fix: keyboard stability, host-only analytics, and auto-reply dedupe

- record analytics/usage only in the host app; the extension no longer opens the
  SQLite queues, so hiding the keyboard cannot hold WAL locks (0xdead10cc)
- sync clipboard history writes across processes so deletes made on one side
  are not reverted by the other
- guard memory-relief reentrancy on controller and telemetry sides to break
  the recursive crash loop
- resolve credentials off the main thread and migrate legacy keys once per
  install, so Keychain reads cannot be caught in the suspend window
- gate Volcengine ASR ping completion to once (SIGTRAP on double resume)
- treat same-text captures as the same logical copy and dedupe auto actions
  by content fingerprint within 30s, stopping Universal Clipboard storms
- realign version line to 2.1.0 (build 110)

OSGKeyboardExtTests/ClipboardSuggestionLifecycleTests.swift

@@ -188,6 +188,47 @@ final class ClipboardSuggestionLifecycleTests: XCTestCase {
         XCTAssertNil(state.clipboardSuggestionText)
     }
 
+    func testSameTextUnderNewChangeCountIsSwallowedAsSameLogicalCopy() {
+        copy("meeting at 3pm")
+        coordinator.captureIfNeeded()
+        let firstEntry = history.newestEntry
+
+        // Universal Clipboard re-announce: same text, new changeCount.
+        pasteboard.setText("meeting at 3pm", changeCount: 12)
+        coordinator.captureIfNeeded()
+
+        XCTAssertEqual(history.entries.count, 1)
+        XCTAssertEqual(history.newestEntry?.id, firstEntry?.id)
+        XCTAssertEqual(history.newestEntry?.createdAt, firstEntry?.createdAt)
+        XCTAssertEqual(history.lastObservedChangeCount, 12)
+        XCTAssertEqual(state.clipboardSuggestionText, "meeting at 3pm")
+    }
+
+    func testRecopyAfterDifferentContentCreatesNewGeneration() {
+        copy("first message")
+        coordinator.captureIfNeeded()
+        copy("second message")
+        coordinator.captureIfNeeded()
+
+        copy("first message")
+        coordinator.captureIfNeeded()
+
+        XCTAssertEqual(history.entries.map(\.text), ["first message", "second message"])
+        XCTAssertEqual(state.clipboardSuggestionText, "first message")
+    }
+
+    func testDismissedSuggestionStaysHiddenAcrossUniversalClipboardResync() {
+        copy("dismiss me")
+        coordinator.captureIfNeeded()
+        coordinator.dismissSuggestion()
+
+        pasteboard.setText("dismiss me", changeCount: 12)
+        coordinator.captureIfNeeded()
+
+        XCTAssertNil(state.clipboardSuggestionText)
+        XCTAssertEqual(history.entries.count, 1)
+    }
+
     private func copy(_ text: String) {
         pasteboard.setText(text, changeCount: pasteboard.changeCount + 1)
     }