feat(app): add resilient Flow recovery and privacy-safe analytics

Unify PiP recovery across startup and foreground transitions, surface actionable status, and add privacy-safe analytics plus the refreshed onboarding and account experience. Update documentation assets and advance the release build to 84.

OSGKeyboardShared/Models/FlowUtteranceRequest.swift

@@ -15,6 +15,8 @@ public struct FlowUtteranceRequest: Equatable, Sendable {
     public let aiQuestionText: String?
     /// Fine-grained managed-gateway intent. Regular questions keep the default.
     public let aiTaskKind: ManagedGatewayTaskKind?
+    /// Optional server-audited purpose for managed gateway billing policy.
+    public let managedRequestPurpose: ManagedGatewayRequestPurpose?
     /// Clipboard-skill thinking override. Nil keeps AI-mode default (on).
     public let aiThinkingEnabled: Bool?
 
@@ -28,6 +30,7 @@ public struct FlowUtteranceRequest: Equatable, Sendable {
         aiConversationID: UUID? = nil,
         aiQuestionText: String? = nil,
         aiTaskKind: ManagedGatewayTaskKind? = nil,
+        managedRequestPurpose: ManagedGatewayRequestPurpose? = nil,
         aiThinkingEnabled: Bool? = nil
     ) {
         self.mode = mode
@@ -37,6 +40,7 @@ public struct FlowUtteranceRequest: Equatable, Sendable {
         self.aiConversationID = aiConversationID
         self.aiQuestionText = aiQuestionText
         self.aiTaskKind = aiTaskKind
+        self.managedRequestPurpose = managedRequestPurpose
         self.aiThinkingEnabled = aiThinkingEnabled
     }