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/atmi_pivoti.svg

@@ -8,9 +8,9 @@
   <text x="34" y="80" fill="#333" style="font-family:monospace;font-size:11px">R1  = 2 x PP - L = 2 x 95.80 - 90.40 = 101.20</text>
   <rect x="42.5" y="116.0" width="355.0" height="151.2" fill="#777" fill-opacity="0.08" stroke="#777" stroke-width="1"/>
   <rect x="394.5" y="126.4" width="195.0" height="68.0" fill="#1a5fb4" fill-opacity="0.08" stroke="#1a5fb4" stroke-width="1"/>
-  <line x1="24" y1="189.0" x2="706" y2="189.0" stroke="#7b2fbf" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <line x1="24.0" y1="189.0" x2="706" y2="189.0" stroke="#7b2fbf" stroke-width="1.5" stroke-dasharray="4 3"/>
   <text x="692" y="183.0" fill="#7b2fbf" text-anchor="end">PPQ 95.80 — zona 1</text>
-  <line x1="24" y1="254.0" x2="706" y2="254.0" stroke="#188a3e" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <line x1="24.0" y1="254.0" x2="706" y2="254.0" stroke="#188a3e" stroke-width="1.5" stroke-dasharray="4 3"/>
   <text x="692" y="248.0" fill="#188a3e" text-anchor="end">SQ 90.80 — zona 2</text>
   <line x1="52.0" y1="183.2" x2="52.0" y2="197.5" stroke="#1a1a1a" stroke-width="1.2"/>
   <rect x="47.5" y="186.4" width="9" height="7.8" fill="#c00"/>