Fix cropping of message bubble cropping on linux

desktop-client/chat_widgets.py

@@ -1,6 +1,6 @@
 from PyQt6.QtWidgets import (
     QWidget, QVBoxLayout, QHBoxLayout, QLabel, QFrame,
-    QMainWindow
+    QMainWindow, QSizePolicy
 )
 from PyQt6.QtCore import Qt, pyqtSignal
 
@@ -14,6 +14,13 @@ class ChatBubble(QWidget):
         # Container for the actual bubble
         self.bubble = QFrame()
         self.bubble.setObjectName("bubble")
+        # Preferred/Preferred: bubble sizes to its content but doesn't
+        # expand to fill all available horizontal space (fixes Linux layout).
+        self.bubble.setSizePolicy(
+            QSizePolicy.Policy.Preferred,
+            QSizePolicy.Policy.Preferred,
+        )
+        self.bubble.setMaximumWidth(420)
         
         bg_color = "#0084FF" if is_self else "#2a2a2e"
         text_color = "#FFFFFF"
@@ -35,9 +42,17 @@ class ChatBubble(QWidget):
         author_lbl.setStyleSheet(f"color: {author_color}; font-weight: bold; font-size: 11px; background: transparent;")
         bubble_layout.addWidget(author_lbl)
         
-        # Text
+        # Text — on Linux, word-wrapping QLabels inside HBoxLayouts can
+        # overflow their parent's painted area.  Setting Preferred + minimum
+        # width of 0 lets the label wrap within whatever space the bubble
+        # actually receives rather than expanding the bubble outward.
         self.text_lbl = QLabel(text)
         self.text_lbl.setWordWrap(True)
+        self.text_lbl.setMinimumWidth(0)
+        self.text_lbl.setSizePolicy(
+            QSizePolicy.Policy.Preferred,
+            QSizePolicy.Policy.Preferred,
+        )
         self.text_lbl.setStyleSheet(f"color: {text_color}; font-size: 13px; border: none; background: transparent;")
         self.text_lbl.setOpenExternalLinks(False)
         self.text_lbl.linkActivated.connect(on_link_clicked)