commit 3283888738431b6908ce3a48f18074dab36174a2
Author: djuka <djuka@local>
Date:   Wed Feb 18 05:03:40 2026 +0000

    Inicijalna implementacija Claude Web Chat (Faza 1 - CLI mod)
    
    - Login sa session cookie autentifikacijom
    - Lista projekata iz filesystem-a
    - Chat sa Claude CLI preko WebSocket-a
    - Streaming NDJSON parsiranje iz CLI stdout-a
    - Sesija zivi nezavisno od browsera (reconnect replay)
    - Sidebar sa .md fajlovima i markdown renderovanjem
    - Dark tema, htmx + Go templates
    - 47 unit testova
    
    Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

diff --git a/.gitea/workflows/test.yml b/.gitea/workflows/test.yml
new file mode 100644
index 0000000..6911129
--- /dev/null
+++ b/.gitea/workflows/test.yml
@@ -0,0 +1,11 @@
+name: Tests
+on: [push]
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.23'
+      - run: go test ./... -v -count=1
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2bf4165
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+config.json
+claude-web-chat
+*.exe
+*.test
+.env
+.claude/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..cf5ce8b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,55 @@
+# Claude Web Chat
+
+Web aplikacija za chat sa Claude CLI kroz browser. Go + htmx, bez JS frameworka.
+
+## Pokretanje
+
+```bash
+# Kopiraj config
+cp config.json.example config.json
+# Edituj config.json — podesi username, password, session_secret
+
+# Build i pokreni
+go build -o claude-web-chat && ./claude-web-chat
+```
+
+Aplikacija sluša na portu 9100 (podešava se u config.json).
+
+## Konfiguracija
+
+`config.json` (gitignored):
+
+| Polje | Opis | Default |
+|-------|------|---------|
+| port | HTTP port | 9100 |
+| mode | Mod rada: "cli" ili "api" | cli |
+| projects_path | Putanja do projekata | /root/projects |
+| username | Korisničko ime za login | (obavezno) |
+| password | Lozinka za login | (obavezno) |
+| session_secret | Secret za potpisivanje sesija | (obavezno) |
+| api.key | Anthropic API ključ (za api mod) | |
+| api.model | Model za API mod | claude-sonnet-4-20250514 |
+
+## Funkcionalnosti (Faza 1 — CLI mod)
+
+- Login sa session cookie auth
+- Lista projekata iz filesystem-a
+- Chat sa Claude CLI kroz WebSocket
+- Streaming odgovori (NDJSON parsiranje)
+- Sesija živi nezavisno od browser-a (reconnect replay)
+- Sidebar sa .md fajlovima projekta
+- Markdown renderovanje (goldmark)
+- Dark tema
+
+## Testovi
+
+```bash
+go test ./... -v -count=1
+```
+
+## Tech stack
+
+- Go 1.23+
+- htmx 2.0.4 (vendored)
+- gorilla/websocket
+- goldmark (Markdown)
diff --git a/TESTING.md b/TESTING.md
new file mode 100644
index 0000000..5667999
--- /dev/null
+++ b/TESTING.md
@@ -0,0 +1,37 @@
+# TESTING.md — Claude Web Chat
+
+## Login
+- [ ] Otvaranje / → redirect na /login
+- [ ] Login sa ispravnim kredencijalima → redirect na /projects
+- [ ] Login sa pogrešnim kredencijalima → error poruka
+- [ ] Već ulogovan → /login redirect na /projects
+- [ ] Logout → sesija obrisana, redirect na /login
+- [ ] Pristup /projects bez logina → redirect na /login
+
+## Projekti
+- [ ] Lista projekata se prikazuje posle logina
+- [ ] Projekat sa README.md prikazuje opis
+- [ ] Projekat bez README.md prikazuje "Bez opisa"
+- [ ] Klik na projekat → otvara chat
+
+## Chat
+- [ ] Chat stranica se otvori sa WebSocket konekcijom
+- [ ] Pošalji poruku → prikazuje se user poruka
+- [ ] Claude odgovara → streaming tekst u realnom vremenu
+- [ ] Tool use → prikazuje se kao posebna poruka
+- [ ] Typing indicator → prikazuje se dok Claude radi
+- [ ] Enter → šalje poruku, Shift+Enter → novi red
+- [ ] Input se čisti posle slanja
+
+## Sesija persistence
+- [ ] Zatvori tab → otvori ponovo → sesija živa, poruke replayed
+- [ ] Idle sesija se čisti posle 30 minuta
+
+## File browser
+- [ ] Sidebar prikazuje .md fajlove
+- [ ] Klik na fajl → otvara viewer sa rendered markdown-om
+- [ ] Escape zatvara viewer
+- [ ] Path traversal pokušaj → blokiran
+
+## Unit testovi
+- [ ] `go test ./... -v -count=1` — svi prolaze
diff --git a/auth.go b/auth.go
new file mode 100644
index 0000000..f9f6b62
--- /dev/null
+++ b/auth.go
@@ -0,0 +1,127 @@
+package main
+
+import (
+	"crypto/hmac"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/hex"
+	"net/http"
+	"sync"
+	"time"
+)
+
+const (
+	sessionCookieName = "cwc_session"
+	sessionMaxAge     = 24 * time.Hour
+)
+
+type Session struct {
+	Token     string
+	Username  string
+	CreatedAt time.Time
+}
+
+type SessionManager struct {
+	sessions map[string]*Session
+	secret   string
+	mu       sync.RWMutex
+}
+
+func NewSessionManager(secret string) *SessionManager {
+	return &SessionManager{
+		sessions: make(map[string]*Session),
+		secret:   secret,
+	}
+}
+
+func (sm *SessionManager) Create(username string) *Session {
+	token := generateToken()
+	sig := sm.sign(token)
+	signedToken := token + "." + sig
+
+	sess := &Session{
+		Token:     signedToken,
+		Username:  username,
+		CreatedAt: time.Now(),
+	}
+
+	sm.mu.Lock()
+	sm.sessions[signedToken] = sess
+	sm.mu.Unlock()
+
+	return sess
+}
+
+func (sm *SessionManager) Get(token string) *Session {
+	sm.mu.RLock()
+	sess, ok := sm.sessions[token]
+	sm.mu.RUnlock()
+
+	if !ok {
+		return nil
+	}
+	if time.Since(sess.CreatedAt) > sessionMaxAge {
+		sm.Delete(token)
+		return nil
+	}
+	return sess
+}
+
+func (sm *SessionManager) Delete(token string) {
+	sm.mu.Lock()
+	delete(sm.sessions, token)
+	sm.mu.Unlock()
+}
+
+func (sm *SessionManager) sign(token string) string {
+	h := hmac.New(sha256.New, []byte(sm.secret))
+	h.Write([]byte(token))
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+func generateToken() string {
+	b := make([]byte, 32)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+// SetSessionCookie sets the session cookie on the response.
+func SetSessionCookie(w http.ResponseWriter, sess *Session) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     sessionCookieName,
+		Value:    sess.Token,
+		Path:     "/",
+		HttpOnly: true,
+		SameSite: http.SameSiteLaxMode,
+		MaxAge:   int(sessionMaxAge.Seconds()),
+	})
+}
+
+// ClearSessionCookie removes the session cookie.
