Phase 1: Extract 6 shared CSS modules (table-section, log-panel,
rate-colors, refresh-indicator, chart-card, section-card) eliminating
~135 duplicate class definitions across 11 files.

Phase 2: Replace all hardcoded hex colors in CSS modules with design
system variables. Strip ~55 hex fallbacks from var() patterns. Fix 4
undefined variable names (--accent, --bg-base, --surface, --bg-surface-raised).

Phase 3: Replace ~45 hardcoded hex values in ProcessDiagram SVG
components with var() CSS custom properties. Fix Dashboard.tsx color prop.

Phase 4: Create CSS modules for AdminLayout, DatabaseAdminPage,
OidcCallback (previously 100% inline). Extract shared PageLoader
component (replaces 3 copy-pasted spinner patterns). Move AppsTab
static inline styles to CSS classes. Extract LayoutShell StarredList styles.

58 files changed, net -219 lines.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/Admin/AuditLogPage.tsx

@@ -5,6 +5,7 @@ import {
 import type { Column } from '@cameleer/design-system';
 import { useAuditLog, type AuditEvent } from '../../api/queries/admin/audit';
 import styles from './AuditLogPage.module.css';
+import tableStyles from '../../styles/table-section.module.css';
 
 const CATEGORIES = [
   { value: '', label: 'All categories' },
@@ -117,11 +118,11 @@ export default function AuditLogPage() {
         />
       </div>
 
-      <div className={styles.tableSection}>
-        <div className={styles.tableHeader}>
-          <span className={styles.tableTitle}>Audit Log</span>
-          <div className={styles.tableRight}>
-            <span className={styles.tableMeta}>
+      <div className={tableStyles.tableSection}>
+        <div className={tableStyles.tableHeader}>
+          <span className={tableStyles.tableTitle}>Audit Log</span>
+          <div className={tableStyles.tableRight}>
+            <span className={tableStyles.tableMeta}>
               {totalCount} events
             </span>
             <Badge label="AUTO" color="success" />