style: update visual styles on homepage header, filter bar, kanban

src/components/AppHeader.tsx

@@ -4,7 +4,7 @@ export default function AppHeader() {
   const { searchQuery, setSearchQuery } = useLinear();
 
   return (
-    <header className="h-14 border-b border-border-primary bg-bg-elevated flex items-center px-4 gap-4">
+    <header className="relative h-14 border-b border-border-primary bg-bg-elevated flex items-center px-4 gap-4">
       <div className="flex items-center gap-3">
         <div className="flex items-center gap-2">
           <div className="w-6 h-6 bg-linear-purple rounded flex items-center justify-center">

src/components/FilterBar.tsx

@@ -35,7 +35,7 @@ export default function FilterBar() {
 
   return (
     <div className="border-b border-border-primary bg-bg-elevated px-6 py-3">
-      <div className="flex items-center gap-2 flex-wrap">
+      <div className="flex items-center gap-2 flex-wrap rounded-full border-2 border-[#1F2328] bg-[linear-gradient(#22C55E,#4788FF)] px-3 py-1 shadow-[0_2px_4px_rgba(0,0,0,0.1)]">
         <span className="text-sm text-text-secondary mr-2">Quick filters:</span>
 
         <button

src/components/KanbanBoard.tsx

@@ -1,3 +1,4 @@
+import type { CSSProperties } from "react";
 import { useLinear, Status } from "../context/LinearContext";
 import IssueCard from "./IssueCard";
 
@@ -13,6 +14,25 @@ export default function KanbanBoard() {
   const { issues, searchQuery, statusFilter, priorityFilter, assigneeFilter } =
     useLinear();
 
+  const boardBackgroundStyle: CSSProperties = {
+    backgroundImage:
+      "linear-gradient(to right, #FF0000, #00FF00), url('https://example.com/cartoon-trees.svg')",
+    backgroundSize: "cover, 30% auto",
+    backgroundPosition: "center, left bottom",
+    backgroundRepeat: "no-repeat, no-repeat",
+    backgroundColor: "transparent",
+  };
+
+  const columnBackgroundStyles: Partial<Record<Status, CSSProperties>> = {
+    "in-progress": {
+      backgroundImage: "url('https://example.com/trees.svg')",
+      backgroundSize: "contain",
+      backgroundRepeat: "no-repeat",
+      backgroundPosition: "center",
+      backgroundColor: "#FFFFFF",
+    },
+  };
+
   // Filter issues based on all active filters
   const filteredIssues = issues.filter((issue) => {
     // Search filter
@@ -57,13 +77,20 @@ export default function KanbanBoard() {
 
   return (
     <div className="flex-1 overflow-x-auto overflow-y-hidden">
-      <div className="flex h-full gap-4 p-6 min-w-max">
+      <div
+        className="flex h-full gap-4 p-6 min-w-max"
+        style={boardBackgroundStyle}
+      >
         {columns.map((status) => {
           const columnIssues = filteredIssues.filter(
             (issue) => issue.status === status
           );
           const config = STATUS_CONFIG[status];
 
+          const columnContainerClass = `flex-1 space-y-2 overflow-y-auto${
+            status === "in-review" ? " relative" : ""
+          }`;
+
           return (
             <div key={status} className="flex flex-col w-80 flex-shrink-0">
               <div className="flex items-center gap-2 mb-3 px-1">
@@ -75,7 +102,10 @@ export default function KanbanBoard() {
                 </span>
               </div>
 
-              <div className="flex-1 space-y-2 overflow-y-auto">
+              <div
+                className={columnContainerClass}
+                style={columnBackgroundStyles[status]}
+              >
                 {columnIssues.length === 0 ? (
                   <div className="h-24 border-2 border-dashed border-border-secondary rounded-lg flex items-center justify-center">
                     <p className="text-sm text-text-tertiary">No issues</p>