+func ClearSessionCookie(w http.ResponseWriter) {
+	http.SetCookie(w, &http.Cookie{
+		Name:     sessionCookieName,
+		Value:    "",
+		Path:     "/",
+		HttpOnly: true,
+		MaxAge:   -1,
+	})
+}
+
+// AuthMiddleware protects routes that require authentication.
+func AuthMiddleware(sm *SessionManager, next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		cookie, err := r.Cookie(sessionCookieName)
+		if err != nil {
+			http.Redirect(w, r, "/login", http.StatusSeeOther)
+			return
+		}
+		sess := sm.Get(cookie.Value)
+		if sess == nil {
+			ClearSessionCookie(w)
+			http.Redirect(w, r, "/login", http.StatusSeeOther)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}
diff --git a/auth_test.go b/auth_test.go
new file mode 100644
index 0000000..5821b4b
--- /dev/null
+++ b/auth_test.go
@@ -0,0 +1,148 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+)
+
+func TestSessionManager(t *testing.T) {
+	sm := NewSessionManager("test-secret")
+
+	t.Run("create and get session", func(t *testing.T) {
+		sess := sm.Create("admin")
+		if sess.Username != "admin" {
+			t.Errorf("username = %q, want admin", sess.Username)
+		}
+		if sess.Token == "" {
+			t.Fatal("token is empty")
+		}
+
+		got := sm.Get(sess.Token)
+		if got == nil {
+			t.Fatal("session not found")
+		}
+		if got.Username != "admin" {
+			t.Errorf("username = %q, want admin", got.Username)
+		}
+	})
+
+	t.Run("get nonexistent session", func(t *testing.T) {
+		got := sm.Get("nonexistent")
+		if got != nil {
+			t.Error("expected nil for nonexistent session")
+		}
+	})
+
+	t.Run("delete session", func(t *testing.T) {
+		sess := sm.Create("user1")
+		sm.Delete(sess.Token)
+		got := sm.Get(sess.Token)
+		if got != nil {
+			t.Error("expected nil after delete")
+		}
+	})
+
+	t.Run("expired session", func(t *testing.T) {
+		sess := sm.Create("user2")
+		// Manually set old creation time
+		sm.mu.Lock()
+		sm.sessions[sess.Token].CreatedAt = time.Now().Add(-25 * time.Hour)
+		sm.mu.Unlock()
+
+		got := sm.Get(sess.Token)
+		if got != nil {
+			t.Error("expected nil for expired session")
+		}
+	})
+
+	t.Run("unique tokens", func(t *testing.T) {
+		s1 := sm.Create("a")
+		s2 := sm.Create("b")
+		if s1.Token == s2.Token {
+			t.Error("tokens should be unique")
+		}
+	})
+}
+
+func TestAuthMiddleware(t *testing.T) {
+	sm := NewSessionManager("test-secret")
+	sess := sm.Create("admin")
+
+	protected := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("ok"))
+	})
+
+	handler := AuthMiddleware(sm, protected)
+
+	t.Run("no cookie redirects to login", func(t *testing.T) {
+		req := httptest.NewRequest("GET", "/projects", nil)
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusSeeOther {
+			t.Errorf("status = %d, want %d", w.Code, http.StatusSeeOther)
+		}
+		loc := w.Header().Get("Location")
+		if loc != "/login" {
+			t.Errorf("location = %q, want /login", loc)
+		}
+	})
+
+	t.Run("invalid cookie redirects to login", func(t *testing.T) {
+		req := httptest.NewRequest("GET", "/projects", nil)
+		req.AddCookie(&http.Cookie{Name: sessionCookieName, Value: "invalid"})
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusSeeOther {
+			t.Errorf("status = %d, want %d", w.Code, http.StatusSeeOther)
+		}
+	})
+
+	t.Run("valid cookie passes through", func(t *testing.T) {
+		req := httptest.NewRequest("GET", "/projects", nil)
+		req.AddCookie(&http.Cookie{Name: sessionCookieName, Value: sess.Token})
+		w := httptest.NewRecorder()
+		handler.ServeHTTP(w, req)
+
+		if w.Code != http.StatusOK {
+			t.Errorf("status = %d, want %d", w.Code, http.StatusOK)
+		}
+	})
+}
+
+func TestSetSessionCookie(t *testing.T) {
+	sess := &Session{Token: "test-token", Username: "admin"}
+	w := httptest.NewRecorder()
+	SetSessionCookie(w, sess)
+
+	cookies := w.Result().Cookies()
+	if len(cookies) != 1 {
+		t.Fatalf("expected 1 cookie, got %d", len(cookies))
+	}
+	if cookies[0].Name != sessionCookieName {
+		t.Errorf("cookie name = %q", cookies[0].Name)
+	}
+	if cookies[0].Value != "test-token" {
+		t.Errorf("cookie value = %q", cookies[0].Value)
+	}
+	if !cookies[0].HttpOnly {
+		t.Error("expected HttpOnly")
+	}
+}
+
+func TestClearSessionCookie(t *testing.T) {
+	w := httptest.NewRecorder()
+	ClearSessionCookie(w)
+
+	cookies := w.Result().Cookies()
+	if len(cookies) != 1 {
+		t.Fatalf("expected 1 cookie, got %d", len(cookies))
+	}
+	if cookies[0].MaxAge != -1 {
+		t.Errorf("MaxAge = %d, want -1", cookies[0].MaxAge)
+	}
+}
diff --git a/claude_cli.go b/claude_cli.go
new file mode 100644
index 0000000..f2d4761
--- /dev/null
+++ b/claude_cli.go
@@ -0,0 +1,196 @@
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"sync"
+)
+
+// CLIEvent represents a parsed NDJSON event from claude CLI stdout.
+type CLIEvent struct {
+	Type    string `json:"type"`
+	Subtype string `json:"subtype,omitempty"`
+
+	// For assistant message events
+	Message *CLIMessage `json:"message,omitempty"`
+
+	// For content_block_delta
+	Index int       `json:"index,omitempty"`
+	Delta *CLIDelta `json:"delta,omitempty"`
+
+	// For result events
+	Result *CLIResult `json:"result,omitempty"`
+}
+
+type CLIMessage struct {
+	Role    string       `json:"role,omitempty"`
+	Content []CLIContent `json:"content,omitempty"`
+}
+
+type CLIContent struct {
+	Type  string `json:"type"`
+	Text  string `json:"text,omitempty"`
+	Name  string `json:"name,omitempty"`
+	Input any    `json:"input,omitempty"`
+	ID    string `json:"id,omitempty"`
+}
+
+type CLIDelta struct {
+	Type string `json:"type"`
+	Text string `json:"text,omitempty"`
+}
+
+type CLIResult struct {
+	Duration  float64 `json:"duration_ms,omitempty"`
+	NumTurns  int     `json:"num_turns,omitempty"`
+	CostUSD   float64 `json:"cost_usd,omitempty"`
+	SessionID string  `json:"session_id,omitempty"`
+}
+
+// CLIProcess manages a running claude CLI process.
