fix(char): guard walk() against HUD clicks too, and set a >=5h session budget

walk() carried the identical unguarded click that move() had:

    x, y = convert_abs_to_monitor(pos_abs)
    mouse.move(x, y, randomize=5, ...)

Same fix, same ordering: jitter first via _hud_safe_target, then click with
randomize=0. walk() is reached from bot.py's walk-back-to-town path and from
poison_necro, so it was a live second route to the same loot-filter toggle.

Found while verifying PR #35 had landed — grepping main for randomize= showed a
third mouse.move in i_char.py that the move()-scoped tests did not cover.

session_budget_h 10 -> 8 for a >=5h run. The value is rolled at 0.65-1.35x, so
setting 5 would AVERAGE five hours but could stop after 3.25. 8 gives a
5.2-10.8h window, which guarantees the five while keeping the variation.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

config/params.ini

@@ -227,7 +227,10 @@ skill_hesitation_max_ms = 300
 ; Raised to 10 for an overnight run: the budget is rolled at 0.65-1.35x, so 6
 ; could have stopped the bot after 3.9h and left it idle. 10 guarantees at
 ; least ~6.5h while keeping the day-to-day variation.
-session_budget_h = 10
+; Set to 8 for a >= 5h run (2026-08-28). The value is rolled at 0.65-1.35x, so
+; session_budget_h=5 would average 5h but could stop after 3.25h. 8 gives a
+; 5.2-10.8h window, guaranteeing the 5 hours while keeping day-to-day variation.
+session_budget_h = 8
 ; Small cursor movement during long idles. Between actions the cursor otherwise
 ; sits exactly where the last click left it.
 idle_drift_enabled = 1

src/char/i_char.py

@@ -309,7 +309,9 @@ class IChar:
         adjust_factor = max(max_wd, min(min_wd, dist - 50)) / max(min_wd, dist)
         pos_abs = [int(pos_abs[0] * adjust_factor), int(pos_abs[1] * adjust_factor)]
         x, y = convert_abs_to_monitor(pos_abs)
-        mouse.move(x, y, randomize=5, delay_factor=[factor*0.1, factor*0.14])
+        # Same HUD guard as move(). walk() had the identical unguarded click.
+        x, y = self._hud_safe_target((x, y), 5)
+        mouse.move(x, y, randomize=0, delay_factor=[factor*0.1, factor*0.14])
         wait(0.012, 0.02)
         if force_move:
             keyboard.send(Config().char["force_move"])