feat: add session library UX with search, filters, actions, and favorites

- Sidebar: search input with live results via querySessions
- Sidebar: filter chips for Running, Error, Pinned, Archived
- Sidebar: per-session context menu with Rename, Duplicate, Pin, Archive
- Sidebar: inline rename editing with Enter/Escape/blur handling
- Sidebar: pinned sessions sort first, archived sessions hidden by default
- NewSessionModal: favorite patterns with star toggle, favorites sort first

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/renderer/App.tsx

@@ -253,6 +253,18 @@ export default function App() {
             onSessionSelect={(sessionId) => {
               void api.selectSession(sessionId);
             }}
+            onRenameSession={(sessionId, title) => {
+              void api.renameSession({ sessionId, title });
+            }}
+            onDuplicateSession={(sessionId) => {
+              void api.duplicateSession({ sessionId });
+            }}
+            onSetSessionPinned={(sessionId, isPinned) => {
+              void api.setSessionPinned({ sessionId, isPinned });
+            }}
+            onSetSessionArchived={(sessionId, isArchived) => {
+              void api.setSessionArchived({ sessionId, isArchived });
+            }}
             workspace={workspace}
           />
         }
@@ -266,6 +278,9 @@ export default function App() {
             setShowNewSession(false);
             void api.createSession({ projectId, patternId });
           }}
+          onTogglePatternFavorite={(patternId, isFavorite) => {
+            void api.setPatternFavorite({ patternId, isFavorite });
+          }}
           patterns={workspace.patterns}
           projects={workspace.projects}
         />