Merge nucleic/bold-thistle-marten-19eu into dev

Sources/NucleicApp/SessionDetailView.swift

@@ -271,7 +271,9 @@ struct SessionDetailView: View {
                 .padding(.vertical, 10)
                 .chatColumn(maxWidth: contentMaxWidth, inset: transcriptInset, resizeWidth: columnWidth, settling: transcriptSettling)
             }
-            Divider().chatColumn(maxWidth: contentMaxWidth, inset: transcriptInset, resizeWidth: columnWidth, settling: transcriptSettling)
+            // No divider above the composer: it's a self-contained Liquid Glass card now, and a
+            // full-width rule flush against its top edge reads as a stray second border (the
+            // same reason the approval cards above go without one). The gap does the separating.
             composer
         }
         // Mirror the column's live width so the composer/divider/approval column (which live
@@ -2915,11 +2917,27 @@ struct SessionDetailView: View {
             // archived chat — only Unarchive stays live.
             .disabled(isArchived)
         }
-        .padding(.top, 22)
-        .padding(.bottom, 12)
+        // Card padding — the chrome inside the glass, in place of the bare top/bottom insets the
+        // divider-ruled strip used to carry.
+        .padding(.horizontal, 14)
+        .padding(.vertical, 12)
+        // Backed by the system Liquid Glass material, exactly like the floating new-chat
+        // composer: the input area reads as one card sitting over the pane, sampling and
+        // refracting what's behind it instead of being a flat slab ruled off by a divider.
+        .glassEffect(.regular, in: .rect(cornerRadius: 16))
+        // The glass renders but doesn't hit-test, so give the card a solid hit shape — clicks
+        // in the empty space between its controls belong to the composer, not to whatever sits
+        // underneath (and the shape also focuses the field-adjacent gaps predictably).
+        .contentShape(.rect(cornerRadius: 16))
+        // A soft drop shadow lifts the card off the transcript, matching the floating panel's
+        // treatment at a calmer weight — this one is always on screen.
+        .shadow(color: .black.opacity(0.18), radius: 10, x: 0, y: 3)
         // Match the transcript's centered column so the input area and its
         // accessories never extend wider than the chat text above them.
         .chatColumn(maxWidth: contentMaxWidth, inset: transcriptInset, resizeWidth: columnWidth, settling: transcriptSettling)
+        // Float the card off the transcript above and the pane's bottom edge below.
+        .padding(.top, 10)
+        .padding(.bottom, 12)
         // Stream this composer's draft to the mesh (throttled in the store) so every other
         // device viewing this chat sees it live and locks its own composer; an emptied field —
         // including the clear in `send()` — ends the typing and unlocks them.