Feature/lmstudio provider (#30)

* chore: just a plan update

* Add LM Studio as local AI provider (OpenAI-compatible, like Ollama)

* Convert WebP thumbnails to JPEG before image analysis for LM Studio compatibility

* Strengthen language enforcement in image analysis prompt for local models

* Use i18n localized prompts for image analysis instead of English instructions

* Add airplane mode (Flugmodus) with status bar toggle and offline model preferences

* Fix flightmode: persist model IDs, skip network when offline, airplane icon

* Auto-fallback to offline models in airplane mode for chat, title, and image analysis

* Auto-select first local model as offline fallback when no explicit offline model configured

* Block git fetch/pull/push and site upload in airplane mode

* fix: thumbnails optimized for AI

* fix: error handling in airplane mode

---------

Co-authored-by: hugo <hugoms@me.com>

src/renderer/i18n/locales/en.json

@@ -34,6 +34,7 @@
   "app.sitemapGenerationFailed": "Sitemap generation failed",
   "app.calendarRegenerationFailed": "Calendar regeneration failed",
   "app.uploadSiteFailed": "Site upload failed",
+  "app.uploadSiteOfflineMode": "Site upload is blocked while airplane mode is active.",
   "app.uploadSiteNoCredentials": "Please configure SSH publishing credentials in Settings first.",
   "app.previewOpenFailed": "Failed to open selected post preview",
   "app.metadataDiff": "Metadata Diff",
@@ -314,6 +315,7 @@
   "gitSidebar.error.loadRepoStatus": "Unable to load repository status.",
   "gitSidebar.error.initFailed": "Failed to initialize git repository.",
   "gitSidebar.error.actionFailed": "Failed to {action}.",
+  "gitSidebar.error.offlineMode": "This action is blocked while airplane mode is active.",
   "gitSidebar.error.commitFailed": "Failed to commit changes.",
   "gitSidebar.progress.preparingInit": "Preparing repository initialization...",
   "gitSidebar.progress.pushingRemote": "Pushing commits to remote... this can take a while for large uploads.",
@@ -742,6 +744,7 @@
   "settings.ai.providerOpenCode": "OpenCode",
   "settings.ai.providerMistral": "Mistral",
   "settings.ai.providerOllama": "Ollama (Local)",
+  "settings.ai.providerLmstudio": "LM Studio (Local)",
   "settings.ai.providerOther": "Other",
   "settings.ai.ollamaLabel": "Ollama (Local Models)",
   "settings.ai.ollamaDescription": "Connect to a locally running Ollama instance to use local AI models.",
@@ -756,6 +759,28 @@
   "settings.toast.modelCatalogRefreshFailed": "Failed to refresh model catalog",
   "settings.toast.ollamaEnabled": "Ollama enabled",
   "settings.toast.ollamaDisabled": "Ollama disabled",
+  "settings.ai.lmstudioLabel": "LM Studio (Local Models)",
+  "settings.ai.lmstudioDescription": "Connect to a locally running LM Studio instance to use local AI models.",
+  "settings.ai.lmstudioEnable": "Enable LM Studio",
+  "settings.ai.lmstudioCapabilitiesDescription": "Configure capabilities for each LM Studio model. Enable tools for function calling or vision for image analysis.",
+  "settings.ai.lmstudioCapModel": "Model",
+  "settings.ai.lmstudioCapTools": "Tools",
+  "settings.ai.lmstudioCapVision": "Vision",
+  "settings.toast.lmstudioEnabled": "LM Studio enabled",
+  "settings.toast.lmstudioDisabled": "LM Studio disabled",
+  "settings.ai.offlineLabel": "Airplane Mode",
+  "settings.ai.offlineDescription": "When enabled, only locally hosted models (Ollama, LM Studio) are used. Cloud providers are disabled.",
+  "settings.ai.offlineEnable": "Enable Airplane Mode",
+  "settings.ai.offlineChatModel": "Offline Chat Model",
+  "settings.ai.offlineChatModelDescription": "Model used for chat conversations when in airplane mode.",
+  "settings.ai.offlineTitleModel": "Offline Title Model",
+  "settings.ai.offlineTitleModelDescription": "Model used for title generation when in airplane mode.",
+  "settings.ai.offlineImageAnalysisModel": "Offline Image Analysis Model",
+  "settings.ai.offlineImageAnalysisModelDescription": "Model used for image analysis when in airplane mode.",
+  "settings.ai.offlineNoLocalProviders": "No local providers enabled. Enable Ollama or LM Studio first.",
+  "settings.ai.offlineNoLocalModels": "No local models available",
+  "settings.toast.offlineEnabled": "Airplane mode enabled",
+  "settings.toast.offlineDisabled": "Airplane mode disabled",
   "settings.publishing.sshHostDescription": "The SSH server hostname or IP address.",
   "settings.publishing.sshUsernameDescription": "Your SSH account username.",
   "settings.publishing.sshRemotePathDescription": "The destination directory on the remote server where your blog will be published.",
@@ -891,6 +916,9 @@
   "statusBar.theme": "Theme: {theme}",
   "statusBar.ui": "UI",
   "statusBar.uiLanguage": "UI language",
+  "statusBar.offlineMode": "Airplane Mode",
+  "statusBar.offlineModeActive": "Airplane Mode (active)",
+  "statusBar.offlineModeTooltip": "Click to toggle airplane mode",
   "windowTitleBar.toggleSidebar": "Toggle Sidebar",
   "windowTitleBar.hideSidebar": "Hide Sidebar (Ctrl+B)",
   "windowTitleBar.showSidebar": "Show Sidebar (Ctrl+B)",