Rename Support nav label to Campaigns, Organize to Groups

Touches user-facing labels only:

- TopNav: Support -> Campaigns, Organize -> Groups
- Sidebar: Organize -> Groups
- MobileBottomNav: Organize -> Groups
- /communities hero kicker: Organize -> Groups

Routes, hooks, and the country-organizers admin feature
(`OrganizersPage` / `useOrganizers` — a separate concept covering
appointed pinners for country feeds) are left alone. Code comments
referring to the "Organize hero" are kept as-is so future readers can
still find their way around by structural name.

src/components/MobileBottomNav.tsx

@@ -110,7 +110,7 @@ export function MobileBottomNav() {
             {/* Organizations */}
             <NavItem
               icon={Users}
-              label="Organize"
+              label="Groups"
               active={isOnCommunities}
               to="/communities"
               onClick={() => { selectionChanged(); setSearchOpen(false); }}

src/components/TopNav.tsx

@@ -34,8 +34,8 @@ interface NavItem {
 
 const NAV_ITEMS: NavItem[] = [
   { label: 'Activity', to: '/feed', icon: Activity },
-  { label: 'Support', to: '/campaigns/all', icon: HandHeart },
-  { label: 'Organize', to: '/communities', icon: Users },
+  { label: 'Campaigns', to: '/campaigns/all', icon: HandHeart },
+  { label: 'Groups', to: '/communities', icon: Users },
   { label: 'Pledge', to: '/pledges', icon: Megaphone },
 ];
 

src/lib/sidebarItems.tsx

@@ -193,7 +193,7 @@ export const SIDEBAR_ITEMS: SidebarItemDef[] = [
   { id: "emojis", label: "Emojis", path: "/emojis", icon: SmilePlus },
   { id: "development", label: "Development", path: "/development", icon: Code },
   { id: "badges", label: "Badges", path: "/badges", icon: Award },
-  { id: "communities", label: "Organize", path: "/communities", icon: Users },
+  { id: "communities", label: "Groups", path: "/communities", icon: Users },
   { id: "world", label: "World", path: "/world", icon: Earth },
 ];
 

src/pages/CommunitiesPage.tsx

@@ -363,7 +363,7 @@ function CommunitiesHero({ onCreateCommunity }: CommunitiesHeroProps) {
       <div className="relative max-w-5xl mx-auto px-4 sm:px-6 py-10 sm:py-12 lg:py-14 min-h-[380px] sm:min-h-[420px] lg:min-h-[460px] flex flex-col items-center text-center">
         <div className="relative space-y-3 max-w-3xl">
           <p className="text-xs sm:text-sm font-semibold uppercase tracking-[0.18em] text-white/85 drop-shadow">
-            Organize
+            Groups
           </p>
           <h1 className="text-4xl sm:text-5xl lg:text-6xl font-bold tracking-tight leading-[1.05] text-white drop-shadow-[0_2px_12px_rgb(0_0_0/0.55)]">
             Strength