Make Ollama prompt editable in admin AI settings

- Add prompt column to ai_settings (migration)
- AiSetting: DEFAULT_PROMPT constant + getActivePrompt() (falls back to default if empty)
- ProcessNailPolishImage: reads prompt from DB instead of hardcoded
- Admin view: textarea to edit prompt, shows active prompt, reset-to-default link

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Admin/AiSettingController.php

@@ -19,11 +19,13 @@ class AiSettingController extends Controller
         $request->validate([
             'ollama_url'   => 'required|url|max:255',
             'ollama_model' => 'required|string|max:100',
+            'prompt'       => 'nullable|string',
         ]);
 
         $ai = AiSetting::get();
         $ai->ollama_url   = rtrim($request->ollama_url, '/');
         $ai->ollama_model = $request->ollama_model;
+        $ai->prompt       = $request->filled('prompt') ? $request->prompt : null;
         $ai->save();
 
         return redirect()->route('admin.ai.show')->with('success', 'KI-Einstellungen gespeichert.');

app/Jobs/ProcessNailPolishImage.php

@@ -33,20 +33,7 @@ class ProcessNailPolishImage implements ShouldQueue
             $ai       = AiSetting::get();
             $imageB64 = base64_encode(Storage::disk('public')->get($import->image_path));
 
-            $prompt = <<<PROMPT
-You are analyzing a nail polish or nail product bottle/container image.
-Extract exactly these three fields and respond ONLY with a valid JSON object, no explanation, no markdown:
-{
-  "name": "the full product name or color description (e.g. 'Modeling Base Calcium Neutral Pink', 'Ruby Red', 'French White')",
-  "number": "the product code or article number printed on the label or cap (digits, letters, hyphens only — e.g. '12392-7', '123', 'NP-05')",
-  "manufacturer": "the brand or company name (the logo/brand printed on the product — e.g. 'NEONAIL', 'OPI', 'essie', 'Catrice')"
-}
-Rules:
-- manufacturer = the brand/logo name (usually prominent on the label)
-- name = the descriptive product/color name (NOT the brand)
-- number = numeric or alphanumeric code (NOT the color name)
-- If a value is genuinely not visible, use null
-PROMPT;
+            $prompt = $ai->getActivePrompt();
 
             $response = Http::timeout(160)->post("{$ai->ollama_url}/api/generate", [
                 'model'  => $ai->ollama_model,

app/Models/AiSetting.php

@@ -8,7 +8,27 @@ class AiSetting extends Model
 {
     protected $table = 'ai_settings';
 
-    protected $fillable = ['ollama_url', 'ollama_model'];
+    protected $fillable = ['ollama_url', 'ollama_model', 'prompt'];
+
+    public const DEFAULT_PROMPT = <<<PROMPT
+You are analyzing a nail polish or nail product bottle/container image.
+Extract exactly these three fields and respond ONLY with a valid JSON object, no explanation, no markdown:
+{
+  "name": "the full product name or color description (e.g. 'Modeling Base Calcium Neutral Pink', 'Ruby Red', 'French White')",
+  "number": "the product code or article number printed on the label or cap (digits, letters, hyphens only — e.g. '12392-7', '123', 'NP-05')",
+  "manufacturer": "the brand or company name (the logo/brand printed on the product — e.g. 'NEONAIL', 'OPI', 'essie', 'Catrice')"
+}
+Rules:
+- manufacturer = the brand/logo name (usually prominent on the label)
+- name = the descriptive product/color name (NOT the brand)
+- number = numeric or alphanumeric code (NOT the color name)
+- If a value is genuinely not visible, use null
+PROMPT;
+
+    public function getActivePrompt(): string
+    {
+        return !empty($this->prompt) ? $this->prompt : self::DEFAULT_PROMPT;
+    }
 
     public static function get(): self
     {