+type CLIProcess struct {
+	cmd    *exec.Cmd
+	stdin  io.WriteCloser
+	stdout io.ReadCloser
+	stderr io.ReadCloser
+
+	Events chan CLIEvent
+	Errors chan error
+
+	done chan struct{}
+	mu   sync.Mutex
+}
+
+// SpawnCLI starts a new claude CLI process for the given project directory.
+func SpawnCLI(projectDir string) (*CLIProcess, error) {
+	args := []string{
+		"-p",
+		"--output-format", "stream-json",
+		"--verbose",
+	}
+
+	cmd := exec.Command("claude", args...)
+	cmd.Dir = projectDir
+
+	// Filter CLAUDECODE env var to prevent nested session detection
+	env := filterEnv(os.Environ(), "CLAUDECODE")
+	cmd.Env = env
+
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return nil, fmt.Errorf("stdin pipe: %w", err)
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, fmt.Errorf("stdout pipe: %w", err)
+	}
+
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, fmt.Errorf("stderr pipe: %w", err)
+	}
+
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("start claude: %w", err)
+	}
+
+	cp := &CLIProcess{
+		cmd:    cmd,
+		stdin:  stdin,
+		stdout: stdout,
+		stderr: stderr,
+		Events: make(chan CLIEvent, 100),
+		Errors: make(chan error, 10),
+		done:   make(chan struct{}),
+	}
+
+	go cp.readOutput()
+	go cp.readErrors()
+
+	return cp, nil
+}
+
+// Send writes a message to the claude CLI process stdin.
+func (cp *CLIProcess) Send(message string) error {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	msg := strings.TrimSpace(message) + "\n"
+	_, err := io.WriteString(cp.stdin, msg)
+	return err
+}
+
+// Close terminates the claude CLI process.
+func (cp *CLIProcess) Close() error {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	cp.stdin.Close()
+	return cp.cmd.Process.Kill()
+}
+
+// Done returns a channel that's closed when the process exits.
+func (cp *CLIProcess) Done() <-chan struct{} {
+	return cp.done
+}
+
+func (cp *CLIProcess) readOutput() {
+	defer close(cp.done)
+	defer close(cp.Events)
+
+	scanner := bufio.NewScanner(cp.stdout)
+	scanner.Buffer(make([]byte, 0, 1024*1024), 1024*1024) // 1MB buffer
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line == "" {
+			continue
+		}
+
+		var event CLIEvent
+		if err := json.Unmarshal([]byte(line), &event); err != nil {
+			cp.Errors <- fmt.Errorf("parse event: %w (line: %s)", err, truncate(line, 200))
+			continue
+		}
+		cp.Events <- event
+	}
+
+	if err := scanner.Err(); err != nil {
+		cp.Errors <- fmt.Errorf("scanner: %w", err)
+	}
+}
+
+func (cp *CLIProcess) readErrors() {
+	scanner := bufio.NewScanner(cp.stderr)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if line != "" {
+			cp.Errors <- fmt.Errorf("stderr: %s", line)
+		}
+	}
+}
+
+// filterEnv returns a copy of env with the named variable removed.
+func filterEnv(env []string, name string) []string {
+	prefix := name + "="
+	result := make([]string, 0, len(env))
+	for _, e := range env {
+		if !strings.HasPrefix(e, prefix) {
+			result = append(result, e)
+		}
+	}
+	return result
+}
+
+func truncate(s string, n int) string {
+	if len(s) <= n {
+		return s
+	}
+	return s[:n] + "..."
+}
diff --git a/claude_cli_test.go b/claude_cli_test.go
new file mode 100644
index 0000000..cb0e013
--- /dev/null
+++ b/claude_cli_test.go
@@ -0,0 +1,126 @@
+package main
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestFilterEnv(t *testing.T) {
+	env := []string{
+		"PATH=/usr/bin",
+		"HOME=/root",
+		"CLAUDECODE=1",
+		"OTHER=value",
+	}
+
+	filtered := filterEnv(env, "CLAUDECODE")
+
+	if len(filtered) != 3 {
+		t.Fatalf("got %d entries, want 3", len(filtered))
+	}
+
+	for _, e := range filtered {
+		if e == "CLAUDECODE=1" {
+			t.Error("CLAUDECODE should be filtered out")
+		}
+	}
+}
+
+func TestFilterEnvNotPresent(t *testing.T) {
+	env := []string{"PATH=/usr/bin", "HOME=/root"}
+	filtered := filterEnv(env, "CLAUDECODE")
+	if len(filtered) != 2 {
+		t.Fatalf("got %d entries, want 2", len(filtered))
+	}
+}
+
+func TestTruncate(t *testing.T) {
+	tests := []struct {
+		input string
+		n     int
+		want  string
+	}{
+		{"hello", 10, "hello"},
+		{"hello world", 5, "hello..."},
+		{"", 5, ""},
+	}
+	for _, tt := range tests {
+		got := truncate(tt.input, tt.n)
+		if got != tt.want {
+			t.Errorf("truncate(%q, %d) = %q, want %q", tt.input, tt.n, got, tt.want)
+		}
+	}
+}
+
+func TestCLIEventParsing(t *testing.T) {
+	t.Run("assistant message", func(t *testing.T) {
+		raw := `{"type":"assistant","message":{"role":"assistant","content":[{"type":"text","text":"Hello!"}]}}`
+		var event CLIEvent
+		if err := json.Unmarshal([]byte(raw), &event); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		if event.Type != "assistant" {
+			t.Errorf("type = %q", event.Type)
+		}
+		if event.Message == nil {
+			t.Fatal("message is nil")
+		}
+		if len(event.Message.Content) != 1 {
+			t.Fatalf("content length = %d", len(event.Message.Content))
+		}
+		if event.Message.Content[0].Text != "Hello!" {
+			t.Errorf("text = %q", event.Message.Content[0].Text)
+		}
+	})
+
+	t.Run("content_block_delta", func(t *testing.T) {
+		raw := `{"type":"content_block_delta","index":0,"delta":{"type":"text_delta","text":"chunk"}}`
+		var event CLIEvent
+		if err := json.Unmarshal([]byte(raw), &event); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		if event.Type != "content_block_delta" {
+			t.Errorf("type = %q", event.Type)
+		}
+		if event.Delta == nil {
+			t.Fatal("delta is nil")
+		}
+		if event.Delta.Text != "chunk" {
+			t.Errorf("text = %q", event.Delta.Text)
+		}
+	})
+
+	t.Run("result event", func(t *testing.T) {
+		raw := `{"type":"result","subtype":"success","result":{"duration_ms":1234.5,"num_turns":3,"cost_usd":0.05,"session_id":"abc123"}}`
+		var event CLIEvent
+		if err := json.Unmarshal([]byte(raw), &event); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		if event.Type != "result" {
+			t.Errorf("type = %q", event.Type)
+		}
+		if event.Subtype != "success" {
+			t.Errorf("subtype = %q", event.Subtype)
+		}
+		if event.Result == nil {
+			t.Fatal("result is nil")
+		}
+		if event.Result.SessionID != "abc123" {
