feat: center square Hope presence and guide secure certificate setup

Tests/ConversationStateTests.swift

@@ -85,6 +85,39 @@ struct ConversationStateTests {
         #expect(!model.isThinkingChipVisible)
     }
 
+    @Test("square LED presence responds to input and emphasizes assistant output")
+    func ledPresenceAudioResponse() {
+        let quiet = LightwellView.dot(row: 10, column: 10, phase: .listening(level: 0), time: 0, reduceMotion: false)
+        let listening = LightwellView.dot(row: 10, column: 10, phase: .listening(level: 0.8), time: 0, reduceMotion: false)
+        let speaking = LightwellView.dot(row: 10, column: 10, phase: .speaking(level: 0.8), time: 0, reduceMotion: false)
+        #expect(listening.opacity > quiet.opacity)
+        #expect(listening.scale > quiet.scale)
+        #expect(speaking.opacity > listening.opacity)
+        #expect(speaking.scale > listening.scale)
+    }
+
+    @Test("LED reduce motion freezes audio geometry and pending waves")
+    func ledReduceMotion() {
+        for phase: LightwellView.Phase in [.connecting, .thinking, .speaking(level: 0.8)] {
+            #expect(LightwellView.dot(row: 8, column: 9, phase: phase, time: 0, reduceMotion: true)
+                == LightwellView.dot(row: 8, column: 9, phase: phase, time: 7, reduceMotion: true))
+        }
+        #expect(LightwellView.dot(row: 10, column: 10, phase: .listening(level: 0), time: 0, reduceMotion: true)
+            == LightwellView.dot(row: 10, column: 10, phase: .listening(level: 1), time: 0, reduceMotion: true))
+    }
+
+    @Test("LED state patterns are distinct and invalid signal levels remain bounded")
+    func ledStatePatterns() {
+        let dormant = LightwellView.dot(row: 10, column: 10, phase: .idle, time: 0, reduceMotion: false)
+        let thinking = LightwellView.dot(row: 10, column: 10, phase: .thinking, time: 0, reduceMotion: true)
+        #expect(thinking.opacity > dormant.opacity)
+        for level in [Double.nan, Double.infinity, -1, 10] {
+            let dot = LightwellView.dot(row: 10, column: 10, phase: .speaking(level: level), time: 0, reduceMotion: false)
+            #expect(dot.opacity.isFinite && (0...1).contains(dot.opacity))
+            #expect(dot.scale.isFinite && dot.scale >= 1)
+        }
+    }
+
     // MARK: - Interruption begin mute decision (Iteration 08 Item 1)
 
     /// Pure decision seam test: verifies that the interruption-begin mute