Krabbe: ASCII-only, weiter sichtbar; Taucher (Scuba-Diver) neu

- Krabben-Zeichen von '°' (non-ASCII, wide-char-Problem) auf '.' umgestellt
- steps_out 14→22: Krabbe läuft weiter aus dem Schloss heraus
- add_diver(): Scuba-Taucher mit 2-Frame-Animation, Sauerstoffblasen beim Tod

asciiquarium_ng.py

@@ -301,7 +301,7 @@ class Aquarium:
 
         fns = [self.add_whale, self.add_monster, self.add_swan,
                self.add_ducks, self.add_dolphins,
-               self.add_seahorse, self.add_squid]
+               self.add_seahorse, self.add_squid, self.add_diver]
         if not self.cfg.no_ship:
             fns.append(self.add_ship)
         if not self.cfg.no_shark and not self.cfg.vegan:
@@ -1355,6 +1355,60 @@ mmmmmm
             death_cb=lambda e, aq: aq.random_object(e),
         ))
 
+    # ── Diver (Taucher) ──────────────────────────────────────────────────────
+
+    def add_diver(self, dead=None):
+        diver_r0 = _p(r"""
+  O
+\-|>
+  /\
+""")
+        diver_r1 = _p(r"""
+  O
+/-|>
+  \/
+""")
+        diver_l0 = _p(r"""
+  O
+<|-/
+ /\
+""")
+        diver_l1 = _p(r"""
+  O
+<|-\
+ \/
+""")
+        mask_r = _p("""
+  y
+wccy
+  gg
+""")
+        mask_l = _p("""
+  y
+yccw
+ gg
+""")
+        going_right = random.random() < 0.5
+        speed = random.uniform(0.5, 1.0) * (1 if going_right else -1)
+        if going_right:
+            x, frames, mask = -6, [diver_r0, diver_r1], mask_r
+        else:
+            x, frames, mask = self.cols - 2, [diver_l0, diver_l1], mask_l
+        y = random.randint(9, max(10, self.rows - 5))
+
+        def on_death(e, aq):
+            aq.add_bubble(e)
+            aq.random_object(e)
+
+        self._add(Entity(
+            frames=frames, masks=[mask, mask],
+            x=x, y=y,
+            cb_args=[speed, 0, 0, 0.2],
+            default_color='c',
+            die_offscreen=True,
+            death_cb=on_death,
+        ))
+
     # ── Predation (--bloody) ─────────────────────────────────────────────────
 
     def _check_predation(self):
@@ -1407,8 +1461,9 @@ mmmmmm
         elif st == 1:  # opening
             if self._cs_portcullis and not self._cs_portcullis.alive:
                 gx, gy = self._gate_pos()
-                crab_f0 = ['(°w°)', '/| |\\']
-                crab_f1 = ['(°w°)', '\\| |/']
+                # ASCII-only crab to avoid wide-char rendering issues
+                crab_f0 = ['(._.)', '/| |\\']
+                crab_f1 = ['(._.)', '\\| |/']
                 mask    = [' yWy ', '     ']
                 c = CrabEntity(
                     frames=[crab_f0, crab_f1], masks=[mask, mask],
@@ -1416,7 +1471,7 @@ mmmmmm
                     cb_args=[-1, 0, 0, 0.25],
                     default_color='y',
                     die_offscreen=False,
-                    steps_out=14,
+                    steps_out=22,   # walk further so crab is clearly visible
                     entity_type='crab',
                 )
                 self._add(c)