feat(gtm): v2.5 - Hard Fact Extraction & UI

- Backend: Implemented secondary extraction phase for structured specs (JSON schema).

- Backend: Added strict normalization rules (min, cm, kg).

- Frontend: Added 'Phase1Data' interface update for specs.

- Frontend: Implemented new UI component for 'Technical Specifications' in Phase 1.

- Frontend: Updated header and sidebar to display 'v2.5' build marker.

- Docs: Updated architectural documentation.

templates/json_struktur_roboplanet.txt

@@ -0,0 +1,43 @@
+{
+  "metadata": {
+    "product_id": "string (slug)",
+    "brand": "string",
+    "model_name": "string",
+    "category": "cleaning | service | security | industrial",
+    "manufacturer_url": "string"
+  },
+  "core_specs": {
+    "battery_runtime_min": "integer (standardized to minutes)",
+    "charge_time_min": "integer (standardized to minutes)",
+    "weight_kg": "float",
+    "dimensions_cm": { "l": "float", "w": "float", "h": "float" },
+    "max_slope_deg": "float",
+    "ip_rating": "string",
+    "climb_height_cm": "float",
+    "navigation_type": "string (e.g. SLAM, LiDAR, VSLAM)",
+    "connectivity": ["string"]
+  },
+  "layers": {
+    "cleaning": {
+      "fresh_water_l": "float",
+      "dirty_water_l": "float",
+      "area_performance_sqm_h": "float",
+      "mop_pressure_kg": "float"
+    },
+    "service": {
+      "max_payload_kg": "float",
+      "number_of_trays": "integer",
+      "display_size_inch": "float",
+      "ads_capable": "boolean"
+    },
+    "security": {
+      "camera_types": ["string"],
+      "night_vision": "boolean",
+      "gas_detection": ["string"],
+      "at_interface": "boolean"
+    }
+  },
+  "extended_features": [
+    { "feature": "string", "value": "string", "unit": "string" }
+  ]
+}