fix(tui): status bar duplicates and degrades during long sessions (#3291)

shutil.get_terminal_size() can return stale/fallback values on SSH that
differ from prompt_toolkit's actual terminal width. Fragments built for
the wrong width overflow and wrap onto a second line (wrap_lines=True
default), appearing as progressively degrading duplicates.

- Read width from get_app().output.get_size().columns when inside a
  prompt_toolkit TUI, falling back to shutil outside TUI context
- Add wrap_lines=False on the status bar Window as belt-and-suspenders
  guard against any future width mismatch

Closes #3130

Co-authored-by: Mibayy <Mibayy@users.noreply.github.com>

cli.py

@@ -1329,7 +1329,12 @@ class HermesCLI:
     def _build_status_bar_text(self, width: Optional[int] = None) -> str:
         try:
             snapshot = self._get_status_bar_snapshot()
-            width = width or shutil.get_terminal_size((80, 24)).columns
+            if width is None:
+                try:
+                    from prompt_toolkit.application import get_app
+                    width = get_app().output.get_size().columns
+                except Exception:
+                    width = shutil.get_terminal_size((80, 24)).columns
             percent = snapshot["context_percent"]
             percent_label = f"{percent}%" if percent is not None else "--"
             duration_label = snapshot["duration"]
@@ -1359,7 +1364,16 @@ class HermesCLI:
             return []
         try:
             snapshot = self._get_status_bar_snapshot()
-            width = shutil.get_terminal_size((80, 24)).columns
+            # Use prompt_toolkit's own terminal width when running inside the
+            # TUI — shutil.get_terminal_size() can return stale or fallback
+            # values (especially on SSH) that differ from what prompt_toolkit
+            # actually renders, causing the fragments to overflow to a second
+            # line and produce duplicated status bar rows over long sessions.
+            try:
+                from prompt_toolkit.application import get_app
+                width = get_app().output.get_size().columns
+            except Exception:
+                width = shutil.get_terminal_size((80, 24)).columns
             duration_label = snapshot["duration"]
 
             if width < 52:
@@ -6894,6 +6908,15 @@ class HermesCLI:
             Window(
                 content=FormattedTextControl(lambda: cli_ref._get_status_bar_fragments()),
                 height=1,
+                # Prevent fragments that overflow the terminal width from
+                # wrapping onto a second line, which causes the status bar to
+                # appear duplicated (one full + one partial row) during long
+                # sessions, especially on SSH where shutil.get_terminal_size
+                # may return stale values.  _get_status_bar_fragments now reads
+                # width from prompt_toolkit's own output object, so fragments
+                # will always fit; wrap_lines=False is the belt-and-suspenders
+                # guard against any future width mismatch.
+                wrap_lines=False,
             ),
             filter=Condition(lambda: cli_ref._status_bar_visible),
         )