feat(i18n): Hebrew locale + full RTL support (#243)

# feat(i18n): Hebrew locale + full RTL support

## Summary

This PR adds full Hebrew (he) locale support to the UI, including a
complete translation of all user-facing strings and comprehensive RTL
layout support across all components.

## What was done

### Hebrew translation
- Full translation of all i18n message files for the `he` locale (17
translation files)
- Registered the language in the i18n system and the language picker

### RTL support
- Automatic direction detection (`dir="rtl"`) when Hebrew is selected
- Replaced physical CSS properties (`left`/`right`) with logical
equivalents (`inline-start`/`inline-end`) across the project
- Fixed resize direction, file path alignment, and textarea padding
- Fixed navigation button positioning in textarea for RTL
- Fixed scrollbar direction in RTL
- Fixed code block direction and selector alignment
- Fixed Monaco editor direction in the file viewer
- Auto-detect text direction in reasoning block (`dir="auto"` +
`unicode-bidi: plaintext`)

### Adapted components
- `session-layout` — sidebar and resize handle
- `prompt-input` — text direction and buttons
- `message-base` — message blocks and reasoning
- `message-timeline` — timeline bar
- `right-panel` — right side panel
- `tool-call` — tool call display
- `settings-screen` — settings page
- `selector` — selection component
- `instance-shell` — main shell

## New files

```
packages/ui/src/lib/i18n/messages/he/
  advancedSettings.ts
  app.ts
  commands.ts
  dialogs.ts
  filesystem.ts
  folderSelection.ts
  index.ts
  instance.ts
  loadingScreen.ts
  logs.ts
  markdown.ts
  messaging.ts
  remoteAccess.ts
  session.ts
  settings.ts
  time.ts
  toolCall.ts
```

## Suggested testing
- Switch language to Hebrew and verify all strings are translated
- Verify RTL layout is correct across all screens (session, settings,
file viewer)
- Verify that English text inside a reasoning block is displayed LTR
- Switch back to English and verify everything returns to LTR

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Shantur Rathore <i@shantur.com>

packages/ui/src/components/instance-info.tsx

@@ -82,7 +82,7 @@ const InstanceInfo: Component<InstanceInfoProps> = (props) => {
       <div class="panel-body space-y-3">
         <div>
           <div class="text-xs font-medium text-muted uppercase tracking-wide mb-1">{t("instanceInfo.labels.folder")}</div>
-          <div class="text-xs text-primary font-mono break-all px-2 py-1.5 rounded border bg-surface-secondary border-base">
+          <div dir="ltr" class="text-xs text-primary font-mono break-all px-2 py-1.5 rounded border bg-surface-secondary border-base">
             {currentInstance().folder}
           </div>
         </div>
@@ -94,7 +94,7 @@ const InstanceInfo: Component<InstanceInfoProps> = (props) => {
                 <div class="text-xs font-medium text-muted uppercase tracking-wide mb-1">
                   {t("instanceInfo.labels.project")}
                 </div>
-                <div class="text-xs font-mono px-2 py-1.5 rounded border truncate bg-surface-secondary border-base text-primary">
+                <div dir="ltr" class="text-xs font-mono px-2 py-1.5 rounded border truncate bg-surface-secondary border-base text-primary">
                   {project().id}
                 </div>
               </div>
@@ -137,7 +137,7 @@ const InstanceInfo: Component<InstanceInfoProps> = (props) => {
             <div class="text-xs font-medium text-muted uppercase tracking-wide mb-1">
               {t("instanceInfo.labels.binaryPath")}
             </div>
-            <div class="text-xs font-mono break-all px-2 py-1.5 rounded border bg-surface-secondary border-base text-primary">
+            <div dir="ltr" class="text-xs font-mono break-all px-2 py-1.5 rounded border bg-surface-secondary border-base text-primary">
               {currentInstance().binaryPath}
             </div>
           </div>
@@ -151,7 +151,7 @@ const InstanceInfo: Component<InstanceInfoProps> = (props) => {
             <div class="space-y-1">
               <For each={environmentEntries()}>
                 {([key, value]) => (
-                  <div class="flex items-center gap-2 px-2 py-1.5 rounded border bg-surface-secondary border-base">
+                  <div dir="ltr" class="flex items-center gap-2 px-2 py-1.5 rounded border bg-surface-secondary border-base">
                     <span class="text-xs font-mono font-medium flex-1 text-primary" title={key}>
                       {key}
                     </span>