+			t.Errorf("session_id = %q", event.Result.SessionID)
+		}
+	})
+
+	t.Run("tool_use content", func(t *testing.T) {
+		raw := `{"type":"assistant","message":{"role":"assistant","content":[{"type":"tool_use","name":"Read","id":"tool1","input":{"file_path":"/tmp/test.go"}}]}}`
+		var event CLIEvent
+		if err := json.Unmarshal([]byte(raw), &event); err != nil {
+			t.Fatalf("unmarshal: %v", err)
+		}
+		if event.Message.Content[0].Type != "tool_use" {
+			t.Errorf("content type = %q", event.Message.Content[0].Type)
+		}
+		if event.Message.Content[0].Name != "Read" {
+			t.Errorf("name = %q", event.Message.Content[0].Name)
+		}
+	})
+}
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..fda41e0
--- /dev/null
+++ b/config.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+type APIConfig struct {
+	Key   string `json:"key"`
+	Model string `json:"model"`
+}
+
+type Config struct {
+	Port          int       `json:"port"`
+	Mode          string    `json:"mode"`
+	ProjectsPath  string    `json:"projects_path"`
+	Username      string    `json:"username"`
+	Password      string    `json:"password"`
+	SessionSecret string    `json:"session_secret"`
+	API           APIConfig `json:"api"`
+}
+
+func LoadConfig(path string) (*Config, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, fmt.Errorf("reading config: %w", err)
+	}
+
+	var cfg Config
+	if err := json.Unmarshal(data, &cfg); err != nil {
+		return nil, fmt.Errorf("parsing config: %w", err)
+	}
+
+	if cfg.Port == 0 {
+		cfg.Port = 9100
+	}
+	if cfg.Mode == "" {
+		cfg.Mode = "cli"
+	}
+	if cfg.ProjectsPath == "" {
+		cfg.ProjectsPath = "/root/projects"
+	}
+	if cfg.Username == "" {
+		return nil, fmt.Errorf("username is required")
+	}
+	if cfg.Password == "" {
+		return nil, fmt.Errorf("password is required")
+	}
+	if cfg.SessionSecret == "" {
+		return nil, fmt.Errorf("session_secret is required")
+	}
+
+	return &cfg, nil
+}
diff --git a/config.json.example b/config.json.example
new file mode 100644
index 0000000..00896f9
--- /dev/null
+++ b/config.json.example
@@ -0,0 +1,12 @@
+{
+    "port": 9100,
+    "mode": "cli",
+    "projects_path": "/root/projects",
+    "username": "",
+    "password": "",
+    "session_secret": "",
+    "api": {
+        "key": "",
+        "model": "claude-sonnet-4-20250514"
+    }
+}
diff --git a/config_test.go b/config_test.go
new file mode 100644
index 0000000..3e1e8d9
--- /dev/null
+++ b/config_test.go
@@ -0,0 +1,131 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadConfig(t *testing.T) {
+	dir := t.TempDir()
+	cfgPath := filepath.Join(dir, "config.json")
+
+	t.Run("valid config", func(t *testing.T) {
+		data := `{
+			"port": 9100,
+			"mode": "cli",
+			"projects_path": "/tmp/projects",
+			"username": "admin",
+			"password": "secret",
+			"session_secret": "abc123"
+		}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		cfg, err := LoadConfig(cfgPath)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if cfg.Port != 9100 {
+			t.Errorf("port = %d, want 9100", cfg.Port)
+		}
+		if cfg.Mode != "cli" {
+			t.Errorf("mode = %q, want cli", cfg.Mode)
+		}
+		if cfg.ProjectsPath != "/tmp/projects" {
+			t.Errorf("projects_path = %q, want /tmp/projects", cfg.ProjectsPath)
+		}
+	})
+
+	t.Run("defaults applied", func(t *testing.T) {
+		data := `{
+			"username": "admin",
+			"password": "secret",
+			"session_secret": "abc123"
+		}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		cfg, err := LoadConfig(cfgPath)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if cfg.Port != 9100 {
+			t.Errorf("port = %d, want 9100", cfg.Port)
+		}
+		if cfg.Mode != "cli" {
+			t.Errorf("mode = %q, want cli", cfg.Mode)
+		}
+		if cfg.ProjectsPath != "/root/projects" {
+			t.Errorf("projects_path = %q, want /root/projects", cfg.ProjectsPath)
+		}
+	})
+
+	t.Run("missing username", func(t *testing.T) {
+		data := `{"password": "secret", "session_secret": "abc"}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		_, err := LoadConfig(cfgPath)
+		if err == nil {
+			t.Fatal("expected error for missing username")
+		}
+	})
+
+	t.Run("missing password", func(t *testing.T) {
+		data := `{"username": "admin", "session_secret": "abc"}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		_, err := LoadConfig(cfgPath)
+		if err == nil {
+			t.Fatal("expected error for missing password")
+		}
+	})
+
+	t.Run("missing session_secret", func(t *testing.T) {
+		data := `{"username": "admin", "password": "secret"}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		_, err := LoadConfig(cfgPath)
+		if err == nil {
+			t.Fatal("expected error for missing session_secret")
+		}
+	})
+
+	t.Run("file not found", func(t *testing.T) {
+		_, err := LoadConfig("/nonexistent/config.json")
+		if err == nil {
+			t.Fatal("expected error for missing file")
+		}
+	})
+
+	t.Run("invalid json", func(t *testing.T) {
+		os.WriteFile(cfgPath, []byte("{invalid"), 0644)
+
+		_, err := LoadConfig(cfgPath)
+		if err == nil {
+			t.Fatal("expected error for invalid JSON")
+		}
+	})
+
+	t.Run("api config", func(t *testing.T) {
+		data := `{
+			"username": "admin",
+			"password": "secret",
+			"session_secret": "abc123",
+			"api": {
+				"key": "sk-ant-xxx",
+				"model": "claude-sonnet-4-20250514"
+			}
+		}`
+		os.WriteFile(cfgPath, []byte(data), 0644)
+
+		cfg, err := LoadConfig(cfgPath)
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+		if cfg.API.Key != "sk-ant-xxx" {
+			t.Errorf("api.key = %q, want sk-ant-xxx", cfg.API.Key)
+		}
+		if cfg.API.Model != "claude-sonnet-4-20250514" {
+			t.Errorf("api.model = %q", cfg.API.Model)
+		}
+	})
+}
diff --git a/files.go b/files.go
new file mode 100644
index 0000000..009e7dd
--- /dev/null
+++ b/files.go
@@ -0,0 +1,111 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+
+	"github.com/yuin/goldmark"
+)
+
+type FileInfo struct {
+	Name     string
+	Path     string
+	RelPath  string
+	IsDir    bool
+	Size     int64
+}
+
+// ListMarkdownFiles returns all .md files in the project directory (non-recursive).
