frontend+backend: patients/settings UI, AI Auto/Off modes, wallet doc push

- patients: move status filter to its own "Filter" row above the table
- patient sheet: name + ⋯ menu on one left row; Edit moved into the ⋯ menu
- settings: redesign sections with the COSS CardFrame surface (SettingsFrame)
- AI: add Automatic (auto-pick provider) and Off modes; default to Automatic
  so a fresh install shows the setup banner until a provider is configured
- AI: fix the setup banner never showing (defaulted Ollama URL counted as
  configured); add an "AI off" notice; add a fallback render for unknown chat
  data parts so cards never silently vanish
- backend: include patient attachment metadata in the wallet record-update
  bundle so pushed documents reach the wallet
- i18n: add mode/off/card keys across all five locales

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/src/lib/ai-validation.ts

@@ -5,7 +5,7 @@ import { z } from "zod";
 // is the plaintext key for the *currently selected* provider — it is encrypted
 // before storage and never echoed back.
 export const aiConfigInputSchema = z.object({
-  mode: z.enum(["api", "local"]).optional(),
+  mode: z.enum(["api", "local", "auto", "off"]).optional(),
   provider: z.enum(["openai", "anthropic", "gemini"]).optional(),
   ollamaBaseUrl: z.string().url().optional(),
   ollamaModel: z.string().min(1).max(120).optional(),