apl: idiom corpus 34→64 + fix ≢/≡ glyph recognition (+30 tests, 445/445)

30 new source-string idioms via apl-run: triangulars, factorial,
running sum/product, parity counts, identity matrix, mult-table,
dot product, ∧.= equality, take/drop/reverse, tally, ravel,
count-of-value, etc.

Side-fix: tokenizer's apl-glyph-set was missing ≢ and ≡ — they
were silently skipped.  Added them and to apl-parse-fn-glyphs.

plans/apl-on-sx.md

@@ -127,7 +127,7 @@ and tightens loose ends.
   `A[I;J]` end-to-end; confirm parser desugars to `⌷` and runtime returns
   expected slices.  Add 5+ tests.
   _(Single-axis only — multi-axis `A[I;J]` requires semicolon parsing, deferred.)_
-- [ ] **Idiom corpus expansion** — extend `idioms.sx` from 34 to 60+ once
+- [x] **Idiom corpus expansion** — extend `idioms.sx` from 34 to 60+ once
   end-to-end works (we can express idioms as APL strings, not as runtime
   calls).  Source-string-based idioms validate the whole stack.
 - [ ] **`:Trap` / `:EndTrap`** — minimal exception machinery: `:Trap n`
@@ -149,6 +149,7 @@ data; format for string templating.
 
 _Newest first._
 
+- 2026-05-07: Phase 7 step 5 — idiom corpus 34→64 (+30 source-string idioms via apl-run); also fixed tokenizer + parser to recognize ≢ and ≡ glyphs (were silently skipped); 445/445
 - 2026-05-07: Phase 7 step 4 — bracket indexing `A[I]` desugared to `(:dyad ⌷ I A)` via maybe-bracket helper, wired into :name + :lparen branches of collect-segments-loop; multi-axis (A[I;J]) deferred (semicolon split); +7 tests; 415/415
 - 2026-05-07: Phase 7 step 3 — :quad-name end-to-end; tokenizer already produced :name "⎕FMT"; parser is-fn-tok? extended via apl-quad-fn-names; eval-ast :name dispatches ⎕IO/⎕ML/⎕FR/⎕TS to apl-quad-*; apl-monadic-fn handles ⎕FMT; ⎕← deferred (tokenizer splits ⎕←); +8 tests; 408/408
 - 2026-05-07: Phase 7 step 2 — end-to-end pipeline `apl-run : string → array` (parse-apl + apl-eval-ast against empty env); +25 source-string tests covering scalars, strands, dyadic arith, monadic primitives, operators, ∘./.g products, comparisons, famous one-liners (+/⍳10=55, ×/⍳10=10!); tokenizer can't yet parse decimals so `3.7` literal tests dropped; **400/400**