feat: generate source-only watch thumbnails after photo uploads

SHA256SUMS

@@ -32,6 +32,7 @@ b48f3ab6f28404bb34c188067a832384f4ba290e56912461ef3565528aa157d8  docs/PUBLICATI
 5eb19e7e4ed1ceddbdf388fd55697e40f1b7ecd9a4fbdf8ab485132cc684dcb2  docs/REAL_DEVICE_TEST.md
 bfc38b889fa966031e195c3131db1d4a713e0dc35c644e3047c7ed94f2354700  docs/RESEARCH.md
 fac36f986e1a7a331d3669aa8e2013e6c0ea7a99c16a61ba3ff573e836aa87e1  docs/SYNOLOGY_PHOTOS_API.md
+eeb127adac67c18be1fd25b7fba3bd9e41624e844105b2f27488ecd3a1bd0c10  docs/WATCH-THUMBNAIL.md
 f8ef7749c58d4396781bbc21371048f6561e791efbd489570224dc51173bffff  docs/brand/README.md
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 da6734d8a23305f6254c0936dadff4ec34977b4c934f5067186423c8cfce3fc7  docs/brand/pigway-logo.png
@@ -55,8 +56,9 @@ e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  pigway_frame_f
 81effa34d6c452579cfa65781909f7c5a9e8ddad136e4c47ee0704939851879a  pigway_frame_flow/display/cloud_library.py
 5e7e272e671a6d01d9b677416c77967ca488b4e2aa559f4211cf0de4ba1e88bc  pigway_frame_flow/display/recovery.py
 e1e4ae3ba321ae7282c5a4e061c52f24d2a6a6e3d4637e69e4b1fbd05004f5f6  pigway_frame_flow/display/retention.py
-d974caaa2772b013cc6f080f997d37cd0d2212b29fa9524002f3fb87dd937364  pigway_frame_flow/display/service.py
+14bb319a5e81c6d95d2a2038073b1db616b3cce8bb7f715376c54ddf4ab02f5a  pigway_frame_flow/display/service.py
 0975b24488be19f24e768c4c76d9f3c0348417c1351c4e410897da00f7be6656  pigway_frame_flow/display/upload_reconciliation.py
+fcedbac7b8fe57a906882d6fdb54bd570fe2ae32d828cc6dcc98339fb9e77745  pigway_frame_flow/display/wrist_thumbnail.py
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  pigway_frame_flow/drivers/__init__.py
 9a8386ef368a6df7fd8cb23bcc442c28e784729a5ce4a78911ad86245d5c5794  pigway_frame_flow/drivers/base.py
 54cff8782e21e2ee4b8540259a4868380c58a0aa656c9d23796a049ab96a1b4f  pigway_frame_flow/drivers/generic_http.py
@@ -77,7 +79,7 @@ d463465ca3aea449e67386bc84a5f25b58535f74d89d7858c5b9bca0d93189d3  pigway_frame_f
 6d70e410d3559f370e4489aa92b54eea91d11407e8039c9adf31612de0456df1  pigway_frame_flow/extensions/providers.py
 ab3081bd1afd2a4cd501355f10771cd92f3432439d9bc240d0790c2e76c2a508  pigway_frame_flow/extensions/quality.py
 8e7d7da457d3b82811dc98cf6c3a93fcd7cbe8a4addb5682f48b1acd4983de82  pigway_frame_flow/extensions/secrets.py
-49f2d6f7a35675fedaf03ca648f046bde6e49aebb21d6e7afb39f1b8a523fbb2  pigway_frame_flow/extensions/storage.py
+83fea5407cbb83ca426cda420cc995e9346955e747e0cda2f7e6546fbd50dc06  pigway_frame_flow/extensions/storage.py
 1f2db3a58e7ebe5a4531f4550356fc9bcb331a2701f0bc25edf0ea8b13a57d97  pigway_frame_flow/extensions/webhooks.py
 b0855f8d22665fb208dfe47856f374b76a3861c15efb312d4ada81e84fee64e5  pigway_frame_flow/integrations/__init__.py
 d3025e294466d72c9332a7c577c3262816c6a12d12c7c2f0c241a7e423034eed  pigway_frame_flow/integrations/kokonna_official/README.md
@@ -231,6 +233,7 @@ ca98469f6a6b8b49c36a00657ea1a81775c3496e1fbdd5e38eb4d5298b5936b4  tests/test_syn
 bdc3142f9c2291a91a5091b4b98b1addf9569cfb141810024ce6f85309704b9b  tests/test_upload_retries.py
 8ec55ce5706d791a155f13445fe7e0828278e8ee1fa1b527591fdf24cc5b2e86  tests/test_weather.py
 e95eaa1f8a7416c5035ae6deae640b8d5defb2db36c0b8dac6d65bcceedc6750  tests/test_widgets.py
+2b3ab560a0211e45a7bc7e26104d3d9416c4615fbeccaf3bb5eec4747aaea4cf  tests/test_wrist_thumbnail.py
 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855  vendor/__init__.py
 4cae8606769fdb590c427bc1716a871017bf22d91aabf8a52513bf126cfb847f  vendor/guooscar_kokonna.py
 63c7a2f1a6adf98e7fb83a83ae2d6a2dddcecd7bce4d7de25dd6f26bd496019f  vendor/guooscar_protocol.py

