style: fix strict clippy and TypeScript type errors

- Fix assertions on constants in clipboard.rs (use const blocks)
- Fix unnecessary unwrap after is_ok check in git.rs
- Remove redundant u64 >= 0 comparison in stats.rs
- Add #[allow(clippy::useless_vec)] to sorting tests
- Add missing beforeEach import to vitest.setup.ts
- Change global.Audio to globalThis.Audio in notifications.test.ts
- Add type annotations to fix null type narrowing in conversations.test.ts

src-tauri/src/clipboard.rs

@@ -408,13 +408,15 @@ mod tests {
     #[test]
     fn test_max_history_size_is_reasonable() {
         assert_eq!(MAX_HISTORY_SIZE, 100);
-        assert!(MAX_HISTORY_SIZE > 0);
-        assert!(MAX_HISTORY_SIZE <= 1000); // Sanity check
+        // Compile-time assertions for constant bounds
+        const _: () = assert!(MAX_HISTORY_SIZE > 0);
+        const _: () = assert!(MAX_HISTORY_SIZE <= 1000); // Sanity check
     }
 
     // ==================== Pinned entry sorting tests ====================
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_pinned_entries_sorting() {
         let mut entries = vec![
             ClipboardEntry {
@@ -464,6 +466,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_multiple_pinned_entries_sorting() {
         let mut entries = vec![
             ClipboardEntry {

src-tauri/src/git.rs

@@ -733,8 +733,8 @@ mod tests {
 
         let result = git_log(working_dir, Some(10));
         // May fail on empty repo or return empty
-        if result.is_ok() {
-            assert!(result.unwrap().is_empty());
+        if let Ok(commits) = result {
+            assert!(commits.is_empty());
         }
     }
 

src-tauri/src/quick_actions.rs

@@ -247,6 +247,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_quick_action_sorting_defaults_first() {
         let mut actions = vec![
             create_test_action("custom-z", "Zebra", false),
@@ -354,6 +355,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_action_find_by_id() {
         let actions = vec![
             create_test_action("action-1", "First", false),

src-tauri/src/sessions.rs

@@ -321,6 +321,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_session_sorting_by_activity() {
         let old_time = Utc.with_ymd_and_hms(2024, 1, 1, 0, 0, 0).unwrap();
         let new_time = Utc.with_ymd_and_hms(2024, 6, 15, 12, 0, 0).unwrap();

src-tauri/src/snippets.rs

@@ -281,6 +281,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_snippet_sorting_by_category_then_name() {
         let mut snippets = vec![
             create_test_snippet("s1", "Zebra", "B-Category", false),
@@ -388,6 +389,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_snippet_find_by_id() {
         let snippets = vec![
             create_test_snippet("snippet-1", "First", "Cat", false),
@@ -404,6 +406,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::useless_vec)]
     fn test_extract_categories_sorted_and_deduped() {
         let snippets = vec![
             create_test_snippet("s1", "S1", "Zebra", false),

src-tauri/src/stats.rs

@@ -523,9 +523,8 @@ mod tests {
         let mut stats = UsageStats::new();
         stats.session_start = Some(Instant::now());
 
-        // The duration should be at least 0 seconds
-        let duration = stats.get_session_duration();
-        assert!(duration >= 0);
+        // Verify duration is returned (u64 is always non-negative)
+        let _duration = stats.get_session_duration();
     }
 
     #[test]

src/lib/notifications/notifications.test.ts

@@ -23,7 +23,7 @@ class MockAudioElement {
 }
 
 // Store original Audio before mocking
-const OriginalAudio = global.Audio;
+const OriginalAudio = globalThis.Audio;
 
 describe("notifications", () => {
   describe("NotificationType enum", () => {
@@ -162,12 +162,12 @@ describe("notifications", () => {
   describe("SoundPlayer class", () => {
     beforeEach(() => {
       // Mock Audio constructor
-      global.Audio = MockAudioElement as unknown as typeof Audio;
+      globalThis.Audio = MockAudioElement as unknown as typeof Audio;
     });
 
     afterEach(() => {
       // Restore original Audio
-      global.Audio = OriginalAudio;
+      globalThis.Audio = OriginalAudio;
       vi.resetModules();
     });
 
@@ -232,12 +232,12 @@ describe("notifications", () => {
 
   describe("NotificationManager class", () => {
     beforeEach(() => {
-      global.Audio = MockAudioElement as unknown as typeof Audio;
+      globalThis.Audio = MockAudioElement as unknown as typeof Audio;
       vi.resetModules();
     });
 
     afterEach(() => {
-      global.Audio = OriginalAudio;
+      globalThis.Audio = OriginalAudio;
     });
 
     it("can import notificationManager singleton", async () => {

src/lib/stores/conversations.test.ts

@@ -328,7 +328,7 @@ describe("scroll position handling", () => {
   });
 
   it("uses positive values for manual scroll position", () => {
-    const scrollPosition = 500;
+    const scrollPosition: number = 500;
     const isAutoScroll = scrollPosition === -1;
 
     expect(isAutoScroll).toBe(false);
@@ -461,7 +461,7 @@ describe("derived store behavior", () => {
   });
 
   it("defaults to disconnected when no active conversation", () => {
-    const activeConv = null;
+    const activeConv = null as { connectionStatus?: string } | null;
     const derivedStatus = activeConv?.connectionStatus || "disconnected";
 
     expect(derivedStatus).toBe("disconnected");
@@ -480,7 +480,7 @@ describe("derived store behavior", () => {
   });
 
   it("defaults to empty array when no active conversation", () => {
-    const activeConv = null;
+    const activeConv = null as { terminalLines?: Array<{ id: string; content: string }> } | null;
     const derivedLines = activeConv?.terminalLines || [];
 
     expect(derivedLines).toEqual([]);

vitest.setup.ts

@@ -1,5 +1,5 @@
 import "@testing-library/jest-dom/vitest";
-import { vi } from "vitest";
+import { vi, beforeEach } from "vitest";
 
 // Mock Tauri invoke API
 const mockInvokeResults: Record<string, unknown> = {};