Wire game transitions end-to-end, add Guide lookup, add 79 tests

Transitions:
- Add I-HOUSEWRECK (tick 20) and I-VOGONS (tick 50) timed events to
  earth.py, queued at startup in main.py
- I-VOGONS demolishes Earth and moves player to Vogon Hold
- Fix airlock→Dark transition to call Dark room M-ENTER handler
- Fix dream-restore to support multiple callbacks (list instead of single)
- Add state.finish() call to RAMP for endgame victory

Guide system:
- Add 16-entry lookup database to GUIDE object (space, towel, vogons,
  poetry, beast, babel fish, earth, magrathea, marvin, etc.)
- "consult guide about X" now returns relevant entry text

Tests (79 passing):
- test_engine.py (14): containment, flags, articles, clock mechanics
- test_parser.py (20): directions, compound verbs, prepositions, synonyms
- test_earth.py (21): full opening sequence, puzzles, navigation
- test_vogon.py (4): room existence, Hold first-visit sequence
- test_dark.py (7): inventory clearing, dream dispatch, probabilities
- conftest.py: shared game fixture and send() helper

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_dark.py

@@ -0,0 +1,124 @@
+"""Tests for the DARK dream dispatch room."""
+
+from tests.conftest import send
+
+
+def test_dark_room_exists(game):
+    """Verify the DARK room was registered."""
+    state, _, _ = game
+    dark_room = state.world.get_room("DARK")
+    assert dark_room is not None
+    assert dark_room.id == "DARK"
+
+
+def test_dark_entry_clears_inventory(game):
+    """Entering the DARK room should strip all inventory items."""
+    state, _, _ = game
+    # Give player an item
+    gown = state.world.get("GOWN")
+    gown.move_to(state.protagonist)
+    assert len(state.protagonist.children) > 0
+
+    # Enter dark room
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    state.output.flush()
+
+    # Inventory should be cleared (items moved to local_globals)
+    assert len(state.protagonist.children) == 0
+
+
+def test_dark_entry_sets_dreaming(game):
+    """Entering DARK should set the dreaming flag."""
+    state, _, _ = game
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    state.output.flush()
+
+    assert state.dreaming is True
+
+
+def test_dark_entry_produces_text(game):
+    """Entering DARK should display flavor text."""
+    state, _, _ = game
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    text = state.output.flush()
+
+    assert len(text) > 0
+
+
+def test_dark_dispatch_heart_prob(game):
+    """With 100% heart_prob and 0% for others, dispatch should go to ENTRY-BAY."""
+    state, _, _ = game
+    state.flags["heart_prob"] = 100
+    state.flags["vogon_prob"] = 0
+    state.flags["traal_prob"] = 0
+    state.flags["fleet_prob"] = 0
+
+    # Enter dark room
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    state.lying_down = False
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    state.output.flush()
+
+    # Set ready and trigger dispatch
+    state.flags["dark_exit_ready"] = True
+    state.flags["dark_hint_given"] = True
+    text = send(game, "south")
+
+    # Should be dispatched to ENTRY-BAY (Heart of Gold)
+    assert state.here.id == "ENTRY-BAY"
+
+
+def test_dark_dispatch_vogon_prob(game):
+    """With 100% vogon_prob and 0% for others, dispatch should go to HOLD."""
+    state, _, _ = game
+    state.flags["heart_prob"] = 0
+    state.flags["vogon_prob"] = 100
+    state.flags["traal_prob"] = 0
+    state.flags["fleet_prob"] = 0
+
+    # Enter dark room
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    state.lying_down = False
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    state.output.flush()
+
+    # Set ready and trigger dispatch
+    state.flags["dark_exit_ready"] = True
+    state.flags["dark_hint_given"] = True
+    text = send(game, "south")
+
+    assert state.here.id == "HOLD"
+
+
+def test_dark_look_shows_pitch_dark(game):
+    """Looking in DARK should describe pitch darkness."""
+    state, _, _ = game
+    dark_room = state.world.get_room("DARK")
+    state.here = dark_room
+    state.protagonist.move_to(dark_room)
+    if dark_room.action:
+        dark_room.action(state, "M-ENTER")
+    state.output.flush()
+
+    # Trigger M-LOOK
+    dark_room.action(state, "M-LOOK")
+    text = state.output.flush()
+    assert "pitch dark" in text.lower()