feat(bot): support no-TP levelling chars (cold-plains-only grinder)

- on_init: cold-plains-only profiles skip town-marker detection and start
  directly (char is already standing in A1 town), same as run_level-only
- on_end_run: chars with no teleport at all (pre-clvl-18) walk back to
  town instead of failing on TP; _walk_back_to_town() walks south in
  steps checking for town markers, then maintenance's open_wp()
  re-detects the physical act and traverses from there

Enables the bloodmoor profile: lvl 1 sorc firebolt grinder that walks
out to Cold Plains, scans for enemies, kills, and walks back.

src/bot.py

@@ -331,6 +331,15 @@ class Bot:
             self._curr_loc = Location.A1_TOWN_START
             self.trigger_or_stop("skip_to_level")
             return
+        # Same for a cold-plains-only grinder (e.g. the bloodmoor lvl 1 sorc):
+        # the character is already standing in A1 town, so skip the town marker
+        # scan and go straight to the run.
+        if list(self._do_runs.keys()) == ["run_cold_plains"]:
+            Logger.info("Cold Plains run only - skipping town detection, starting directly")
+            self._curr_loc = Location.A1_TOWN_START
+            self._spawn_act = Location.A1_TOWN_START
+            self.trigger_or_stop("skip_to_level")
+            return
         transition_to_screens = Bot._rebuild_as_asset_to_trigger({
             "select_character": main_menu.MAIN_MENU_MARKERS,
             "start_from_town": town_manager.TOWN_MARKERS,
@@ -896,9 +905,32 @@ class Bot:
         # TP failed twice
         Logger.warning("TP to town failed twice, trying to walk back")
         set_pause_state(True)
+        # No TP at all (e.g. a pre-clvl-18 levelling char): walk back to town.
+        # The next maintenance's open_wp() re-detects the physical act and
+        # traverses from wherever the character actually is, so this works
+        # from anywhere in A1.
+        if not self._char.capabilities.can_teleport_natively and not self._char.capabilities.can_teleport_with_charges:
+            Logger.info("No teleport available - walking back to town")
+            self._walk_back_to_town()
+            self._curr_loc = self._verify_town_location(self._curr_loc if isinstance(self._curr_loc, str) else None)
+            self.trigger_or_stop("maintenance")
+            return
         self._curr_loc = self._verify_town_location(self._curr_loc if isinstance(self._curr_loc, str) else None)
         self.trigger_or_stop("maintenance")
 
+    def _walk_back_to_town(self, max_steps: int = 24):
+        """Walk south (town is south of the A1 outdoor areas) until a town
+        marker is visible. Used when the character has no teleport at all."""
+        from screen import convert_abs_to_monitor
+        for i in range(max_steps):
+            if self._town_manager.detect_current_act(timeout=1.5):
+                Logger.info(f"Walk-back: town markers visible after {i + 1} step(s)")
+                return
+            pos_m = convert_abs_to_monitor((random.randint(-40, 40), 120 + random.randint(0, 60)))
+            self._char.walk(pos_m, force_move=True)
+            wait(1.0, 1.6)
+        Logger.warning(f"Walk-back: no town marker after {max_steps} steps - continuing anyway")
+
     # All the runs go here
     # ==================================
     def _save_error_screenshot(self, run_name: str, reason: str):