docs/WATCH-THUMBNAIL.md

@@ -0,0 +1,9 @@
+# 手表小图
+
+照片数据源图片成功上传到本地图库或画框云端后，生成当前手表屏幕尺寸的 410×502 RGB JPEG。默认等比缩放、居中裁切铺满屏幕，不拉伸、不补边、不叠加日期、文字或边框；源文件不变。自定义裁切尚未实现。
+
+小图使用添加画框说明前的源画面；Synology Photos 当前只能提供源预览，结果中的 `source_rendition` 标记为 `preview`，不称为原图。没有可验证源画面的模板和旧图库成品暂不生成。
+
+成功操作结果的 `wrist_thumbnail` 包含鉴权资源 URL、尺寸、字节数、SHA-256、生成时间、服务器配置时区及当地日期。`app_config` 的 `wrist-thumbnail:<device_id>` 保存该设备最后一次成功生成的记录；日期用于判断是否属于当天，跨日不将旧图冒充当天图片。资源沿用 `/api/v1/assets/{asset_id}` 的鉴权规则，不开放公开下载或手表传输接口。
+
+上传失败不更新小图。辅助小图生成失败保留已有记录并记录日志，不重放已经成功的画框上传。最新小图受现有本地清理策略保护；更早小图作为 cache 沿用现有清理策略。本阶段未接入 BLE、手表端下载或实机显示验证。

pigway_frame_flow/display/service.py

@@ -205,7 +205,12 @@ class DisplayService:
             result.pop("preview_url", None)
             row = self.db.one("SELECT result FROM operations WHERE id=?", (id,))
             previous = json.loads(row["result"]) if row and row["result"] else {}
-            for key in ("photo_attempts", "upload_intent", "sync_observations"):
+            for key in (
+                "photo_attempts",
+                "upload_intent",
+                "sync_observations",
+                "wrist_thumbnail",
+            ):
                 if key in previous:
                     result = {**result, key: previous[key]}
         self.db.execute(
@@ -265,7 +270,13 @@ class DisplayService:
             )
 
     def content_asset(
-        self, content, device_id=None, operation_id=None, *, staging=False
+        self,
+        content,
+        device_id=None,
+        operation_id=None,
+        *,
+        staging=False,
+        source_image=None,
     ):
         if isinstance(content, AutoCollageContent):
             from pigway_frame_flow.extensions.auto_collage import prepare
@@ -419,6 +430,8 @@ class DisplayService:
                     ):
                         raise
                     continue
+                if source_image is not None:
+                    source_image["data"] = data
                 attempt["status"] = "PREPARED"
                 if operation_id:
                     self.db.execute(
@@ -625,15 +638,26 @@ class DisplayService:
 