+func ListMarkdownFiles(projectDir string) ([]FileInfo, error) {
+	entries, err := os.ReadDir(projectDir)
+	if err != nil {
+		return nil, err
+	}
+
+	var files []FileInfo
+	for _, e := range entries {
+		if e.IsDir() {
+			continue
+		}
+		if !strings.HasSuffix(strings.ToLower(e.Name()), ".md") {
+			continue
+		}
+		info, err := e.Info()
+		if err != nil {
+			continue
+		}
+		files = append(files, FileInfo{
+			Name:    e.Name(),
+			Path:    filepath.Join(projectDir, e.Name()),
+			RelPath: e.Name(),
+			Size:    info.Size(),
+		})
+	}
+
+	// Also check docs/ subdirectory
+	docsDir := filepath.Join(projectDir, "docs")
+	if docEntries, err := os.ReadDir(docsDir); err == nil {
+		for _, e := range docEntries {
+			if e.IsDir() {
+				continue
+			}
+			if !strings.HasSuffix(strings.ToLower(e.Name()), ".md") {
+				continue
+			}
+			info, err := e.Info()
+			if err != nil {
+				continue
+			}
+			files = append(files, FileInfo{
+				Name:    "docs/" + e.Name(),
+				Path:    filepath.Join(docsDir, e.Name()),
+				RelPath: "docs/" + e.Name(),
+				Size:    info.Size(),
+			})
+		}
+	}
+
+	sort.Slice(files, func(i, j int) bool {
+		return files[i].Name < files[j].Name
+	})
+
+	return files, nil
+}
+
+// ReadFileContent reads a file and returns its content.
+// It validates that the file is within the project directory (path traversal protection).
+func ReadFileContent(projectDir, relPath string) (string, error) {
+	absPath := filepath.Join(projectDir, relPath)
+	absPath = filepath.Clean(absPath)
+
+	// Path traversal protection
+	if !strings.HasPrefix(absPath, filepath.Clean(projectDir)) {
+		return "", fmt.Errorf("path traversal detected")
+	}
+
+	data, err := os.ReadFile(absPath)
+	if err != nil {
+		return "", err
+	}
+
+	return string(data), nil
+}
+
+// RenderMarkdownFile reads a markdown file and returns rendered HTML.
+func RenderMarkdownFile(projectDir, relPath string) (string, error) {
+	content, err := ReadFileContent(projectDir, relPath)
+	if err != nil {
+		return "", err
+	}
+
+	var buf bytes.Buffer
+	if err := goldmark.Convert([]byte(content), &buf); err != nil {
+		return "", fmt.Errorf("render markdown: %w", err)
+	}
+
+	return buf.String(), nil
+}
diff --git a/files_test.go b/files_test.go
new file mode 100644
index 0000000..7af9b86
--- /dev/null
+++ b/files_test.go
@@ -0,0 +1,125 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestListMarkdownFiles(t *testing.T) {
+	dir := t.TempDir()
+
+	// Create test files
+	os.WriteFile(filepath.Join(dir, "README.md"), []byte("# Hello"), 0644)
+	os.WriteFile(filepath.Join(dir, "SPEC.md"), []byte("# Spec"), 0644)
+	os.WriteFile(filepath.Join(dir, "main.go"), []byte("package main"), 0644)
+
+	// Create docs subdirectory
+	os.MkdirAll(filepath.Join(dir, "docs"), 0755)
+	os.WriteFile(filepath.Join(dir, "docs", "ARCHITECTURE.md"), []byte("# Arch"), 0644)
+	os.WriteFile(filepath.Join(dir, "docs", "notes.txt"), []byte("not md"), 0644)
+
+	t.Run("lists only .md files", func(t *testing.T) {
+		files, err := ListMarkdownFiles(dir)
+		if err != nil {
+			t.Fatalf("ListMarkdownFiles: %v", err)
+		}
+		if len(files) != 3 {
+			t.Fatalf("got %d files, want 3", len(files))
+		}
+	})
+
+	t.Run("includes docs subdir", func(t *testing.T) {
+		files, err := ListMarkdownFiles(dir)
+		if err != nil {
+			t.Fatalf("ListMarkdownFiles: %v", err)
+		}
+		found := false
+		for _, f := range files {
+			if f.Name == "docs/ARCHITECTURE.md" {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Error("should include docs/ARCHITECTURE.md")
+		}
+	})
+
+	t.Run("sorted", func(t *testing.T) {
+		files, err := ListMarkdownFiles(dir)
+		if err != nil {
+			t.Fatalf("ListMarkdownFiles: %v", err)
+		}
+		for i := 1; i < len(files); i++ {
+			if files[i].Name < files[i-1].Name {
+				t.Errorf("not sorted: %q before %q", files[i-1].Name, files[i].Name)
+			}
+		}
+	})
+
+	t.Run("nonexistent dir", func(t *testing.T) {
+		_, err := ListMarkdownFiles("/nonexistent")
+		if err == nil {
+			t.Fatal("expected error")
+		}
+	})
+}
+
+func TestReadFileContent(t *testing.T) {
+	dir := t.TempDir()
+	os.WriteFile(filepath.Join(dir, "test.md"), []byte("hello world"), 0644)
+
+	t.Run("reads file", func(t *testing.T) {
+		content, err := ReadFileContent(dir, "test.md")
+		if err != nil {
+			t.Fatalf("ReadFileContent: %v", err)
+		}
+		if content != "hello world" {
+			t.Errorf("content = %q", content)
+		}
+	})
+
+	t.Run("path traversal blocked", func(t *testing.T) {
+		_, err := ReadFileContent(dir, "../../etc/passwd")
+		if err == nil {
+			t.Fatal("expected error for path traversal")
+		}
+		if !strings.Contains(err.Error(), "path traversal") {
+			t.Errorf("error = %v, want path traversal error", err)
+		}
+	})
+
+	t.Run("file not found", func(t *testing.T) {
+		_, err := ReadFileContent(dir, "nonexistent.md")
+		if err == nil {
+			t.Fatal("expected error for nonexistent file")
+		}
+	})
+}
+
+func TestRenderMarkdownFile(t *testing.T) {
+	dir := t.TempDir()
+	os.WriteFile(filepath.Join(dir, "test.md"), []byte("# Hello\n\nWorld"), 0644)
+
+	t.Run("renders markdown", func(t *testing.T) {
+		html, err := RenderMarkdownFile(dir, "test.md")
+		if err != nil {
+			t.Fatalf("RenderMarkdownFile: %v", err)
+		}
+		if !strings.Contains(html, "<h1>Hello</h1>") {
+			t.Errorf("missing h1, got: %s", html)
+		}
+		if !strings.Contains(html, "<p>World</p>") {
+			t.Errorf("missing p, got: %s", html)
+		}
+	})
+
+	t.Run("path traversal blocked", func(t *testing.T) {
+		_, err := RenderMarkdownFile(dir, "../../../etc/passwd")
+		if err == nil {
+			t.Fatal("expected error for path traversal")
+		}
+	})
+}
diff --git a/fragments.go b/fragments.go
new file mode 100644
index 0000000..f8e2569
--- /dev/null
+++ b/fragments.go
@@ -0,0 +1,71 @@
+package main
+
+import (
+	"fmt"
+	"html"
+	"strings"
+)
+
+// FragmentUserMessage returns an HTML fragment for a user message.
+func FragmentUserMessage(text string) string {
+	escaped := html.EscapeString(text)
+	return fmt.Sprintf(`<div id="chat-messages" hx-swap-oob="beforeend"><div class="message message-user">%s</div></div>`, escaped)
+}
+
+// FragmentAssistantStart returns the opening tag for an assistant message with streaming.
