Added _geminiAvailable global flag (false by default):
- Set in _initApp() from serverSettings.gemini_key_set after app loads
- Updated in syncSettingsFromDB() so it stays current if key is added later
Added _requireGemini() helper:
- Returns true if Gemini key is configured → proceed normally
- Returns false + shows a warning toast if key is missing → abort
Added _updateGeminiButtonState():
- Adds .header-btn-no-ai CSS class to Gemini button when key is missing:
greyed out, slight grayscale filter, amber dot badge in corner
- Updates button tooltip to explain what to do
- Removes class/restores normal appearance when key is present
All 6 AI entry points now call _requireGemini() as first line:
captureForAI() — AI product identification from scan page
captureForAIFormFill() — AI product fill in manual add form
scanExpiryWithAI() — AI expiry date reader
openRecipeDialog() — recipe generation dialog
generateRecipe() — recipe generation (direct call path)
quickRecipeSuggestion() — quick expiring-products recipe (→ chat)
showPage('chat') — Gemini chat page
Previously: user would click the button, camera would open, API call
would fail, and only THEN see an error message deep in the flow.
Now: blocked immediately at the entry point with a clear toast.
dadaloop82
a85390b498