feat: Implement multi-select combobox filters

src/components/profile/RideCreditFilters.tsx

@@ -4,6 +4,7 @@ import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { Slider } from '@/components/ui/slider';
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from '@/components/ui/collapsible';
+import { MultiSelectCombobox } from '@/components/ui/multi-select-combobox';
 import { RideCreditFilters as FilterTypes } from '@/types/ride-credits';
 import { UserRideCredit } from '@/types/database';
 import { Search, X, ChevronDown, MapPin, Building2, Factory, Calendar, Star, MessageSquare, Image } from 'lucide-react';
@@ -159,38 +160,36 @@ export function RideCreditFilters({
           </CollapsibleTrigger>
           <CollapsibleContent className="p-4 space-y-3 bg-card border rounded-lg mt-1">
             {filterOptions.countries.length > 0 && (
-              <div className="space-y-2">
+              <div className={sectionSpacing}>
                 <Label className="text-sm font-medium">Countries</Label>
-                <div className="flex flex-wrap gap-2">
-                  {filterOptions.countries.map(country => (
-                    <Badge
-                      key={country}
-                      variant={(filters.countries || []).includes(country) ? 'default' : 'outline'}
-                      className="cursor-pointer"
-                      onClick={() => toggleArrayFilter('countries', country)}
-                    >
-                      {country}
-                    </Badge>
-                  ))}
-                </div>
+                <MultiSelectCombobox
+                  options={filterOptions.countries.map(c => ({ label: c, value: c }))}
+                  value={filters.countries || []}
+                  onValueChange={(values) =>
+                    onFilterChange('countries', values.length > 0 ? values : undefined)
+                  }
+                  placeholder="Select countries..."
+                  searchPlaceholder="Search countries..."
+                  emptyText="No countries found"
+                  className={compact ? "h-9 text-sm" : ""}
+                />
               </div>
             )}
 
             {filterOptions.states.length > 0 && (
-              <div className="space-y-2">
+              <div className={sectionSpacing}>
                 <Label className="text-sm font-medium">States/Provinces</Label>
-                <div className="flex flex-wrap gap-2">
-                  {filterOptions.states.map(state => (
-                    <Badge
-                      key={state}
-                      variant={(filters.statesProvinces || []).includes(state) ? 'default' : 'outline'}
-                      className="cursor-pointer"
-                      onClick={() => toggleArrayFilter('statesProvinces', state)}
-                    >
-                      {state}
-                    </Badge>
-                  ))}
-                </div>
+                <MultiSelectCombobox
+                  options={filterOptions.states.map(s => ({ label: s, value: s }))}
+                  value={filters.statesProvinces || []}
+                  onValueChange={(values) =>
+                    onFilterChange('statesProvinces', values.length > 0 ? values : undefined)
+                  }
+                  placeholder="Select states/provinces..."
+                  searchPlaceholder="Search states/provinces..."
+                  emptyText="No states/provinces found"
+                  className={compact ? "h-9 text-sm" : ""}
+                />
               </div>
             )}
           </CollapsibleContent>
@@ -210,20 +209,19 @@ export function RideCreditFilters({
           </CollapsibleTrigger>
           <CollapsibleContent className="p-4 space-y-3 bg-card border rounded-lg mt-1">
             {filterOptions.parks.length > 0 && (
-              <div className="space-y-2">
+              <div className={sectionSpacing}>
                 <Label className="text-sm font-medium">Specific Parks</Label>
-                <div className="flex flex-wrap gap-2">
-                  {filterOptions.parks.map(park => (
-                    <Badge
-                      key={park.id}
-                      variant={(filters.parks || []).includes(park.id) ? 'default' : 'outline'}
-                      className="cursor-pointer"
-                      onClick={() => toggleArrayFilter('parks', park.id)}
-                    >
-                      {park.name}
-                    </Badge>
-                  ))}
-                </div>
+                <MultiSelectCombobox
+                  options={filterOptions.parks.map(p => ({ label: p.name, value: p.id }))}
+                  value={filters.parks || []}
+                  onValueChange={(values) =>
+                    onFilterChange('parks', values.length > 0 ? values : undefined)
+                  }
+                  placeholder="Select parks..."
+                  searchPlaceholder="Search parks..."
+                  emptyText="No parks found"
+                  className={compact ? "h-9 text-sm" : ""}
+                />
               </div>
             )}
           </CollapsibleContent>
@@ -243,20 +241,19 @@ export function RideCreditFilters({
           </CollapsibleTrigger>
           <CollapsibleContent className="p-4 space-y-3 bg-card border rounded-lg mt-1">
             {filterOptions.manufacturers.length > 0 && (
-              <div className="space-y-2">
+              <div className={sectionSpacing}>
                 <Label className="text-sm font-medium">Manufacturers</Label>
-                <div className="flex flex-wrap gap-2">
-                  {filterOptions.manufacturers.map(mfr => (
-                    <Badge
-                      key={mfr.id}
-                      variant={(filters.manufacturers || []).includes(mfr.id) ? 'default' : 'outline'}
-                      className="cursor-pointer"
-                      onClick={() => toggleArrayFilter('manufacturers', mfr.id)}
-                    >
-                      {mfr.name}
-                    </Badge>
-                  ))}
-                </div>
+                <MultiSelectCombobox
+                  options={filterOptions.manufacturers.map(m => ({ label: m.name, value: m.id }))}
+                  value={filters.manufacturers || []}
+                  onValueChange={(values) =>
+                    onFilterChange('manufacturers', values.length > 0 ? values : undefined)
+                  }
+                  placeholder="Select manufacturers..."
+                  searchPlaceholder="Search manufacturers..."
+                  emptyText="No manufacturers found"
+                  className={compact ? "h-9 text-sm" : ""}
+                />
               </div>
             )}
 

