feat: add project search and scrollable thread lists

- Add search bar to filter projects by name in real-time
- Implement scrollable thread container with max 4 visible threads
- Add empty state for no search results
- Add clear button (X) to reset search query

web-app/src/locales/en/common.json

@@ -284,7 +284,10 @@
     "updated": "Updated:",
     "collapseThreads": "Collapse threads",
     "expandThreads": "Expand threads",
-    "update": "Update"
+    "update": "Update",
+    "searchProjects": "Search projects...",
+    "noProjectsFound": "No projects found",
+    "tryDifferentSearch": "Try a different search term"
   },
   "toast": {
     "allThreadsUnfavorited": {

web-app/src/routes/project/index.tsx

@@ -14,6 +14,8 @@ import {
   IconFolder,
   IconChevronDown,
   IconChevronRight,
+  IconSearch,
+  IconX,
 } from '@tabler/icons-react'
 import AddProjectDialog from '@/containers/dialogs/AddProjectDialog'
 import { DeleteProjectDialog } from '@/containers/dialogs/DeleteProjectDialog'
@@ -42,6 +44,7 @@ function ProjectContent() {
   const [expandedProjects, setExpandedProjects] = useState<Set<string>>(
     new Set()
   )
+  const [searchQuery, setSearchQuery] = useState('')
 
   const handleDelete = (id: string) => {
     setDeletingId(id)
@@ -93,6 +96,16 @@ function ProjectContent() {
     })
   }
 
+  // Filter projects based on search query
+  const filteredProjects = useMemo(() => {
+    if (!searchQuery.trim()) {
+      return folders
+    }
+    return folders.filter((folder) =>
+      folder.name.toLowerCase().includes(searchQuery.toLowerCase())
+    )
+  }, [folders, searchQuery])
+
   return (
     <div className="flex h-full flex-col justify-center">
       <HeaderPage>
@@ -113,6 +126,33 @@ function ProjectContent() {
       </HeaderPage>
       <div className="h-full overflow-y-auto flex flex-col">
         <div className="p-4 w-full md:w-3/4 mx-auto mt-2">
+          {/* Search Bar */}
+          {folders.length > 0 && (
+            <div className="mb-4">
+              <div className="relative">
+                <IconSearch
+                  size={18}
+                  className="absolute left-3 top-1/2 transform -translate-y-1/2 text-main-view-fg/50"
+                />
+                <input
+                  type="text"
+                  placeholder={t('projects.searchProjects')}
+                  value={searchQuery}
+                  onChange={(e) => setSearchQuery(e.target.value)}
+                  className="w-full pl-10 pr-4 py-2.5 bg-main-view-fg/5 border border-main-view-fg/10 rounded-lg text-main-view-fg placeholder:text-main-view-fg/50 focus:outline-none focus:ring-2 focus:ring-main-view-fg/20 focus:border-main-view-fg/20 transition-all"
+                />
+                {searchQuery && (
+                  <button
+                    onClick={() => setSearchQuery('')}
+                    className="absolute right-3 top-1/2 transform -translate-y-1/2 text-main-view-fg/50 hover:text-main-view-fg transition-colors"
+                  >
+                    <IconX size={18} />
+                  </button>
+                )}
+              </div>
+            </div>
+          )}
+
           {folders.length === 0 ? (
             <div className="flex flex-col items-center justify-center py-12 text-center">
               <IconFolder size={48} className="text-main-view-fg/30 mb-4" />
@@ -123,9 +163,19 @@ function ProjectContent() {
                 {t('projects.noProjectsYetDesc')}
               </p>
             </div>
+          ) : filteredProjects.length === 0 ? (
+            <div className="flex flex-col items-center justify-center py-12 text-center">
+              <IconSearch size={48} className="text-main-view-fg/30 mb-4" />
+              <h3 className="text-lg font-medium text-main-view-fg/60 mb-2">
+                {t('projects.noProjectsFound')}
+              </h3>
+              <p className="text-main-view-fg/50 text-sm">
+                {t('projects.tryDifferentSearch')}
+              </p>
+            </div>
           ) : (
             <div className="space-y-3">
-              {folders
+              {filteredProjects
                 .slice()
                 .sort((a, b) => b.updated_at - a.updated_at)
                 .map((folder) => {
@@ -218,7 +268,9 @@ function ProjectContent() {
 
                       {/* Thread List */}
                       {isExpanded && projectThreads.length > 0 && (
-                        <div className="mt-3 pl-2">
+                        <div 
+                          className="mt-3 pl-2 pr-2 max-h-[190px] overflow-y-auto overflow-x-hidden [&::-webkit-scrollbar]:w-1.5 [&::-webkit-scrollbar-track]:bg-transparent [&::-webkit-scrollbar-thumb]:bg-main-view-fg/20 [&::-webkit-scrollbar-thumb]:rounded-full hover:[&::-webkit-scrollbar-thumb]:bg-main-view-fg/30"
+                        >
                           <ThreadList
                             threads={projectThreads}
                             variant="project"