fix: 修復 pagination UI 顯示異常的 bug

fix: 修復 footer_img 配置不生效的 bug
improvement: 優化 背景url 的判斷
feat: 背景圖片配置不再需要添加 url()

layout/includes/header/index.pug

@@ -1,43 +1,41 @@
+-
+  const returnTopImg = img => img !== false ? img || theme.default_top_img : false
+  const isFixedClass = theme.nav.fixed ? ' fixed' : ''
+  var top_img = false
+  let headerClassName = 'not-top-img'
+  var bg_img = ''
+
 if !theme.disable_top_img && page.top_img !== false
   if is_post()
-    - var top_img = page.top_img || page.cover || theme.default_top_img
+    - top_img = page.top_img || page.cover || theme.default_top_img
   else if is_page()
-    - var top_img = page.top_img || theme.default_top_img
+    - top_img = page.top_img || theme.default_top_img
   else if is_tag()
-    - var top_img = theme.tag_per_img && theme.tag_per_img[page.tag]
-    - top_img = top_img ? top_img : (theme.tag_img !== false ? theme.tag_img || theme.default_top_img : false)
+    - top_img = theme.tag_per_img && theme.tag_per_img[page.tag]
+    - top_img = top_img || returnTopImg(theme.tag_img)
   else if is_category()
-    - var top_img = theme.category_per_img && theme.category_per_img[page.category]
-    - top_img = top_img ? top_img : (theme.category_img !== false ? theme.category_img || theme.default_top_img : false)
+    - top_img = theme.category_per_img && theme.category_per_img[page.category]
+    - top_img = top_img || returnTopImg(theme.category_img)
   else if is_home()
-    - var top_img = theme.index_img !== false ? theme.index_img || theme.default_top_img : false
+    - top_img = returnTopImg(theme.index_img)
   else if is_archive()
-    - var top_img = theme.archive_img !== false ? theme.archive_img || theme.default_top_img : false
+    - top_img = returnTopImg(theme.archive_img)
   else
-    - var top_img = page.top_img || theme.default_top_img
+    - top_img = page.top_img || theme.default_top_img
 
   if top_img !== false
-    - var imgSource = top_img && isImgOrUrl(top_img) ? `background-image: url('${url_for(top_img)}')` : `background: ${top_img}`
-    - var bg_img = top_img ? imgSource : ''
-    - var site_title = page.title || page.tag || page.category || config.title
-    - var isHomeClass = is_home() ? 'full_page' : 'not-home-page'
-    - is_post() ? isHomeClass = 'post-bg' : isHomeClass
-  else
-    - var isHomeClass = 'not-top-img'
-else
-  - var top_img = false
-  - var isHomeClass = 'not-top-img'
+    - bg_img = getBgPath(top_img)
+    - headerClassName = is_home() ? 'full_page' : 'not-home-page'
+    - headerClassName = is_post() ? 'post-bg' : headerClassName
 
-- const isFixedClass = theme.nav.fixed ? ' fixed' : ''
-
-header#page-header(class=`${isHomeClass+isFixedClass}` style=bg_img)
+header#page-header(class=`${headerClassName+isFixedClass}` style=bg_img)
   !=partial('includes/header/nav', {}, {cache: true})
   if top_img !== false
     if is_post()
       include ./post-info.pug
-    else if is_home() 
+    else if is_home()
       #site-info
-        h1#site-title=site_title
+        h1#site-title=config.title
         if theme.subtitle.enable
           - var loadSubJs = true
           #site-subtitle
@@ -49,4 +47,4 @@ header#page-header(class=`${isHomeClass+isFixedClass}` style=bg_img)
         i.fas.fa-angle-down.scroll-down-effects
     else
       #page-site-info
-        h1#site-title=site_title
+        h1#site-title=page.title || page.tag || page.category

layout/includes/layout.pug

@@ -13,7 +13,7 @@ html(lang=config.language data-theme=theme.display_mode class=htmlClassHideAside
       !=partial('includes/loading/index', {}, {cache: true})
 
     if theme.background
-      #web_bg
+      #web_bg(style=getBgPath(theme.background))
       
     !=partial('includes/sidebar', {}, {cache: true})
 
@@ -28,15 +28,8 @@ html(lang=config.language data-theme=theme.display_mode class=htmlClassHideAside
           if theme.aside.enable && page.aside !== false
             include widget/index.pug
 
-      - var footerBg = theme.footer_img
-      if (footerBg)
-        if (footerBg === true)
-          - var footer_bg = bg_img
-        else
-          - var footer_bg = isImgOrUrl(theme.footer_bg) ? `background-image: url('${url_for(footerBg)}')` : `background: ${footerBg}`
-      else
-        - var footer_bg = ''
-
+      - const footerBg = theme.footer_img
+      - const footer_bg = footerBg ? footerBg === true ? bg_img : getBgPath(footerBg) : ''
       footer#footer(style=footer_bg)
         !=partial('includes/footer', {}, {cache: true})