[Jammy2211]

The two follow-ups from #62's remaining 90 search-only lines.

1. The matcher could not see past maths

arXiv's metadata carries the LaTeX source; a title pasted off the abstract
page carries the rendered glyphs. A plain punctuation strip never brought the
two together:

arXiv	queue	before	after
$0.5\leq z<1.0$	0.5≤z<1.0	05leqz10 ≠ 05z10	both 05z10
$\Lambda$CDM	ΛCDM	lambdacdm ≠ cdm	both cdm
$M_\star$	M⋆	mstar ≠ m	both m
$2.2\times10^{-21}$eV	2.2×10−21eV	22times1021ev ≠ 221021ev	both 221021ev

normalise_title now erases both spellings rather than translating one into
the other: LaTeX control sequences go, and so does every non-ASCII character left
after accent folding. Erasing beats a \leq→≤ table, which would need every
symbol astronomers use and would silently mismatch the day it missed one — and
the uniqueness rule in match_entries is what keeps the lossier reduction safe.

Accented Latin still survives, because NFKD leaves an ASCII base: Ekström →
ekstrom, Muñoz-Darias → munozdarias. Greek has none, and is erased on both
sides alike.

2. Five lines were damaged, not unmatched

No matcher could have rescued these:

• Chandra Observations of Spikey: … Supermassive Black Hole + Binary System —
  one title that lost its wrap, rejoined
• …the local MBH-M⋆ relationProj C — junk welded on by whatever pasted it
• __SMBH Binaries_ — a sub-heading with one trailing underscore, so it read as
  a paper
• Massive Black Holes summary: https://arxiv.org/pdf/… — a ref written after a
  colon instead of —, so it was never recognised. Now a paper with a working
  PDF button, keeping the human's own label as its title
• Two paragraph fragments pasted out of a paper's introduction (13 lines) —
  NOTE-marked by hand rather than spending 13 arXiv lookups discovering they
  are prose

Effect

	#61	#62	here
Papers waiting	232	223	208
With a 📄 PDF button	127	133	134
Search-only	105	90	74

The 208 is the honest number: the difference was never papers. The matcher
improvement is not yet reflected — it needs a backfill run against arXiv, which
I'll dispatch once this is on main.

5 new tests; 116 pass, make validate clean.

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