             from pigway_frame_flow.models import Content
 
+            source_image: dict[str, bytes] = {}
             asset = self.content_asset(
-                TypeAdapter(Content).validate_python(payload), device_id, id
+                TypeAdapter(Content).validate_python(payload),
+                device_id,
+                id,
+                source_image=source_image,
             )
             self.assets.record_origin(asset["asset_id"], op)
             if action == "local-upload":
                 asset = self.assets.promote(asset["asset_id"])
-            self.update(
+            result = dict(asset_id=asset["asset_id"], url=asset["url"])
-                id, "COMPLETED", dict(asset_id=asset["asset_id"], url=asset["url"])
+            if action == "local-upload":
-            )
+                from pigway_frame_flow.display.wrist_thumbnail import publish
+
+                thumbnail = publish(
+                    self, device_id, asset["asset_id"], source_image.get("data")
+                )
+                if thumbnail:
+                    result["wrist_thumbnail"] = thumbnail
+            self.update(id, "COMPLETED", result)
             self.db.history(op, "COMPLETED")
             return
         device = driver.device(refresh=True)
@@ -757,6 +781,7 @@ class DisplayService:
         content = request.content
         self.update(id, "RENDERING")
         asset = None
+        source_image = {}
         if isinstance(content, ImageContent) and (
             content.image_id or content.image_name
         ):
@@ -769,7 +794,9 @@ class DisplayService:
                     )
                 image_id = matches[0].image_id
         else:
-            asset = self.content_asset(content, device_id, id, staging=True)
+            asset = self.content_asset(
+                content, device_id, id, staging=True, source_image=source_image
+            )
             self.assets.record_origin(asset["asset_id"], op)
             image_id = None
         self.db.execute(
@@ -803,6 +830,14 @@ class DisplayService:
         else:
             driver.display(image_id)
         result = {"image_id": image_id}
+        if asset:
+            from pigway_frame_flow.display.wrist_thumbnail import publish
+
+            thumbnail = publish(
+                self, device_id, asset["asset_id"], source_image.get("data")
+            )
+            if thumbnail:
+                result["wrist_thumbnail"] = thumbnail
         if asset:
             result["rendered_asset_id"] = asset["asset_id"]
             source = self.db.one(

pigway_frame_flow/display/wrist_thumbnail.py

@@ -0,0 +1,57 @@
+"""Source-only rendition for the current 410 × 502 watch display."""
+
+import hashlib
+import json
+import logging
+from datetime import datetime
+from zoneinfo import ZoneInfo
+
+from pigway_frame_flow.errors import FlowError
+from pigway_frame_flow.renderers.images import convert
+from pigway_frame_flow.storage.database import encode
+
+logger = logging.getLogger(__name__)
+SIZE = (410, 502)
+
+
+def publish(service, device_id, asset_id, data=None):
+    # Templates and old gallery assets have no verified undecorated source.
+    row = service.db.one(
+        "SELECT payload FROM asset_sources WHERE asset_id=?", (asset_id,)
+    )
+    source = json.loads(row["payload"]) if row else {}
+    if source.get("type") != "photo_source":
+        return None
+    try:
+        if data is None:
+            data, _, _ = service.photo_sources.read(
+                source["source_id"], source["item_id"], target_size=SIZE
+            )
+        rendered = convert(data, "cover", "color", size=SIZE)
+        asset = service.assets.put(rendered, "watch.jpg", "cache")
+        now = datetime.now(ZoneInfo(service.settings.timezone))
+        result = {
+            "asset_id": asset["asset_id"],
+            "url": asset["url"],
+            "width": SIZE[0],
+            "height": SIZE[1],
+            "date": now.date().isoformat(),
+            "timezone": service.settings.timezone,
+            "generated_at": now.isoformat(),
+            "sha256": hashlib.sha256(rendered).hexdigest(),
+            "bytes": len(rendered),
+            "source": source,
+            "fit": "cover",
+            "source_rendition": "preview"
+            if service.photo_sources.get(source["source_id"]).kind == "synology-photos"
+            else "source",
+        }
+        service.db.execute(
+            "INSERT OR REPLACE INTO app_config VALUES(?,?)",
+            ("wrist-thumbnail:" + device_id, encode(result)),
+        )
+        return result
+    except (FlowError, OSError, ValueError):
+        # An auxiliary rendition must never cause a successful upload to replay.
+        logger.warning("Watch thumbnail generation failed for asset %s", asset_id)
+        return None

