fix(planner): EV tolerance 'dost dobré' — konec honění posledních % do 100 %

needed_wh=0 když live_soc >= least(target,99) - charge_done_tolerance_pct (V107,
default 3 p.b.). Effective target zastropovaný na 99 (clamp) → bez věčného
mini-dobíjení a cyklování nabíječky. Ověřeno živě: session #6 needed_wh 1329→0.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

db/routines/R__038_fn_ev_session_planning_json.sql

@@ -75,6 +75,7 @@ as $fn$
       v.battery_capacity_kwh,
       v.default_target_soc_pct,
       v.opportunistic_value_czk_kwh as v_opp,
+      coalesce(v.charge_done_tolerance_pct, 3.0) as charge_done_tolerance_pct,
       ems.fn_ev_session_delivered_wh(es.charger_id, es.session_start) as live_delivered_wh
     from ems.ev_session es
     join ems.asset_ev_charger ch on ch.id = es.charger_id
@@ -103,12 +104,20 @@ as $fn$
         when coalesce(c.target_soc_pct, c.default_target_soc_pct) is null then null
         else c.target_deadline
       end,
+      -- effective target zastropovaný na 99 (clamp live_soc) → bez věčného
+      -- mini-dobíjení u plného auta. „Dost dobré" tolerance: needed=0 když je
+      -- live_soc ve vzdálenosti tolerance od targetu (nehonit poslední taper →
+      -- žádné zbytečné start/stop nabíječky). 0 = tvrdě na target.
       'energy_needed_wh', case
         when c.target_deadline is null then 0::numeric
         when coalesce(c.target_soc_pct, c.default_target_soc_pct) is null then 0::numeric
+        when c.live_soc_pct >=
+          least(coalesce(c.target_soc_pct, c.default_target_soc_pct)::numeric, 99)
+          - c.charge_done_tolerance_pct
+          then 0::numeric
         else greatest(
           0,
-          (coalesce(c.target_soc_pct, c.default_target_soc_pct)::numeric
+          (least(coalesce(c.target_soc_pct, c.default_target_soc_pct)::numeric, 99)
             - c.live_soc_pct) / 100.0
             * (c.battery_capacity_kwh * 1000)
         )