diff --git a/ui/src/ui/app-render.helpers.node.test.ts b/ui/src/ui/app-render.helpers.node.test.ts
index 5e343632816..d02706f67e8 100644
--- a/ui/src/ui/app-render.helpers.node.test.ts
+++ b/ui/src/ui/app-render.helpers.node.test.ts
@@ -1061,7 +1061,7 @@ describe("switchChatSession", () => {
     loadChatHistoryMock.mockResolvedValue(undefined);
     loadSessionsMock.mockResolvedValue(undefined);
 
-    switchChatSession(state, "agent:main:test-b");
+    void switchChatSession(state, "agent:main:test-b");
     await Promise.resolve();
 
     expect(state.chatQueue).toStrictEqual([]);
@@ -1133,10 +1133,10 @@ describe("switchChatSession", () => {
     loadChatHistoryMock.mockResolvedValue(undefined);
     loadSessionsMock.mockResolvedValue(undefined);
 
-    switchChatSession(state, "agent:main:other");
+    void switchChatSession(state, "agent:main:other");
     expect(state.chatQueue).toStrictEqual([]);
 
-    switchChatSession(state, "main");
+    void switchChatSession(state, "main");
 
     expect(state.chatQueue).toEqual([{ id: "queued-1", text: "message B", createdAt: 1 }]);
   });
@@ -1180,7 +1180,7 @@ describe("switchChatSession", () => {
     loadChatHistoryMock.mockResolvedValue(undefined);
     loadSessionsMock.mockResolvedValue(undefined);
 
-    switchChatSession(state, "main");
+    void switchChatSession(state, "main");
     await Promise.resolve();
 
     expect(
diff --git a/ui/src/ui/app-render.helpers.ts b/ui/src/ui/app-render.helpers.ts
index 859b0f0dff5..2e6fbad7345 100644
--- a/ui/src/ui/app-render.helpers.ts
+++ b/ui/src/ui/app-render.helpers.ts
@@ -282,7 +282,13 @@ function renderCronFilterIcon(hiddenCount: number) {
 }
 
 export function renderChatSessionSelect(state: AppViewState) {
-  return renderChatSessionSelectBase(state, switchChatSession, { surface: "desktop" });
+  return renderChatSessionSelectBase(
+    state,
+    (targetState, nextSessionKey) => {
+      void switchChatSession(targetState, nextSessionKey);
+    },
+    { surface: "desktop" },
+  );
 }
 
 function chatAutoScrollLabel(mode: ChatAutoScrollMode) {
@@ -586,7 +592,13 @@ export function renderChatMobileToggle(state: AppViewState) {
         }}
       >
         <div class="chat-controls">
-          ${renderChatSessionSelectBase(state, switchChatSession, { surface: "mobile" })}
+          ${renderChatSessionSelectBase(
+            state,
+            (targetState, nextSessionKey) => {
+              void switchChatSession(targetState, nextSessionKey);
+            },
+            { surface: "mobile" },
+          )}
           <div class="chat-controls__thinking">
             ${renderChatAutoScrollToggle(state)}
             <button
@@ -771,7 +783,7 @@ export async function createChatSession(state: AppViewState): Promise<boolean> {
 
   const preservedDraft = state.chatMessage;
   const preservedAttachments = state.chatAttachments;
-  switchChatSession(state, nextSessionKey);
+  void switchChatSession(state, nextSessionKey);
   state.chatMessage = preservedDraft;
   state.chatAttachments = preservedAttachments;
   return true;
diff --git a/ui/src/ui/app-render.ts b/ui/src/ui/app-render.ts
index 87e58041df2..0dbee16c4e1 100644
--- a/ui/src/ui/app-render.ts
+++ b/ui/src/ui/app-render.ts
@@ -214,7 +214,7 @@ let pendingUpdate: (() => void) | undefined;
 
 const notifyLazyViewChanged = () => pendingUpdate?.();
 