pigway_frame_flow/extensions/storage.py

@@ -44,6 +44,7 @@ class LocalRetention:
             "SELECT payload FROM template_config",
             "SELECT payload FROM operations WHERE status IN ('QUEUED','RENDERING','UPLOADING','SYNCING','UNKNOWN')",
             "SELECT payload FROM app_config WHERE key LIKE 'upload-retry:%'",
+            "SELECT payload FROM app_config WHERE key LIKE 'wrist-thumbnail:%'",
         ]:
             payloads += [row["payload"] for row in db.all(query)]
         for payload in payloads:

tests/test_wrist_thumbnail.py

@@ -0,0 +1,106 @@
+import json
+from io import BytesIO
+
+import pytest
+from PIL import Image
+
+from pigway_frame_flow.errors import ErrorCode, FlowError
+from pigway_frame_flow.providers.photo_sources import PhotoSourceInput
+
+
+@pytest.fixture
+def photo(service, settings, legacy_photo_engine):
+    root = settings.data_dir.parent / "photos"
+    root.mkdir()
+    settings.photo_root = root
+    Image.new("RGB", (900, 300), (30, 150, 220)).save(root / "photo.jpg")
+    service.photo_sources.save(
+        "family", PhotoSourceInput(name="Family", kind="local", location=".")
+    )
+
+
+def upload(service):
+    operation = service.submit(
+        "display",
+        {
+            "content": {"type": "photo_source", "source_id": "family"},
+            "options": {"priority": 0},
+        },
+        "living-room",
+        "test",
+        "request",
+    )
+    assert service.process_one()
+    return service.operation(operation)
+
+
+def test_uploaded_source_generates_full_bleed_watch_image(service, photo, monkeypatch):
+    # Deliberately decorate the frame rendition; the watch must use source pixels.
+    def captioned(*args, **kwargs):
+        output = BytesIO()
+        Image.new("RGB", kwargs["size"], "black").save(output, "JPEG")
+        return output.getvalue()
+
+    read = service.photo_sources.read
+    monkeypatch.setattr(
+        service.photo_sources,
+        "read",
+        lambda *a, **kw: (*read(*a, **kw)[:2], {"title": "Caption"}),
+    )
+    monkeypatch.setattr(
+        "pigway_frame_flow.display.service.render_captioned_photo", captioned
+    )
+    op = upload(service)
+    thumbnail = op["result"]["wrist_thumbnail"]
+    with Image.open(service.assets.path(thumbnail["asset_id"])) as image:
+        assert image.size == (410, 502)
+        assert image.mode == "RGB"
+        assert not image.info.get("progressive")
+        for point in [(0, 0), (409, 501), (205, 251)]:
+            assert image.getpixel(point)[2] > 200
+    row = service.db.one(
+        "SELECT payload FROM app_config WHERE key='wrist-thumbnail:living-room'"
+    )
+    assert json.loads(row["payload"]) == thumbnail
+
+
+def test_failed_upload_does_not_publish_thumbnail(service, photo, monkeypatch):
+    def fail(*args):
+        raise FlowError(ErrorCode.UPLOAD_FAILED, "Rejected", 502)
+
+    monkeypatch.setattr(service.registry.get("living-room"), "upload", fail)
+    op = upload(service)
+    assert op["status"] == "FAILED"
+    assert (
+        service.db.one(
+            "SELECT payload FROM app_config WHERE key LIKE 'wrist-thumbnail:%'"
+        )
+        is None
+    )
+
+
+def test_thumbnail_failure_does_not_change_upload_outcome(service, photo, monkeypatch):
+    def fail(*args, **kwargs):
+        raise OSError("Image encoder unavailable")
+
+    monkeypatch.setattr("pigway_frame_flow.display.wrist_thumbnail.convert", fail)
+    op = upload(service)
+    assert op["status"] == "SYNCING"
+    assert "wrist_thumbnail" not in op["result"]
+
+
+def test_local_upload_publishes_and_retention_protects_latest(service, photo):
+    from pigway_frame_flow.extensions.storage import LocalRetention
+
+    operation = service.submit(
+        "local-upload",
+        {"type": "photo_source", "source_id": "family"},
+        "living-room",
+        "test",
+        "local-request",
+    )
+    assert service.process_one()
+    op = service.operation(operation)
+    assert op["status"] == "COMPLETED"
+    asset_id = op["result"]["wrist_thumbnail"]["asset_id"]
+    assert asset_id in LocalRetention(service).protected()