Sync upstream + remove sponsor system + fix API key display

- Sync upstream: simplified config cache, quota, plugins, i18n cleanup
- Remove sponsor system: delete sponsor/code0/claudeApi provider files,
  components, types, descriptors, brand logos, i18n keys, CSS, image assets
- Fix API key display in edit mode: pre-fill key field so eye icon reveals
  actual key value; leave-empty=keep-unchanged contract preserved via
  buildProviderKeyConfig fallback
- Preserve local usage/stats/quota cache and routing/sticky-ttl

Author: NGLSL

src/App.css

@@ -81,51 +81,3 @@
   flex-direction: column;
   gap: $spacing-lg;
 }
-
-.contentWithFloatingAction {
-  padding-bottom: calc(
-    var(--secondary-shell-floating-action-height, 56px) + 12px + env(safe-area-inset-bottom)
-  );
-}
-
-.floatingActionContainer {
-  position: fixed;
-  left: var(--content-center-x, 50%);
-  bottom: calc(12px + env(safe-area-inset-bottom));
-  transform: translateX(-50%);
-  z-index: 50;
-  pointer-events: none;
-  width: fit-content;
-  max-width: calc(100vw - 24px);
-}
-
-.floatingActionSurface {
-  pointer-events: auto;
-  display: inline-flex;
-  align-items: center;
-  gap: 8px;
-  padding: 10px 12px;
-  border-radius: 999px;
-  --glass-blur: 12px;
-  background: var(--glass-bg);
-  backdrop-filter: var(--glass-backdrop-filter);
-  -webkit-backdrop-filter: var(--glass-backdrop-filter);
-  border: 1px solid var(--glass-border);
-  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
-}
-
-:global([data-theme='dark']) {
-  .floatingActionSurface {
-    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
-  }
-}
-
-@media (max-width: 1200px) {
-  .floatingActionContainer {
-    max-width: calc(100vw - 16px);
-  }
-
-  .floatingActionSurface {
-    padding: 8px 10px;
-  }
-}

src/assets/icons/apikey-fun.png

@@ -1,9 +1,7 @@
-import { forwardRef, useLayoutEffect, useRef, type ReactNode } from 'react';
-import { createPortal } from 'react-dom';
+import { forwardRef, type ReactNode } from 'react';
 import { Button } from '@/components/ui/Button';
 import { LoadingSpinner } from '@/components/ui/LoadingSpinner';
 import { IconChevronLeft } from '@/components/ui/icons';
-import { usePageTransitionLayer } from './PageTransitionLayer';
 import styles from './SecondaryScreenShell.module.scss';
 
 export type SecondaryScreenShellProps = {
@@ -12,9 +10,6 @@ export type SecondaryScreenShellProps = {
   backLabel?: string;
   backAriaLabel?: string;
   rightAction?: ReactNode;
-  hideTopBarBackButton?: boolean;
-  hideTopBarRightAction?: boolean;
-  floatingAction?: ReactNode;
   isLoading?: boolean;
   loadingLabel?: ReactNode;
   className?: string;
@@ -30,9 +25,6 @@ export const SecondaryScreenShell = forwardRef<HTMLDivElement, SecondaryScreenSh
       backLabel = 'Back',
       backAriaLabel,
       rightAction,
-      hideTopBarBackButton = false,
-      hideTopBarRightAction = false,
-      floatingAction,
       isLoading = false,
       loadingLabel = 'Loading...',
       className = '',
@@ -42,94 +34,44 @@ export const SecondaryScreenShell = forwardRef<HTMLDivElement, SecondaryScreenSh
     ref
   ) {
     const containerClassName = [styles.container, className].filter(Boolean).join(' ');
-    const contentClasses = [
-      styles.content,
-      floatingAction ? styles.contentWithFloatingAction : '',
-      contentClassName,
-    ]
-      .filter(Boolean)
-      .join(' ');
+    const contentClasses = [styles.content, contentClassName].filter(Boolean).join(' ');
     const titleTooltip = typeof title === 'string' ? title : undefined;
     const resolvedBackAriaLabel = backAriaLabel ?? backLabel;
-    const pageTransitionLayer = usePageTransitionLayer();
-    const isCurrentLayer = pageTransitionLayer ? pageTransitionLayer.isCurrentLayer : true;
-    const shouldRenderFloatingAction = Boolean(floatingAction) && isCurrentLayer;
-    const floatingActionRef = useRef<HTMLDivElement | null>(null);
-
-    useLayoutEffect(() => {
-      if (!shouldRenderFloatingAction) return;
-
-      const element = floatingActionRef.current;
-      if (!element) return;
-
-      const updateHeight = () => {
-        const height = element.getBoundingClientRect().height;
-        document.documentElement.style.setProperty(
-          '--secondary-shell-floating-action-height',
-          `${height}px`
-        );
-      };
-
-      updateHeight();
-      window.addEventListener('resize', updateHeight);
-
-      const resizeObserver =
-        typeof ResizeObserver === 'undefined' ? null : new ResizeObserver(updateHeight);
-      resizeObserver?.observe(element);
-
-      return () => {
-        resizeObserver?.disconnect();
-        window.removeEventListener('resize', updateHeight);
-        document.documentElement.style.removeProperty('--secondary-shell-floating-action-height');
-      };
-    }, [shouldRenderFloatingAction]);
 
     return (
-      <>
-        <div className={containerClassName} ref={ref}>
-          <div className={styles.topBar}>
-            {onBack && !hideTopBarBackButton ? (
-              <Button
-                variant="ghost"
-                size="sm"
-                onClick={onBack}
-                className={styles.backButton}
-                aria-label={resolvedBackAriaLabel}
-              >
-                <span className={styles.backIcon}>
-                  <IconChevronLeft size={18} />
-                </span>
-                <span className={styles.backText}>{backLabel}</span>
-              </Button>
-            ) : (
-              <div />
-            )}
-            <div className={styles.topBarTitle} title={titleTooltip}>
-              {title}
-            </div>
-            <div className={styles.rightSlot}>{hideTopBarRightAction ? null : rightAction}</div>
-          </div>
-
-          {isLoading ? (
-            <div className={styles.loadingState}>
-              <LoadingSpinner size={16} />
-              <span>{loadingLabel}</span>
-            </div>
+      <div className={containerClassName} ref={ref}>
+        <div className={styles.topBar}>
+          {onBack ? (
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={onBack}
+              className={styles.backButton}
+              aria-label={resolvedBackAriaLabel}
+            >
+              <span className={styles.backIcon}>
+                <IconChevronLeft size={18} />
+              </span>
+              <span className={styles.backText}>{backLabel}</span>
+            </Button>
           ) : (
-            <div className={contentClasses}>{children}</div>
+            <div />
           )}
+          <div className={styles.topBarTitle} title={titleTooltip}>
+            {title}
+          </div>
+          <div className={styles.rightSlot}>{rightAction}</div>
         </div>
-        {shouldRenderFloatingAction && typeof document !== 'undefined'
-          ? createPortal(
-              <div className={styles.floatingActionContainer}>
-                <div className={styles.floatingActionSurface} ref={floatingActionRef}>
-                  {floatingAction}
-                </div>
-              </div>,
-              document.body
-            )
-          : null}
-      </>
+
+        {isLoading ? (
+          <div className={styles.loadingState}>
+            <LoadingSpinner size={16} />
+            <span>{loadingLabel}</span>
+          </div>
+        ) : (
+          <div className={contentClasses}>{children}</div>
+        )}
+      </div>
     );
   }
 );