svg_candles: cautarea nivelurilor, scoasa in functie comuna; 11 generatoare reparate

Unsprezece generatoare nu mai rulau deloc la HEAD: cautau <line x1="24", iar
svg_candles scrie x1="24.0" de cand are Level.i0. Un generator mort inseamna
ca diagrama nu mai poate fi regenerata, si nimeni n-ar fi aflat pana cand ar
fi incercat cineva, peste luni.

Cele 11 copii ale aceluiasi regex au disparut: y_niveluri() si offset_render()
se agata acum de semnatura liniei de Level (stroke-width + dasharray), nu de
x-ul ei. Caz nou in selftest, cu Level(i0=) si panou de volum - combinatia la
care varianta veche fie crapa, fie prindea tacut linia de zero a volumului.

41 de SVG-uri regenerate, toate identice cu cele comise dupa normalizarea
x1=24 -> x1=24.0, deci niciun desen n-a sarit. Verificarea asta a prins o
regresie reala: la buy_doji_transe substitutia lasase scaderea veche pe randul
urmator, offsetul se scadea de doua ori si desenul urca 92 px.

Inca doua generatoare moarte din aceeasi familie, gasite pe drum
(intrarea_cazul_lui, intrarea_doua_variante): desenau peste grafic citind
ch._y() fara offset. Nu crapau zgomotos - produceau suprapuneri la 22 px.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ThN7ixZrowca8aTGrK1MUJ

gen/strategii/hammer_mbt10_mbt_close.svg

@@ -2,10 +2,10 @@
   <text x="24" y="72" fill="#333" style="font-weight:bold">MBT-10 — „în formare" nu e semnal (cifrele exemplului din material)</text>
   <rect x="442.3" y="199.5" width="49.0" height="155.4" fill="#b06000" fill-opacity="0.08" stroke="#b06000" stroke-width="1"/>
   <text x="442.3" y="194.5" fill="#b06000" style="font-weight:bold">cele două zile care contează</text>
-  <line x1="24" y1="210.9" x2="737" y2="210.9" stroke="#555" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <line x1="24.0" y1="210.9" x2="737" y2="210.9" stroke="#555" stroke-width="1.5" stroke-dasharray="4 3"/>
   <text x="723" y="204.9" fill="#555" text-anchor="end">intraday 55.30</text>
-  <line x1="24" y1="319.7" x2="737" y2="319.7" stroke="#1a5fb4" stroke-width="1.5" stroke-dasharray="4 3"/>
-  <text x="30" y="313.7" fill="#1a5fb4">locul crimei 52.10 — structura ideii</text>
+  <line x1="24.0" y1="319.7" x2="737" y2="319.7" stroke="#1a5fb4" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <text x="30.0" y="313.7" fill="#1a5fb4">locul crimei 52.10 — structura ideii</text>
   <line x1="115.8" y1="124.2" x2="115.8" y2="163.3" stroke="#1a1a1a" stroke-width="1.2"/>
   <rect x="109.3" y="132.7" width="13" height="20.4" fill="#188a3e"/>
   <line x1="141.8" y1="103.8" x2="141.8" y2="142.9" stroke="#1a1a1a" stroke-width="1.2"/>