fix(app): 修复 AppController 安全与查询问题

- 加强异常处理、类型安全和图片上传校验
- 优化设备相关查询，避免重复访问数据源
- 补充并记录并发测试与审查修复实施计划

tmp/hatch-pet/omen-cat/run/prompts/row-retries/idle.md

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+Create Codex pet row `idle` for `youmiao`: exactly 6 full-body frames in one horizontal strip on flat pure yellow #FFFF00.
+
+Use the attached canonical base for identity and the layout guide only for spacing. Same pet in every frame: Dark Omen-inspired cartoon cat; oversized angular purple cat-eared hood; black void face with three cyan energy marks; compact feline body; broad charcoal armor and bandage wraps; long attached tail; no weapons, logos, text, scenery, shadows, smoke, particles, detached effects, blur, or bloom. Preserve silhouette, face, palette, material, proportions, markings, and props.
+
+Keep apparent pet scale and baseline stable within the row unless the state itself intentionally changes vertical position, such as `jumping`.
+
+Action: Calm low-distraction resting loop: subtle breathing, tiny blink, slight head/body bob, and only quiet persona-preserving motion.
+
+State requirements:
+- CRITICAL: idle is the low-distraction baseline state and the first frame is also used as the reduced-motion static pet.
+- Use only subtle idle motion: gentle breathing, a tiny blink, a slight head or body bob, a very small material sway, or another quiet motion that fits the pet persona.
+- Keep the pet essentially in the same pose, facing direction, silhouette, markings, palette, and prop state across all 6 frames.
+- Idle variation must stay calm but still read as animation; do not repeat effectively identical copies across the loop.
+- Do not show waving, walking, running, jumping, talking, working, reviewing, emotional reactions, large gestures, item interactions, or new props.
+- Feet, base, body, or object anchor should remain planted or nearly planted.
+- The first and last frames should be very close visually so the loop feels calm and does not pop.
+
+One centered complete pose per invisible slot. No text, boxes, guide marks, scenery, shadows, glows, motion blur, speed lines, dust, detached effects, stray pixels, or #FFFF00 colors in the pet.