-function runUiTask<Args extends unknown[]>(
+function runUiTask<Args extends readonly unknown[]>(
   task: (...args: Args) => Promise<unknown>,
 ): (...args: Args) => void {
   return (...args) => {
@@ -423,7 +423,7 @@ function renderSidebarRecentSession(state: AppViewState, row: GatewaySessionRow)
         }
         event.preventDefault();
         if (row.key !== state.sessionKey) {
-          switchChatSession(state, row.key);
+          void switchChatSession(state, row.key);
         }
         state.setTab("chat" as import("./navigation.ts").Tab);
       }}
@@ -793,9 +793,9 @@ function applySkillWorkshopReviewState<T extends SkillWorkshopReviewableProposal
   }));
 }
 
-function rememberSkillWorkshopProposalReviewed<T extends SkillWorkshopReviewableProposal>(
+function rememberSkillWorkshopProposalReviewed(
   reviewedKeys: string[],
-  proposal: T,
+  proposal: SkillWorkshopReviewableProposal,
 ): string[] {
   const key = skillWorkshopReviewKey(proposal);
   if (reviewedKeys.includes(key)) {
@@ -2423,12 +2423,17 @@ export function renderApp(state: AppViewState) {
                       <div class="nav-section__items">
                         ${group.tabs
                           .filter((tab) => !isChildTab(tab))
-                          .flatMap((tab) => [
-                            renderTab(state, tab, { collapsed: navCollapsed }),
-                            ...childTabsOf(tab).map((child) =>
-                              renderTab(state, child, { collapsed: navCollapsed, child: true }),
-                            ),
-                          ])}
+                          .flatMap((tab) => {
+                            const renderedTabs = [
+                              renderTab(state, tab, { collapsed: navCollapsed }),
+                            ];
+                            for (const child of childTabsOf(tab)) {
+                              renderedTabs.push(
+                                renderTab(state, child, { collapsed: navCollapsed, child: true }),
+                              );
+                            }
+                            return renderedTabs;
+                          })}
                       </div>
                     </section>
                   `;
@@ -2594,7 +2599,7 @@ export function renderApp(state: AppViewState) {
               onSettingsChange: (next) => state.applySettings(next),
               onPasswordChange: (next) => (state.password = next),
               onSessionKeyChange: (next) => {
-                switchChatSession(state, next);
+                void switchChatSession(state, next);
               },
               onToggleGatewayTokenVisibility: () => {
                 state.overviewShowGatewayToken = !state.overviewShowGatewayToken;
@@ -2803,7 +2808,7 @@ export function renderApp(state: AppViewState) {
                   }
                 }),
                 onNavigateToChat: (sessionKey) => {
-                  switchChatSession(state, sessionKey);
+                  void switchChatSession(state, sessionKey);
                   state.setTab("chat" as import("./navigation.ts").Tab);
                 },
                 onAddToWorkboard:
@@ -2827,7 +2832,7 @@ export function renderApp(state: AppViewState) {
                     checkpointId,
                   );
                   if (nextKey) {
-                    switchChatSession(state, nextKey);
+                    void switchChatSession(state, nextKey);
                     state.setTab("chat" as import("./navigation.ts").Tab);
                   }
                 }),
@@ -2852,7 +2857,7 @@ export function renderApp(state: AppViewState) {
                 agentsList: state.agentsList,
                 sessions: state.sessionsResult?.sessions ?? [],
                 onOpenSession: (sessionKey) => {
-                  switchChatSession(state, sessionKey);
+                  void switchChatSession(state, sessionKey);
                   state.setTab("chat" as import("./navigation.ts").Tab);
                 },
                 onRequestUpdate: requestHostUpdate,
@@ -2986,7 +2991,7 @@ export function renderApp(state: AppViewState) {
                   await loadCronRuns(state, state.cronRunsJobId);
                 }),
                 onNavigateToChat: (sessionKey) => {
-                  switchChatSession(state, sessionKey);
