feat: default script library to 'All Scripts' tab showing all accessible scripts

Added 'All Scripts' as the first/default tab (no mine/shared filter) so the
page opens with every script the user can access. My Scripts and Team Scripts
tabs remain for filtered views.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/ScriptLibraryPage.tsx

@@ -11,13 +11,13 @@ import { ParameterizeAndSavePanel } from '@/components/scripts/ParameterizeAndSa
 import { scriptsApi } from '@/api'
 import type { ScriptParameter } from '@/types'
 
-type LibraryTab = 'mine' | 'team'
+type LibraryTab = 'all' | 'mine' | 'team'
 
 export default function ScriptLibraryPage() {
   const [paneMode, setPaneMode] = useState<'browse' | 'configure'>('browse')
   // inputValue owned here so it survives Configure ↔ Browse transitions
   const [inputValue, setInputValue] = useState('')
-  const [activeTab, setActiveTab] = useState<LibraryTab>('mine')
+  const [activeTab, setActiveTab] = useState<LibraryTab>('all')
 
   const loadCategories = useScriptGeneratorStore(s => s.loadCategories)
   const loadTemplates = useScriptGeneratorStore(s => s.loadTemplates)
@@ -52,13 +52,19 @@ export default function ScriptLibraryPage() {
       parameters_schema: payload.parameters_schema,
     })
     setShowImportPanel(false)
-    const filters = activeTab === 'mine' ? { mine: true } : { shared: true }
+    const filters =
+      activeTab === 'mine' ? { mine: true } :
+      activeTab === 'team' ? { shared: true } :
+      {}
     loadTemplates(filters)
   }
 
   useEffect(() => {
     loadCategories().then(() => {
-      const filters = activeTab === 'mine' ? { mine: true } : { shared: true }
+      const filters =
+        activeTab === 'mine' ? { mine: true } :
+        activeTab === 'team' ? { shared: true } :
+        {}
       loadTemplates(filters)
     })
   }, [loadCategories, loadTemplates, activeTab])
@@ -132,6 +138,13 @@ export default function ScriptLibraryPage() {
 
       {/* Tab bar */}
       <div className="flex gap-6 border-b border-border">
+        <button
+          type="button"
+          onClick={() => onTabChange('all')}
+          className={`pb-2 text-sm font-medium transition-colors ${tabClass('all')}`}
+        >
+          All Scripts
+        </button>
         <button
           type="button"
           onClick={() => onTabChange('mine')}