[RavSinghChandan]

In layout mode, a Tf operator without its size operand (/F1 Tf) made extract_text() raise IndexError, and so did a bare Tf with no operands at all. Plain mode already handles both.

Now a missing or non-numeric size keeps the current font size, and a missing font name resolves to the same placeholder font as an unknown one (see resolve_font()), so the rest of the page is still extracted. The two call sites share a small helper, set_font_operation().

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.19%. Comparing base (32fd5fb) to head (52fda5a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4228   +/-   ##
=======================================
  Coverage   98.18%   98.19%           
=======================================
  Files          59       59           
  Lines       11820    11827    +7     
  Branches     2226     2226           
=======================================
+ Hits        11606    11613    +7     
  Misses        118      118           
  Partials       96       96           

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