docs: replace legacy line‑dot‑left‑horizontal icons with unified dot icon across docs

apps/docs/content/(01-linear-structures)/binary-search/153-find-minimum-in-rotated-sorted-array.mdx

@@ -1,7 +1,7 @@
 ---
 title: '153. Find Minimum in Rotated Sorted Array'
 description: 'Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,2,4,5,6,7] might become:'
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Find Minimum in Rotated Sorted Array'
   badge: 'Medium'

apps/docs/content/(01-linear-structures)/binary-search/33-search-in-rotated-sorted-array.mdx

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 ---
 title: '33. Search in Rotated Sorted Array'
 description: There is an integer array nums sorted in ascending order (with distinct values)
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Search in Rotated Sorted Array'
   badge: 'Medium'

apps/docs/content/(01-linear-structures)/binary-search/35-search-insert-position.mdx

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 ---
 title: '35. Search Insert Position'
 description: Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Search Insert Position'
   badge: 'Easy'

apps/docs/content/(01-linear-structures)/binary-search/704-binary-search.mdx

@@ -1,7 +1,7 @@
 ---
 title: '704. Binary Search'
 description: Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If target exists, then return its index. Otherwise, return -1
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Binary Search'
   badge: 'Easy'

apps/docs/content/(01-linear-structures)/binary-search/74-search-a-2d-matrix.mdx

@@ -1,7 +1,7 @@
 ---
 title: '74. Search a 2D Matrix'
 description: 'You are given an m x n integer matrix matrix with the following two properties:'
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Search a 2D Matrix'
   badge: 'Medium'

apps/docs/content/(01-linear-structures)/binary-search/875-koko-eating-bananas.mdx

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 ---
 title: '875. Koko Eating Bananas'
 description: Koko loves to eat bananas. There are n piles of bananas, the i^th pile has piles[i] bananas. The guards have gone and will come back in h hours
-icon: line-dot-left-horizontal
+icon: dot
 sidebar:
   label: 'Koko Eating Bananas'
   badge: 'Medium'