+func FragmentAssistantStart(msgID string) string {
+	return fmt.Sprintf(`<div id="chat-messages" hx-swap-oob="beforeend"><div class="message message-assistant" id="%s"><div class="content"></div></div></div>`, msgID)
+}
+
+// FragmentAssistantChunk appends text to an existing assistant message.
+func FragmentAssistantChunk(msgID, textChunk string) string {
+	escaped := html.EscapeString(textChunk)
+	return fmt.Sprintf(`<div id="%s" hx-swap-oob="beforeend:.content">%s</div>`, msgID, escaped)
+}
+
+// FragmentAssistantComplete replaces the content of an assistant message with final rendered content.
+func FragmentAssistantComplete(msgID, htmlContent string) string {
+	return fmt.Sprintf(`<div id="%s" hx-swap-oob="innerHTML:.content">%s</div>`, msgID, htmlContent)
+}
+
+// FragmentToolCall returns an HTML fragment for a tool use notification.
+func FragmentToolCall(toolName string, toolInput string) string {
+	escapedName := html.EscapeString(toolName)
+	escapedInput := html.EscapeString(toolInput)
+	if len(escapedInput) > 200 {
+		escapedInput = escapedInput[:200] + "..."
+	}
+	return fmt.Sprintf(`<div id="chat-messages" hx-swap-oob="beforeend"><div class="message message-tool"><div class="tool-name">%s</div><div>%s</div></div></div>`, escapedName, escapedInput)
+}
+
+// FragmentSystemMessage returns an HTML fragment for a system message.
+func FragmentSystemMessage(text string) string {
+	escaped := html.EscapeString(text)
+	return fmt.Sprintf(`<div id="chat-messages" hx-swap-oob="beforeend"><div class="message message-system">%s</div></div>`, escaped)
+}
+
+// FragmentTypingIndicator shows or hides the typing indicator.
+func FragmentTypingIndicator(show bool) string {
+	if show {
+		return `<div id="typing-indicator" hx-swap-oob="innerHTML"><span class="typing-indicator">Claude razmišlja<span class="dots">...</span></span></div>`
+	}
+	return `<div id="typing-indicator" hx-swap-oob="innerHTML"></div>`
+}
+
+// FragmentStatus updates the connection status indicator.
+func FragmentStatus(connected bool) string {
+	if connected {
+		return `<span id="ws-status" hx-swap-oob="innerHTML" class="status connected">Povezan</span>`
+	}
+	return `<span id="ws-status" hx-swap-oob="innerHTML" class="status">Nepovezan</span>`
+}
+
+// FragmentClearInput clears the message input field.
+func FragmentClearInput() string {
+	return `<textarea id="message-input" hx-swap-oob="outerHTML" name="message" class="chat-input" placeholder="Pošalji poruku..." rows="1"></textarea>`
+}
+
+// FragmentCombine joins multiple fragments into a single response.
+func FragmentCombine(fragments ...string) string {
+	return strings.Join(fragments, "\n")
+}
diff --git a/fragments_test.go b/fragments_test.go
new file mode 100644
index 0000000..2522539
--- /dev/null
+++ b/fragments_test.go
@@ -0,0 +1,127 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestFragmentUserMessage(t *testing.T) {
+	f := FragmentUserMessage("Hello <world>")
+	if !strings.Contains(f, "message-user") {
+		t.Error("missing message-user class")
+	}
+	if !strings.Contains(f, "Hello &lt;world&gt;") {
+		t.Error("should escape HTML")
+	}
+	if !strings.Contains(f, `hx-swap-oob="beforeend"`) {
+		t.Error("missing OOB swap")
+	}
+}
+
+func TestFragmentAssistantStart(t *testing.T) {
+	f := FragmentAssistantStart("msg-1")
+	if !strings.Contains(f, `id="msg-1"`) {
+		t.Error("missing message ID")
+	}
+	if !strings.Contains(f, "message-assistant") {
+		t.Error("missing message-assistant class")
+	}
+}
+
+func TestFragmentAssistantChunk(t *testing.T) {
+	f := FragmentAssistantChunk("msg-1", "chunk<text>")
+	if !strings.Contains(f, `id="msg-1"`) {
+		t.Error("missing message ID")
+	}
+	if !strings.Contains(f, "chunk&lt;text&gt;") {
+		t.Error("should escape HTML")
+	}
+}
+
+func TestFragmentAssistantComplete(t *testing.T) {
+	f := FragmentAssistantComplete("msg-1", "<p>Hello</p>")
+	if !strings.Contains(f, `id="msg-1"`) {
+		t.Error("missing message ID")
+	}
+	if !strings.Contains(f, "<p>Hello</p>") {
+		t.Error("should include raw HTML content")
+	}
+}
+
+func TestFragmentToolCall(t *testing.T) {
+	f := FragmentToolCall("Read", "/tmp/test.go")
+	if !strings.Contains(f, "message-tool") {
+		t.Error("missing message-tool class")
+	}
+	if !strings.Contains(f, "Read") {
+		t.Error("missing tool name")
+	}
+}
+
+func TestFragmentToolCallTruncation(t *testing.T) {
+	longInput := strings.Repeat("x", 300)
+	f := FragmentToolCall("Write", longInput)
+	if !strings.Contains(f, "...") {
+		t.Error("should truncate long input")
+	}
+}
+
+func TestFragmentSystemMessage(t *testing.T) {
+	f := FragmentSystemMessage("Connected")
+	if !strings.Contains(f, "message-system") {
+		t.Error("missing message-system class")
+	}
+	if !strings.Contains(f, "Connected") {
+		t.Error("missing text")
+	}
+}
+
+func TestFragmentTypingIndicator(t *testing.T) {
+	show := FragmentTypingIndicator(true)
+	if !strings.Contains(show, "typing-indicator") {
+		t.Error("missing typing indicator")
+	}
+	if !strings.Contains(show, "razmišlja") {
+		t.Error("missing thinking text")
+	}
+
+	hide := FragmentTypingIndicator(false)
+	if !strings.Contains(hide, `id="typing-indicator"`) {
+		t.Error("missing ID")
+	}
+	if strings.Contains(hide, "razmišlja") {
+		t.Error("should not contain thinking text when hidden")
+	}
+}
+
+func TestFragmentStatus(t *testing.T) {
+	connected := FragmentStatus(true)
+	if !strings.Contains(connected, "connected") {
+		t.Error("missing connected class")
+	}
+	if !strings.Contains(connected, "Povezan") {
+		t.Error("missing connected text")
+	}
+
+	disconnected := FragmentStatus(false)
+	if strings.Contains(disconnected, "connected") {
