v0.250.0: i18n slice 1 release C — the language switch on every dashboard page (R-556)

- addLanguageData: the v0.247.0 hide condition (switch only on non-Hungarian pages or with ?lang=) is
  deleted; every template is converted, so the offer no longer leads to a half-English page.
- 89 layout parity fixtures re-captured; each equals its predecessor plus exactly one switch form after
  the version span (checked byte-for-byte, 89 of 89). The 17 standalone fixtures are unchanged.
- TestLanguageSwitch_EndToEnd: a Hungarian household with no ?lang= sees the form (red-proofed by
  restoring the condition: this test and 89 parity cases fail).
- CHANGELOG v0.250.0, README §18, CONTEXT.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/README.md

@@ -46,7 +46,7 @@ backups, monitoring and notifications. All Proxmox/disk operations are delegated
   - [App-to-App Integrations](#15-app-to-app-integrations)
   - [Network File Sharing — SMB](#16-network-file-sharing--smb-megosztás-v01440-r-7-slice-1)
   - [Async-job feedback](#17-async-job-feedback-v0147x-feedback-slice-1)
-  - [Dashboard language (i18n)](#18-dashboard-language-i18n-v02470-spike)
+  - [Dashboard language (i18n)](#18-dashboard-language-i18n-v02470v02500)
 - [Repository Layout](#repository-layout)
 - [Configuration](#configuration)
 - [REST API](#rest-api)
@@ -3614,17 +3614,16 @@ without reaching `Images()`.
 
 ---
 
-### 18. Dashboard language (i18n) (v0.247.0, spike)
+### 18. Dashboard language (i18n) (v0.247.0–v0.250.0)
 
 Design: `felhom.eu/documentation/architecture/10-localisation.md`. Inventory:
 `felhom.eu/documentation/audits/I18N-INVENTORY-2026-09-17.md`.
 
-**What a household sees:** nothing new. Hungarian is the default and the only language shown unless
-the language is switched. English covers the **launcher**, the **backups overview** (`/backups`), the
-**app page** (`/apps/<slug>`), the shared **layout**, and since v0.248.0 the **dashboard, apps list,
-logs, monitoring, import, export, deploy/settings-of-an-app and the three settings pages** — other
-pages keep their Hungarian body inside an English menu. Server-built messages and catalog copy stay
-Hungarian (slices 2 and 5).
+**What a household sees:** Hungarian by default, and since v0.250.0 a **Magyar / English** switch in the
+sidebar footer of every dashboard page. Every template is converted (v0.247.0 three pages, v0.248.0
+apps and settings, v0.249.0 backups, v0.250.0 storage, sharing, sign-in, claim, guest share, catch-all,
+debug). Server-built messages (flash lines, errors, labels built in Go), three page titles built in Go
+around an app name, and catalog copy stay Hungarian (slices 2 and 5).
 
 - **Bundles:** `internal/i18n/locales/hu.json` (authoritative, every key) and `en.json`, embedded.
   Flat `key → text`; a value may carry template actions (`{{.RecoveryAbandonDate}}`) and inline
@@ -3637,15 +3636,18 @@ Hungarian (slices 2 and 5).
 - **Fallback:** a key missing from English shows the Hungarian text and is counted (startup INFO line
   `i18n: en template set shows Hungarian for N markers`); never a key, never a blank.
 - **Language of a request:** `?lang=hu|en` (testing override, never persisted) → `settings.json`
-  `language` → `hu`. `executeTemplate` renders from that language's set. Pages rendered outside
-  `executeTemplate` (login, claim, recovery, the guest share pages) stay Hungarian.
+  `language` → `hu`. `executeTemplate` renders from that language's set. Pages outside the dashboard
+  chrome (login, claim, recovery, both guest share pages, the catch-all) render through
+  `executeTemplateLang`: the household language, but NO session CSRF fields and NO escrow reminder
+  (`TestI18nDirectRenderPagesHaveNoAdminChrome`, `TestDirectRenderHandlersFollowLanguage`).
 - **The switch:** `POST /settings/language` (`lang`, `back`; session CSRF like every form) saves the
-  language and redirects to `back` without its query. Shown in the sidebar footer **only when the page
-  is not Hungarian or the request carries `?lang=`** — deliberate for this release (three pages are
-  English); the way back is always on screen.
-- **Go-side copy:** a handler names its title key (`data["TitleKey"]`); non-Hungarian sets override
-  the copy-producing template funcs (`stateLabel`, `timeAgo`, `timeAgoStr`, `nextRunLabel`,
-  `statusText`) from the bundle. The Hungarian funcs are untouched.
+  language and redirects to `back` without its query. Shown in the sidebar footer of **every**
+  dashboard page, in both languages, since v0.250.0 (until then only on non-Hungarian pages or with
+  `?lang=`, while English was partial).
+- **Go-side copy:** a handler names its title key (`data["TitleKey"]`, pinned equal to its Hungarian
+  literal by `TestHandlerTitleKeysMatchHungarianTitle`); non-Hungarian sets override the copy-producing
+  template funcs (`stateLabel`, `timeAgo`, `timeAgoStr`, `nextRunLabel`, `statusText`, `infraMeta`) from
+  the bundle. The Hungarian funcs are untouched.
 - **Report:** the hub report carries `"language"` (always present). No hub release reads it yet.
 - **Tools and gates:** `scripts/i18n_extract.py` converts a template (moves each Hungarian run into
   hu.json, leaves a marker); `scripts/i18n_missing_gate.py` (in `controller_gates.py`) checks keys