nav: xref jump into pseudocode lands on the referenced symbol, not column 0

The decompiler-jump column fix used fn.name (the target's containing function),
which is correct when jumping to a function's own prototype but wrong for an
xref jump to a call SITE: the token on that line is the symbol xrefs was invoked
on, not the enclosing function. So x-pane jumps landed at column 0.

Use focus_name (the xref's subject, already threaded through _goto_ea) as the
token for a mid-function target; keep fn.name for the ea == fn.addr (prototype)
case.

Verified: xrefs to sub_2060 -> pick the caller site -> lands in sub_20DD's
pseudocode on '    sub_2060(a2);' with cursor_x=4 = 'sub_2060'. Full suite
(disasm_nav/view_toggle/search/follow_xrefs/xref_labels/mouse/decomp_nav/
decomp_follow_self/rename/rename_history/listing_view/continuous_view/
func_banners) green.

1 files changed, 5 insertions, 1 deletions

diff --git a/idatui/app.py b/idatui/app.py
index beb1d47..57ee5c9 100644
--- a/idatui/app.py
+++ b/idatui/app.py
@@ -3577,9 +3577,13 @@ class IdaTui(App):
                     # Jumping to the function itself: land on its name in the
                     # prototype (line 0), not column 0.
                     dec_idx = 0
+                    token = fn.name
                 else:
+                    # A mid-function site (e.g. an xref jump to a call site):
+                    # land on the referenced symbol on that line, not column 0.
                     dec_idx = max(self._decomp_line_for(fn.addr, ea), 0)
-                col = self._decomp_col_for(fn.addr, dec_idx, fn.name)
+                    token = focus_name or fn.name
+                col = self._decomp_col_for(fn.addr, dec_idx, token) if token else 0
                 self.app.call_from_thread(
                     self._open_decomp_entry, fn.addr, fn.name, dec_idx, col, push)
                 return