+		t.Error("should not have connected class when disconnected")
+	}
+}
+
+func TestFragmentClearInput(t *testing.T) {
+	f := FragmentClearInput()
+	if !strings.Contains(f, `id="message-input"`) {
+		t.Error("missing input ID")
+	}
+	if !strings.Contains(f, "hx-swap-oob") {
+		t.Error("missing OOB swap")
+	}
+}
+
+func TestFragmentCombine(t *testing.T) {
+	combined := FragmentCombine("a", "b", "c")
+	if combined != "a\nb\nc" {
+		t.Errorf("got %q", combined)
+	}
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..e483728
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module claude-web-chat
+
+go 1.23.6
+
+require (
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/yuin/goldmark v1.7.8 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..79d4d52
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/yuin/goldmark v1.7.8 h1:iERMLn0/QJeHFhxSt3p6PeN9mGnvIKSpG9YYorDMnic=
+github.com/yuin/goldmark v1.7.8/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..120ced2
--- /dev/null
+++ b/main.go
@@ -0,0 +1,156 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"path/filepath"
+)
+
+var (
+	cfg        *Config
+	templates  *TemplateRenderer
+	sessionMgr *SessionManager
+	chatMgr    *ChatSessionManager
+)
+
+func main() {
+	var err error
+
+	cfg, err = LoadConfig("config.json")
+	if err != nil {
+		log.Fatalf("Config: %v", err)
+	}
+
+	templates, err = NewTemplateRenderer("templates")
+	if err != nil {
+		log.Fatalf("Templates: %v", err)
+	}
+
+	sessionMgr = NewSessionManager(cfg.SessionSecret)
+	chatMgr = NewChatSessionManager()
+	defer chatMgr.Stop()
+
+	wsHandler := NewWSHandler(chatMgr)
+
+	mux := http.NewServeMux()
+
+	// Static files
+	mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
+
+	// Public routes
+	mux.HandleFunc("GET /login", handleLoginPage)
+	mux.HandleFunc("POST /login", handleLogin)
+	mux.HandleFunc("GET /logout", handleLogout)
+
+	// Protected routes
+	mux.Handle("GET /projects", AuthMiddleware(sessionMgr, http.HandlerFunc(handleProjects)))
+	mux.Handle("GET /chat/{project}", AuthMiddleware(sessionMgr, http.HandlerFunc(handleChat)))
+	mux.Handle("GET /ws", AuthMiddleware(sessionMgr, wsHandler))
+	mux.Handle("GET /api/file", AuthMiddleware(sessionMgr, http.HandlerFunc(handleFileAPI)))
+
+	// Root redirect (exact match only)
+	mux.HandleFunc("GET /{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.Redirect(w, r, "/projects", http.StatusSeeOther)
+	})
+
+	addr := fmt.Sprintf(":%d", cfg.Port)
+	log.Printf("Claude Web Chat pokrenut na http://0.0.0.0%s (mod: %s)", addr, cfg.Mode)
+	log.Fatal(http.ListenAndServe(addr, mux))
+}
+
+func handleLoginPage(w http.ResponseWriter, r *http.Request) {
+	// If already logged in, redirect
+	if cookie, err := r.Cookie(sessionCookieName); err == nil {
+		if sessionMgr.Get(cookie.Value) != nil {
+			http.Redirect(w, r, "/projects", http.StatusSeeOther)
+			return
+		}
+	}
+	templates.Render(w, "login.html", map[string]string{"Error": ""})
+}
+
+func handleLogin(w http.ResponseWriter, r *http.Request) {
+	username := r.FormValue("username")
+	password := r.FormValue("password")
+
+	if username != cfg.Username || password != cfg.Password {
+		w.WriteHeader(http.StatusUnauthorized)
+		templates.Render(w, "login.html", map[string]string{"Error": "Pogrešno korisničko ime ili lozinka"})
+		return
+	}
+
+	sess := sessionMgr.Create(username)
+	SetSessionCookie(w, sess)
+	http.Redirect(w, r, "/projects", http.StatusSeeOther)
+}
+
+func handleLogout(w http.ResponseWriter, r *http.Request) {
+	if cookie, err := r.Cookie(sessionCookieName); err == nil {
+		sessionMgr.Delete(cookie.Value)
+	}
+	ClearSessionCookie(w)
+	http.Redirect(w, r, "/login", http.StatusSeeOther)
+}
+
+func handleProjects(w http.ResponseWriter, r *http.Request) {
+	projects, err := ListProjects(cfg.ProjectsPath)
+	if err != nil {
+		log.Printf("ListProjects error: %v", err)
+		http.Error(w, "Greška pri čitanju projekata", http.StatusInternalServerError)
+		return
+	}
+
+	data := map[string]any{
+		"Projects":     projects,
+		"ProjectsPath": cfg.ProjectsPath,
+	}
+	templates.Render(w, "projects.html", data)
+}
+
+func handleChat(w http.ResponseWriter, r *http.Request) {
+	project := r.PathValue("project")
+	if project == "" {
+		http.Redirect(w, r, "/projects", http.StatusSeeOther)
+		return
+	}
+
+	projectDir := filepath.Join(cfg.ProjectsPath, project)
+
+	files, err := ListMarkdownFiles(projectDir)
+	if err != nil {
+		log.Printf("ListMarkdownFiles error: %v", err)
+		files = nil
+	}
+
+	data := map[string]any{
+		"Project":    project,
+		"ProjectDir": projectDir,
+		"Files":      files,
+	}
+	templates.Render(w, "chat.html", data)
+}
+
+func handleFileAPI(w http.ResponseWriter, r *http.Request) {
+	project := r.URL.Query().Get("project")
+	relPath := r.URL.Query().Get("path")
+
+	if project == "" || relPath == "" {
+		http.Error(w, "missing params", http.StatusBadRequest)
+		return
+	}
+
+	projectDir := filepath.Join(cfg.ProjectsPath, project)
+	htmlContent, err := RenderMarkdownFile(projectDir, relPath)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]string{
+		"name": relPath,
+		"html": htmlContent,
+	})
+}
diff --git a/projects.go b/projects.go
new file mode 100644
index 0000000..e5f5ccc
--- /dev/null
+++ b/projects.go
@@ -0,0 +1,64 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+type Project struct {
+	Name        string
+	Path        string
+	Description string
+	HasReadme   bool
+}
+
+// ListProjects returns a sorted list of projects from the given directory.
+// Only directories are considered projects. Hidden directories (starting with .)
+// are excluded.
