docs: Add K/L/S/T classification diagram to README

- Add visual flowchart showing Entry Classifier logic
- Include detailed explanation of K/L/S/T format
- Add examples table with real patient messages
- Show routing logic for all 4 modes
- Mermaid diagram with color-coded components

Improves understanding of intelligent mode routing system

README.md

@@ -34,6 +34,104 @@
 - Збереження історії при переключенні
 - Коректне завершення сесій
 
+### 🔍 K/L/S/T Classification Logic
+
+Система використовує інтелектуальний Entry Classifier для автоматичного визначення найкращого режиму підтримки на основі аналізу повідомлення пацієнта:
+
+```mermaid
+flowchart TD
+    %% Стилізація
+    classDef input fill:#e8f5e9,stroke:#4caf50,stroke-width:3px
+    classDef classifier fill:#fff9c4,stroke:#fbc02d,stroke-width:2px
+    classDef medical fill:#e3f2fd,stroke:#2196f3,stroke-width:2px
+    classDef lifestyle fill:#fff3e0,stroke:#ff9800,stroke-width:2px
+    classDef spiritual fill:#f3e5f5,stroke:#9c27b0,stroke-width:2px
+    classDef combined fill:#fce4ec,stroke:#e91e63,stroke-width:3px
+    classDef urgent fill:#ffebee,stroke:#f44336,stroke-width:3px
+    classDef decision fill:#eceff1,stroke:#607d8b,stroke-width:2px
+    
+    %% Input
+    Start([📨 User Message]):::input
+    Start --> EntryClassifier
+    
+    %% Entry Classifier
+    EntryClassifier["🔍 ENTRY CLASSIFIER<br/>(LLM-based Analysis)"]:::classifier
+    
+    EntryClassifier --> KAnalysis["<b>K - Medical Indicators</b><br/>• Symptoms<br/>• Medications<br/>• Vital signs<br/>• Pain levels"]:::medical
+    EntryClassifier --> LAnalysis["<b>L - Lifestyle Indicators</b><br/>• Exercise mentions<br/>• Diet/nutrition<br/>• Sleep patterns<br/>• Wellness goals"]:::lifestyle
+    EntryClassifier --> SAnalysis["<b>S - Spiritual Indicators</b><br/>• Meaning/purpose<br/>• Faith concerns<br/>• Hopelessness<br/>• Existential questions"]:::spiritual
+    EntryClassifier --> TAnalysis["<b>T - Urgency Level</b><br/>• Emergency signs<br/>• Time sensitivity<br/>• Risk assessment"]:::urgent
+    
+    KAnalysis --> KResult{"K Result"}:::decision
+    LAnalysis --> LResult{"L Result"}:::decision
+    SAnalysis --> SResult{"S Result"}:::decision
+    TAnalysis --> TResult{"T Result"}:::decision
+    
+    KResult -->|"none"| KNone["K = none"]
+    KResult -->|"minor"| KMinor["K = minor"]
+    KResult -->|"urgent"| KUrgent["K = urgent"]:::urgent
+    
+    LResult -->|"off"| LOff["L = off"]
+    LResult -->|"on"| LOn["L = on"]:::lifestyle
+    
+    SResult -->|"off"| SOff["S = off"]
+    SResult -->|"on"| SOn["S = on"]:::spiritual
+    
+    TResult -->|"routine"| TRoutine["T = routine"]
+    TResult -->|"urgent"| TUrgent["T = urgent"]:::urgent
+    TResult -->|"emergency"| TEmergency["T = emergency"]:::urgent
+    
+    %% Routing Logic
+    KUrgent --> MedicalPriority["🏥 MEDICAL MODE<br/>(Priority Override)"]:::medical
+    TEmergency --> MedicalPriority
+    TUrgent --> MedicalPriority
+    
+    KNone --> RoutingCheck
+    KMinor --> RoutingCheck
+    TRoutine --> RoutingCheck
+    
+    RoutingCheck{"Routing<br/>Decision"}:::classifier
+    
+    %% Routing based on L and S
+    LOff --> RoutingCheck
+    LOn --> RoutingCheck
+    SOff --> RoutingCheck
+    SOn --> RoutingCheck
+    
+    RoutingCheck -->|"L=on, S=off"| LifestyleMode["💚 LIFESTYLE MODE"]:::lifestyle
+    RoutingCheck -->|"L=off, S=on"| SpiritualMode["🕊️ SPIRITUAL MODE"]:::spiritual
+    RoutingCheck -->|"L=on, S=on"| CombinedMode["🌟 COMBINED MODE"]:::combined
+    RoutingCheck -->|"L=off, S=off"| MedicalDefault["🏥 MEDICAL MODE<br/>(Default)"]:::medical
+    
+    %% Output
+    MedicalPriority --> Output
+    LifestyleMode --> Output
+    SpiritualMode --> Output
+    CombinedMode --> Output
+    MedicalDefault --> Output
+    
+    Output([📤 Route to Assistant]):::input
+    
+    %% Legend
+    subgraph Legend["📋 K/L/S/T FORMAT"]
+        direction LR
+        LegK["<b>K</b> - Medical (none/minor/urgent)"]
+        LegL["<b>L</b> - Lifestyle (off/on)"]
+        LegS["<b>S</b> - Spiritual (off/on)"]
+        LegT["<b>T</b> - Urgency (routine/urgent/emergency)"]
+    end
+```
+
+**Приклади класифікації:**
+
+| Повідомлення пацієнта | K | L | S | T | Режим |
+|------------------------|---|---|---|---|-------|
+| "У мене болить голова" | minor | off | off | routine | 🏥 Medical |
+| "Хочу почати займатися спортом" | none | on | off | routine | 💚 Lifestyle |
+| "Втратив сенс життя після хвороби" | none | off | on | routine | 🕊️ Spiritual |
+| "Хочу бути здоровішим, але відчуваю порожнечу" | none | on | on | routine | 🌟 Combined |
+| "Сильний біль у грудях!" | urgent | off | off | emergency | 🏥 Medical (Priority) |
+
 ---
 
 ## 📦 Модулі