src/components/ui/multi-select-combobox.tsx

@@ -0,0 +1,143 @@
+import * as React from "react";
+import { useState, useMemo } from "react";
+import { Check, ChevronsUpDown, X } from "lucide-react";
+import { cn } from "@/lib/utils";
+import { Button } from "@/components/ui/button";
+import { Badge } from "@/components/ui/badge";
+import { Checkbox } from "@/components/ui/checkbox";
+import {
+  Command,
+  CommandEmpty,
+  CommandGroup,
+  CommandInput,
+  CommandItem,
+  CommandList,
+} from "@/components/ui/command";
+import {
+  Popover,
+  PopoverContent,
+  PopoverTrigger,
+} from "@/components/ui/popover";
+
+export interface MultiSelectOption {
+  label: string;
+  value: string;
+}
+
+interface MultiSelectComboboxProps {
+  options: MultiSelectOption[];
+  value?: string[];
+  onValueChange: (values: string[]) => void;
+  placeholder?: string;
+  searchPlaceholder?: string;
+  emptyText?: string;
+  maxDisplay?: number;
+  className?: string;
+}
+
+export function MultiSelectCombobox({
+  options,
+  value = [],
+  onValueChange,
+  placeholder = "Select options...",
+  searchPlaceholder = "Search...",
+  emptyText = "No options found.",
+  maxDisplay = 2,
+  className,
+}: MultiSelectComboboxProps) {
+  const [open, setOpen] = useState(false);
+
+  const handleSelect = (selectedValue: string) => {
+    const newValues = value.includes(selectedValue)
+      ? value.filter((v) => v !== selectedValue)
+      : [...value, selectedValue];
+    onValueChange(newValues);
+  };
+
+  const handleRemove = (valueToRemove: string) => {
+    onValueChange(value.filter((v) => v !== valueToRemove));
+  };
+
+  const displayText = useMemo(() => {
+    if (value.length === 0) return placeholder;
+    if (value.length <= maxDisplay) {
+      return value
+        .map((v) => options.find((o) => o.value === v)?.label)
+        .filter(Boolean)
+        .join(", ");
+    }
+    return `${value.length} selected`;
+  }, [value, options, maxDisplay, placeholder]);
+
+  return (
+    <div className="space-y-2">
+      <Popover open={open} onOpenChange={setOpen}>
+        <PopoverTrigger asChild>
+          <Button
+            variant="outline"
+            role="combobox"
+            aria-expanded={open}
+            className={cn("w-full justify-between", className)}
+          >
+            <span className="truncate">{displayText}</span>
+            <ChevronsUpDown className="ml-2 h-4 w-4 shrink-0 opacity-50" />
+          </Button>
+        </PopoverTrigger>
+        <PopoverContent className="w-full p-0 z-50" align="start">
+          <Command>
+            <CommandInput placeholder={searchPlaceholder} />
+            <CommandList>
+              <CommandEmpty>{emptyText}</CommandEmpty>
+              <CommandGroup>
+                {options.map((option) => (
+                  <CommandItem
+                    key={option.value}
+                    value={option.value}
+                    onSelect={() => handleSelect(option.value)}
+                  >
+                    <Checkbox
+                      checked={value.includes(option.value)}
+                      className="mr-2"
+                    />
+                    <span>{option.label}</span>
+                  </CommandItem>
+                ))}
+              </CommandGroup>
+            </CommandList>
+          </Command>
+        </PopoverContent>
+      </Popover>
+
+      {/* Selected Items Display */}
+      {value.length > 0 && (
+        <div className="flex flex-wrap gap-2">
+          {value.map((v) => {
+            const option = options.find((o) => o.value === v);
+            return option ? (
+              <Badge key={v} variant="secondary" className="gap-1">
+                {option.label}
+                <X
+                  className="w-3 h-3 cursor-pointer hover:text-destructive"
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    handleRemove(v);
+                  }}
+                />
+              </Badge>
+            ) : null;
+          })}
+          {value.length > 1 && (
+            <Button
+              variant="ghost"
+              size="sm"
+              className="h-6 px-2 text-xs"
+              onClick={() => onValueChange([])}
+            >
+              Clear all
+            </Button>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}