feat: journal UX overhaul — picker, export dialog, events, readability

- Sidebar i18n: added missing nav.journal to backend ru.json
- Export: SaveWorklogReport binding with native SaveFileDialog + os.WriteFile
- Filter: better IncludeChildren label with disabled tooltip
- Filter: renamed billable→К оплате, approximate→Тип времени with hints
- worklog_entry_events table (migration 013) linking entries to activity events
- Suggestion: EventIDs + Events details, expandable cards with timestamps
- Journal rows: expandable with details, source, linked events
- Contrast: improved readability for dates, timestamps, hover states
- i18n: added worklog.*, journal.*, suggest.* keys to ru.js/en.js

internal/i18n/locales/en.json

@@ -7,6 +7,17 @@
   "nav.recipes": "Recipes",
   "nav.documents": "Documents",
   "nav.archive": "Archive",
+  "nav.journal": "Work Log",
+  "nav.sections": "Sections",
+  "nav.cases": "Cases",
+  "nav.noCases": "No cases",
+  "nav.sync": "Sync",
+  "nav.syncSettings": "Sync settings",
+  "nav.syncNow": "Sync now",
+  "nav.selectPrompt": "Select a section or case",
+  "nav.brand": "Verstak",
+  "nav.createNode": "Create node",
+  "nav.moveToRoot": "Move to root",
 
   "tab.overview": "Overview",
   "tab.notes": "Notes",

internal/i18n/locales/ru.json

@@ -10,6 +10,7 @@
   "nav.sections": "Разделы",
   "nav.cases": "Дела",
   "nav.noCases": "Нет дел",
+  "nav.journal": "Журнал",
   "nav.sync": "Синхронизация",
   "nav.syncSettings": "Настройки синхронизации",
   "nav.syncNow": "Синхронизировать",
@@ -391,6 +392,8 @@
   "nav.noNodes": "Нет узлов",
   "nav.openFolder": "Открыть папку",
   "nav.createInside": "Создать внутри",
+  "nav.createNode": "Создать элемент",
+  "nav.moveToRoot": "Переместить в корень",
 
   "template.folder": "Папка",
   "template.project": "Проект",