+                  void switchChatSession(state, sessionKey);
                   state.setTab("chat" as import("./navigation.ts").Tab);
                 },
               }),
@@ -3384,8 +3389,10 @@ export function renderApp(state: AppViewState) {
               );
               const currentIndex = visibleProposals.findIndex((p) => p.key === selectedKey);
               const goto = (offset: number) => {
-                if (visibleProposals.length === 0) return;
-                const idx = currentIndex < 0 ? 0 : currentIndex;
+                if (visibleProposals.length === 0) {
+                  return;
+                }
+                const idx = Math.max(0, currentIndex);
                 const next = (idx + offset + visibleProposals.length) % visibleProposals.length;
                 const proposal = visibleProposals[next];
                 selectSkillWorkshopProposal(state, proposal.key);
@@ -3583,7 +3590,7 @@ export function renderApp(state: AppViewState) {
                 renderChat({
                   sessionKey: state.sessionKey,
                   onSessionKeyChange: (next) => {
-                    switchChatSession(state, next);
+                    void switchChatSession(state, next);
                   },
                   thinkingLevel: state.chatThinkingLevel,
                   showThinking,
@@ -3698,14 +3705,14 @@ export function renderApp(state: AppViewState) {
                   currentAgentId: resolvedAgentId ?? "main",
                   fullMessageAgentId: scopedAgentParamsForSession(state, state.sessionKey).agentId,
                   onAgentChange: (agentId: string) => {
-                    switchChatSession(state, buildAgentMainSessionKey({ agentId }));
+                    void switchChatSession(state, buildAgentMainSessionKey({ agentId }));
                   },
                   onNavigateToAgent: () => {
                     state.agentsSelectedId = resolvedAgentId;
                     state.setTab("agents" as import("./navigation.ts").Tab);
                   },
                   onSessionSelect: (key: string) => {
-                    switchChatSession(state, key);
+                    void switchChatSession(state, key);
                   },
                   showNewMessages: state.chatNewMessagesBelow && !state.chatManualRefreshInFlight,
                   onScrollToBottom: () => state.scrollToBottom(),
@@ -3821,7 +3828,7 @@ export function renderApp(state: AppViewState) {
               onRefresh: refreshDreaming,
               onSelectAgent: (agentId: string) => {
                 state.selectedAgentId = agentId;
-                switchChatSession(state, resolvePreferredSessionForAgent(state, agentId));
+                void switchChatSession(state, resolvePreferredSessionForAgent(state, agentId));
                 void loadDreamingStatus(state);
                 void loadDreamDiary(state);
               },
diff --git a/ui/src/ui/chat/grouped-render.test.ts b/ui/src/ui/chat/grouped-render.test.ts
index c756588d0e5..8075ee73224 100644
--- a/ui/src/ui/chat/grouped-render.test.ts
+++ b/ui/src/ui/chat/grouped-render.test.ts
@@ -106,7 +106,10 @@ vi.mock("../tool-display.ts", () => ({
     icon: "zap",
     detail:
       args && typeof args === "object" && ("detail" in args || "action" in args)
-        ? String((args as { detail?: unknown; action?: unknown }).detail ?? args.action)
+        ? String(
+            (args as { detail?: unknown; action?: unknown }).detail ??
+              (args as { action?: unknown }).action,
+          )
         : undefined,
   }),
 }));
diff --git a/ui/src/ui/components/file-preview-modal.ts b/ui/src/ui/components/file-preview-modal.ts
index 5116d06fef3..3280c7aebb8 100644
--- a/ui/src/ui/components/file-preview-modal.ts
+++ b/ui/src/ui/components/file-preview-modal.ts
@@ -467,13 +467,13 @@ export class OpenClawFilePreviewModal extends LitElement {
   }
 
   private filterFiles(): FilePreviewModalFile[] {
-    const query = this.query.trim().toLowerCase();
-    if (!query) {
+    const normalizedQuery = this.query.trim().toLowerCase();
+    if (!normalizedQuery) {
       return this.files;
     }
     return this.files.filter((file) => {
       const haystack = `${file.path}\n${file.contents}`.toLowerCase();
-      return haystack.includes(query);
+      return haystack.includes(normalizedQuery);
     });
   }
 
