feat: the Passage — crossing over becomes a layered rite (Workstream L)

cross_over was one verdict with one outcome. It is now five beats — listen,
name, unbind, open, release — each revealing something true about the
spirit, each paying escalating essence, each able to twist.

Reveals use the entity's REAL traits; there is no second hidden state
invented for the rite. Twists are trait-driven, verified directly rather
than assumed: a demon collapses the rite 3.6x more often than a calm spirit
(0.360 vs 0.099 at `unbind`) and lies ~31% of the time, while a spirit
under DECEIT_FLOOR cannot lie on any draw. A demon still resists at
`release` and never crosses — the existing judgment rule is preserved, not
re-implemented. Every draw comes from veil_float on the room's physical
entropy, never `random`.

Essence is kept across a collapse. Clawing it back would punish a seeker
for the spirit's instability, which is not theirs to control.

FIXED AN INFINITE LOOP IN THE SALVAGED TESTS, not a flake:
test_full_rite_on_a_calm_stuck_spirit ran `while layer is not None` while
passing collapse=FIRES. Its fixture comment claimed "both twist chances are
0 at these values, so NO draw can make this entity lie or collapse" — that
is false. COLLAPSE_FLOOR is 0.5 (deliberately below judgment's stuck bar of
0.6, as passage.py explains), and the fixture's volatility is 0.61, giving a
real ~9.9% collapse chance. Forced to fire, every layer bounced back to
`listen` and the run hung forever instead of failing.

Three fixes: hold the collapse draw (deceit still fires, which is the
point — it proves a spirit under the floor cannot lie even when told to),
correct the false comment, and bound the loop so a future regression fails
in seconds rather than hanging a test run.

Also added the entire seance.passage i18n block in both languages — the
agent died before writing it, so the gate was failing on 35 missing keys —
and reworded a comment in PassagePanel that spelled out a translation call
in full: the coverage checker greps source text and cannot tell a comment
from real code, so it demanded a key for the placeholder.

34 passage tests pass; 385 frontend; i18n parity and typecheck clean.

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

frontend/src/i18n/en.json

@@ -385,6 +385,64 @@
         "unknownTitle": "the lens will not open",
         "unknown": "Something refused the camera and would not say what. Try again, or turn to another channel."
       }
+    },
+    "passage": {
+      "title": "the passage",
+      "intro": "a spirit that wishes to go cannot go alone. five layers stand between them and the dark — unwrap each, and something true comes loose.",
+      "none": "no presence to release",
+      "noneHint": "summon a spirit before attempting the passage",
+      "begin": "begin the passage",
+      "attempt": "unwrap this layer",
+      "retry": "gather the thread again",
+      "earned": "essence gathered",
+      "collapsed": "the rite comes apart in your hands — the thread returns to the first layer. what you have already gathered stays yours.",
+      "lieNote": "what this layer told you was not true.",
+      "crossedTitle": "it goes",
+      "resistedTitle": "it will not go",
+      "layers": {
+        "listen": {
+          "title": "listen",
+          "prompt": "be silent, and let it speak first."
+        },
+        "name": {
+          "title": "name",
+          "prompt": "say what it was called, when it was called anything."
+        },
+        "unbind": {
+          "title": "unbind",
+          "prompt": "find the knot that holds it here, and loosen it."
+        },
+        "open": {
+          "title": "open",
+          "prompt": "make a door where there was only wall."
+        },
+        "release": {
+          "title": "release",
+          "prompt": "let go. this is the part that costs you."
+        }
+      },
+      "reveal": {
+        "alignment": {
+          "low": "there is something under this one that does not wish you well.",
+          "mid": "it is neither kind nor cruel — only tired.",
+          "high": "whatever it was in life, it means you no harm."
+        },
+        "power": {
+          "low": "it is thin as breath on glass; it could not hurt you if it tried.",
+          "mid": "there is weight to it — enough to move a small thing.",
+          "high": "it is far stronger than it has been letting you believe."
+        },
+        "volatility": {
+          "low": "it is steady. it has been waiting a long time and is good at it.",
+          "mid": "it flickers when you press too hard.",
+          "high": "it will not hold still — the rite may come apart on you."
+        },
+        "deceptiveness": {
+          "low": "it does not know how to lie, and never learned.",
+          "mid": "it tells you most of a truth and keeps the rest.",
+          "high": "very little of what it says can be trusted."
+        }
+      }
     }
   },
   "codex": {