fix(tester): assume mobile capabilities in preflight

skills/test-preflight/references/schema.md

@@ -18,10 +18,9 @@ fixtures:
 cleanup:
   required: true
   steps: [delete-run-data]
+# Optional project metadata. It is not a preflight gate.
 capabilities:
-  # These baseline checks are mandatory for mobile rows and cannot be disabled
-  # with AUTHORIZE_ALBUM or IME_PINYIN.
-  required: [album_picker, photo_permission, ime_pinyin]
+  assumed: [album_picker, photo_permission, ime_pinyin]
 matrix:
   - platform: android
     tester:
@@ -52,34 +51,12 @@ needs non-empty `references`; a required cleanup needs non-empty `steps` or
 `run`. For a read-only run, use `required: false` with a non-empty `reason`.
 The skill never executes these values.
 
-## Mobile capability contract
+## Client capabilities
 
-Every Android/iOS matrix row checks these capabilities on the actual tester node:
-
-| capability | required evidence |
-|---|---|
-| `album_picker` | `checks.picker`: the real platform album/Photos picker opened and returned a selectable asset |
-| `photo_permission` | `checks.permission` and `checks.test_image`: permission state was exercised and the declared test image was available |
-| `ime_pinyin` | `checks.composition` and `checks.candidates`: real Chinese pinyin composition and candidate selection succeeded |
-
-The default list is always applied; `capabilities.required` can add project-specific
-checks but cannot remove these three. A contract runner receives one request per
-capability:
-
-```json
-{
-  "operation": "capability_probe",
-  "platform": "android",
-  "node": "tester.android",
-  "capability": "ime_pinyin",
-  "required_checks": ["composition", "candidates"]
-}
-```
-
-It must return every requested check with `status`, `observed`, and (when useful)
-`expected`/`remediation`. Missing evidence is `blocked`; a real probe failure is
-`environment-fail`. Environment variables such as `AUTHORIZE_ALBUM` and
-`IME_PINYIN` are not capability evidence.
+The project assumes the mobile test nodes provide the album picker, photo permission,
+test image, and Chinese IME. These are not preflight declarations or gates. Journey
+cases exercise the real UI; failures are recorded as product failures. `AUTHORIZE_ALBUM`
+and `IME_PINYIN` are not read.
 
 ## Tester-node contract