feat(chat): rebuild the group profile on the profile refresh

.claude/plans/2026-10-06-group-profile-refresh.md

@@ -0,0 +1,31 @@
+# Group profile refresh (iOS)
+
+Spec: `docs/specs/group-profile-refresh.md` in the orchestrator root, sections "Approved new pieces"
+and "Group profile screen". Figma file Jxf2wD9QyfKaONbhHSdU0K: node 10913:358 (profile), 10918:203
+(host view), 10935:202/10935:263 (leave), 11001:1674 (share), 10913:246/282/318 (gate states).
+
+## Where things live
+
+- `ChatProfileScreen.swift` — the screen. Same shape as `UserProfileScreen`: `ProfileHeaderView`
+  with `.group(conversationID, picture: coverPicture)`, ⋯ menu in the system toolbar, pinned
+  actions in `scrollEdgeBar(.bottom)`.
+- `GroupProfileState.swift` — the pure logic, tested in `GroupProfileStateTests`:
+  - `GroupProfileCTA.resolve(gate:isMember:)` reads the `ConversationGate` verdicts directly.
+    `conversationGatePresentation` ignores membership, so it would tell a member who fell under the
+    join minimum to "Buy … to Join".
+  - `GroupBalanceRequirements` — Join is the first listener minimum; Chat is the first speaker
+    minimum, falling back to Join (backend: speaker rules equal listener rules when none are set).
+  - `balanceShortfall(of:mint:holdings:rates:)` — the Buy button names the shortfall, the line
+    above it the full requirement. Held balance comes from `heldBalance(in:session:)`, extracted
+    from `unmetBalance` in `ConversationGate.swift` so the two can't disagree.
+- `GroupChattingGrid.swift` — Chatting grid and host wave badge. Fed by `sampleChatters` only, no
+  per-chatter GetProfile. Hidden for private groups (the RPC is DENIED) and for an empty sample.
+
+## Decisions
+
+- Join and Open Chat pop back to the conversation: the only entry is `ConversationScreen.swift:154`,
+  and that screen loads its transcript when the gate stops obscuring it.
+- Overflow: Invite and Mute for members, Report and Encryption for everyone. Edit moved to an
+  "Edit Group" capsule in the header row.
+- Share sheet "Share on Flipcash" opens `GroupInviteSheet`; Copy Link copies `groupChatInvite`.
+- `ChatMuteRow` and `ReportRow` had no other callers and were removed.

Flipcash/Core/Screens/Conversation/ConversationGate.swift

@@ -232,13 +232,19 @@ private func unmetBalance(
     }
     // The contract allows at most one mint today; empty means every mint counts.
     let mint = requirement.mints.first
-    let held = mint.map { session.balance(for: $0)?.usdf ?? .usd(0) } ?? session.totalBalance.usdfValue
-    guard held.roundedToSmallestUnit() >= required else {
+    guard heldBalance(in: mint, session: session).roundedToSmallestUnit() >= required else {
         return .minimumBalance(amount: requirement.amount, mint: mint)
     }
     return nil
 }
 
+/// What the user holds toward a balance requirement, in USD: the one mint's holding when the
+/// requirement names one, else every holding together.
+@MainActor
+func heldBalance(in mint: PublicKey?, session: some ConversationGateReading) -> FiatAmount {
+    mint.map { session.balance(for: $0)?.usdf ?? .usd(0) } ?? session.totalBalance.usdfValue
+}
+
 /// Picks the requirement to name: the first unmet minimum balance, since it is
 /// the only one a user can act on, falling back to the first unmet rule.
 private func verdict(for unmet: [ConversationGateRequirement]) -> ConversationGateVerdict {

Flipcash/Core/Screens/Profile/ChatMuteStatusLabel.swift

@@ -9,13 +9,13 @@ import SwiftUI
 import FlipcashCore
 import FlipcashUI
 
-/// What the chat's mute currently is, drawn under the title on both chat settings surfaces —
+/// What the chat's mute currently is, drawn in the action row of both profile headers —
 /// "Muted until 5:56 PM" for a timed mute, plain "Muted" for an indefinite one, and nothing at all
 /// while the chat is audible.
 ///
 /// Stating the deadline is what makes a timed mute trustworthy: without it a timed mute can't be
 /// told apart from an indefinite one, and the user has no way to know when the chat comes back.
-/// It sits here rather than on ``ChatMuteRow`` because the row has no room for it.
+/// The Mute action itself lives in the ⋯ menu, which has no room to say it.
 ///
 /// Drawn as a chip rather than as another line of secondary text: the lines above it are the chat's
 /// own identity — its name, its size, when someone joined — and this is the viewer's setting. Given