@@ -492,12 +492,12 @@ export class OpenClawFilePreviewModal extends LitElement {
   }
 
   private handleQueryInput = (event: Event) => {
-    const query = (event.target as HTMLInputElement).value ?? "";
+    const nextQuery = (event.target as HTMLInputElement).value ?? "";
     this.dispatchEvent(
       new CustomEvent<string>("file-preview-query-change", {
         bubbles: true,
         composed: true,
-        detail: query,
+        detail: nextQuery,
       }),
     );
   };
@@ -518,9 +518,7 @@ export class OpenClawFilePreviewModal extends LitElement {
         return;
       case "ArrowUp":
         this.moveSelection(-1, event);
-        return;
       default:
-        return;
     }
   };
 
diff --git a/ui/src/ui/public-assets.ts b/ui/src/ui/public-assets.ts
index 67967318cc3..6ccd78ab7d4 100644
--- a/ui/src/ui/public-assets.ts
+++ b/ui/src/ui/public-assets.ts
@@ -10,7 +10,7 @@ export type ControlUiPublicAsset =
 
 type WindowWithControlUiBasePath = Window &
   typeof globalThis & {
-    __OPENCLAW_CONTROL_UI_BASE_PATH__?: string;
+    [key: string]: unknown;
   };
 
 export function controlUiPublicAssetPath(
@@ -40,7 +40,7 @@ function readConfiguredBasePath(): string | null {
   if (typeof window === "undefined") {
     return null;
   }
-  const value = (window as WindowWithControlUiBasePath).__OPENCLAW_CONTROL_UI_BASE_PATH__;
+  const value = (window as WindowWithControlUiBasePath)["__OPENCLAW_CONTROL_UI_BASE_PATH__"];
   return typeof value === "string" ? value : null;
 }
 
diff --git a/ui/src/ui/views/chat.test.ts b/ui/src/ui/views/chat.test.ts
index a53b5c0adb7..c0d47be951c 100644
--- a/ui/src/ui/views/chat.test.ts
+++ b/ui/src/ui/views/chat.test.ts
@@ -2091,7 +2091,7 @@ describe("chat session controls", () => {
       ]),
     );
 
-    switchChatSession(state, "agent:ops:main");
+    void switchChatSession(state, "agent:ops:main");
     expect(state.chatSessionPickerResult).toBeNull();
     expect(state.chatSessionPickerAppliedQuery).toBe("");
 
diff --git a/ui/src/ui/views/config-quick.test.ts b/ui/src/ui/views/config-quick.test.ts
index 7dcbcbc3017..2370db983e1 100644
--- a/ui/src/ui/views/config-quick.test.ts
+++ b/ui/src/ui/views/config-quick.test.ts
@@ -256,7 +256,7 @@ describe("renderQuickSettings", () => {
     );
 
     expect(container.querySelector(".qs-assistant-avatar")?.getAttribute("src")).toBe(
-      "apple-touch-icon.png",
+      "/apple-touch-icon.png",
     );
     expect(expectAssistantAvatarSource(container)).toEqual({
       label: "IDENTITY.md",
diff --git a/ui/src/ui/views/skill-workshop.ts b/ui/src/ui/views/skill-workshop.ts
index 4b75f447820..2979164a74f 100644
--- a/ui/src/ui/views/skill-workshop.ts
+++ b/ui/src/ui/views/skill-workshop.ts
@@ -566,6 +566,11 @@ function resolveBoardEmptyState(props: SkillWorkshopProps): {
         body: "Skill Workshop proposals will appear here when your agent drafts them.",
       };
   }
+  return {
+    icon: "search",
+    title: "No proposals here",
+    body: "Skill Workshop proposals will appear here when your agent drafts them.",
+  };
 }
 
 function renderEmptyStateIcon(icon: SkillWorkshopEmptyIcon) {
@@ -614,6 +619,7 @@ function renderEmptyStateIcon(icon: SkillWorkshopEmptyIcon) {
         </svg>
       `;
   }
+  return nothing;
 }
 
 function renderWorkshopEmptyState(props: SkillWorkshopProps) {