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/FlowSession/FlowCommand.swift

@@ -20,8 +20,8 @@ public struct FlowCommand: Codable, Equatable, Sendable {
         case submitAIQuestion
     }
 
-    /// Wire version that includes managed-gateway AI task intent.
-    public static let currentProtocolVersion = 6
+    /// Wire version that includes managed-gateway request purpose.
+    public static let currentProtocolVersion = 7
 
     public let protocolVersion: Int
     public let sessionId: UUID
@@ -43,6 +43,8 @@ public struct FlowCommand: Codable, Equatable, Sendable {
     public let aiQuestionText: String?
     /// Fine-grained managed-gateway intent for AI question submissions.
     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?
     /// Absolute wall-clock deadlines survive extension reconstruction.
@@ -65,6 +67,7 @@ public struct FlowCommand: Codable, Equatable, Sendable {
         aiConversationID: UUID? = nil,
         aiQuestionText: String? = nil,
         aiTaskKind: ManagedGatewayTaskKind? = nil,
+        managedRequestPurpose: ManagedGatewayRequestPurpose? = nil,
         aiThinkingEnabled: Bool? = nil,
         startDeadlineAt: TimeInterval? = nil,
         processingDeadlineAt: TimeInterval? = nil
@@ -84,6 +87,7 @@ public struct FlowCommand: Codable, Equatable, Sendable {
         self.aiConversationID = aiConversationID
         self.aiQuestionText = aiQuestionText
         self.aiTaskKind = aiTaskKind
+        self.managedRequestPurpose = managedRequestPurpose
         self.aiThinkingEnabled = aiThinkingEnabled
         self.startDeadlineAt = startDeadlineAt
         self.processingDeadlineAt = processingDeadlineAt