+func ListProjects(projectsPath string) ([]Project, error) {
+	entries, err := os.ReadDir(projectsPath)
+	if err != nil {
+		return nil, err
+	}
+
+	var projects []Project
+	for _, e := range entries {
+		if !e.IsDir() {
+			continue
+		}
+		name := e.Name()
+		if strings.HasPrefix(name, ".") {
+			continue
+		}
+
+		p := Project{
+			Name: name,
+			Path: filepath.Join(projectsPath, name),
+		}
+
+		// Try to read description from README.md first line
+		readmePath := filepath.Join(p.Path, "README.md")
+		if data, err := os.ReadFile(readmePath); err == nil {
+			p.HasReadme = true
+			lines := strings.SplitN(string(data), "\n", 3)
+			for _, line := range lines {
+				line = strings.TrimSpace(line)
+				line = strings.TrimLeft(line, "# ")
+				if line != "" {
+					p.Description = line
+					break
+				}
+			}
+		}
+
+		projects = append(projects, p)
+	}
+
+	sort.Slice(projects, func(i, j int) bool {
+		return projects[i].Name < projects[j].Name
+	})
+
+	return projects, nil
+}
diff --git a/projects_test.go b/projects_test.go
new file mode 100644
index 0000000..893bcd4
--- /dev/null
+++ b/projects_test.go
@@ -0,0 +1,99 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestListProjects(t *testing.T) {
+	dir := t.TempDir()
+
+	// Create test projects
+	os.MkdirAll(filepath.Join(dir, "alpha"), 0755)
+	os.MkdirAll(filepath.Join(dir, "beta"), 0755)
+	os.MkdirAll(filepath.Join(dir, ".hidden"), 0755)
+	os.WriteFile(filepath.Join(dir, "file.txt"), []byte("not a dir"), 0644)
+
+	// Add README to alpha
+	os.WriteFile(filepath.Join(dir, "alpha", "README.md"), []byte("# Alpha Project\nSome description"), 0644)
+
+	t.Run("lists directories only", func(t *testing.T) {
+		projects, err := ListProjects(dir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		if len(projects) != 2 {
+			t.Fatalf("got %d projects, want 2", len(projects))
+		}
+	})
+
+	t.Run("sorted alphabetically", func(t *testing.T) {
+		projects, err := ListProjects(dir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		if projects[0].Name != "alpha" {
+			t.Errorf("first = %q, want alpha", projects[0].Name)
+		}
+		if projects[1].Name != "beta" {
+			t.Errorf("second = %q, want beta", projects[1].Name)
+		}
+	})
+
+	t.Run("reads README description", func(t *testing.T) {
+		projects, err := ListProjects(dir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		if !projects[0].HasReadme {
+			t.Error("alpha should have HasReadme=true")
+		}
+		if projects[0].Description != "Alpha Project" {
+			t.Errorf("description = %q, want 'Alpha Project'", projects[0].Description)
+		}
+	})
+
+	t.Run("no README", func(t *testing.T) {
+		projects, err := ListProjects(dir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		if projects[1].HasReadme {
+			t.Error("beta should have HasReadme=false")
+		}
+		if projects[1].Description != "" {
+			t.Errorf("description = %q, want empty", projects[1].Description)
+		}
+	})
+
+	t.Run("excludes hidden dirs", func(t *testing.T) {
+		projects, err := ListProjects(dir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		for _, p := range projects {
+			if p.Name == ".hidden" {
+				t.Error("should not include hidden directories")
+			}
+		}
+	})
+
+	t.Run("nonexistent directory", func(t *testing.T) {
+		_, err := ListProjects("/nonexistent/path")
+		if err == nil {
+			t.Fatal("expected error for nonexistent dir")
+		}
+	})
+
+	t.Run("empty directory", func(t *testing.T) {
+		emptyDir := t.TempDir()
+		projects, err := ListProjects(emptyDir)
+		if err != nil {
+			t.Fatalf("ListProjects: %v", err)
+		}
+		if len(projects) != 0 {
+			t.Errorf("got %d projects, want 0", len(projects))
+		}
+	})
+}
diff --git a/sessions.go b/sessions.go
new file mode 100644
index 0000000..318f621
--- /dev/null
+++ b/sessions.go
@@ -0,0 +1,227 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"sync"
+	"time"
+)
+
+const (
+	maxIdleTime     = 30 * time.Minute
+	maxBufferSize   = 500
+	cleanupInterval = 5 * time.Minute
+)
+
+// ChatMessage represents a single message in the chat history.
+type ChatMessage struct {
+	Role      string    // "user", "assistant", "system", "tool"
+	Content   string    // HTML fragment
+	Timestamp time.Time
+}
+
+// Subscriber receives broadcast messages via a channel.
+type Subscriber struct {
+	Ch chan string
+	ID string
+}
+
+// ChatSession holds the state for a single chat with a project.
+type ChatSession struct {
+	ID         string
+	ProjectDir string
+	Process    *CLIProcess
+	Buffer     []ChatMessage
+	LastActive time.Time
+	Streaming  bool // true while Claude is generating
+
+	subscribers map[string]*Subscriber
+	mu          sync.Mutex
+}
+
+// AddMessage appends a message to the buffer and broadcasts to subscribers.
+func (cs *ChatSession) AddMessage(msg ChatMessage) {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+
+	cs.Buffer = append(cs.Buffer, msg)
+	if len(cs.Buffer) > maxBufferSize {
+		cs.Buffer = cs.Buffer[len(cs.Buffer)-maxBufferSize:]
+	}
+	cs.LastActive = time.Now()
+
+	// Broadcast to all subscribers
+	for id, sub := range cs.subscribers {
+		select {
+		case sub.Ch <- msg.Content:
+		default:
+			log.Printf("Subscriber %s buffer full, skipping", id)
+		}
+	}
+}
+
+// GetBuffer returns a copy of the message buffer.
+func (cs *ChatSession) GetBuffer() []ChatMessage {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+
+	buf := make([]ChatMessage, len(cs.Buffer))
+	copy(buf, cs.Buffer)
+	return buf
+}
+
+// Subscribe adds a new subscriber and returns it.
+func (cs *ChatSession) Subscribe(id string) *Subscriber {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+
+	sub := &Subscriber{
+		Ch: make(chan string, 100),
+		ID: id,
+	}
+	if cs.subscribers == nil {
+		cs.subscribers = make(map[string]*Subscriber)
+	}
+	cs.subscribers[id] = sub
+	return sub
+}
+
+// Unsubscribe removes a subscriber.
+func (cs *ChatSession) Unsubscribe(id string) {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+
+	if sub, ok := cs.subscribers[id]; ok {
+		close(sub.Ch)
+		delete(cs.subscribers, id)
+	}
+}
+
+// SubscriberCount returns the number of active subscribers.
+func (cs *ChatSession) SubscriberCount() int {
+	cs.mu.Lock()
+	defer cs.mu.Unlock()
+	return len(cs.subscribers)
+}
+
+// ChatSessionManager manages all active chat sessions.
+type ChatSessionManager struct {
+	sessions map[string]*ChatSession
+	mu       sync.RWMutex
+	stopCh   chan struct{}
+}
+
+func NewChatSessionManager() *ChatSessionManager {
+	csm := &ChatSessionManager{
+		sessions: make(map[string]*ChatSession),
+		stopCh:   make(chan struct{}),
+	}
+	go csm.cleanup()
+	return csm
+}
+
+// GetOrCreate returns an existing session or creates a new one.
+func (csm *ChatSessionManager) GetOrCreate(sessionID, projectDir string) (*ChatSession, bool, error) {
+	csm.mu.Lock()
+	defer csm.mu.Unlock()
+
+	if sess, ok := csm.sessions[sessionID]; ok {
+		sess.mu.Lock()
+		sess.LastActive = time.Now()
+		sess.mu.Unlock()
+		return sess, false, nil
+	}
+
+	// Spawn new CLI process
+	proc, err := SpawnCLI(projectDir)
+	if err != nil {
+		return nil, false, fmt.Errorf("spawn CLI: %w", err)
+	}
+
+	sess := &ChatSession{
+		ID:          sessionID,
+		ProjectDir:  projectDir,
+		Process:     proc,
+		Buffer:      make([]ChatMessage, 0),
+		LastActive:  time.Now(),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	csm.sessions[sessionID] = sess
+	return sess, true, nil
+}
+
+// Get returns an existing session or nil.
+func (csm *ChatSessionManager) Get(sessionID string) *ChatSession {
+	csm.mu.RLock()
+	defer csm.mu.RUnlock()
+	return csm.sessions[sessionID]
+}
+
+// Remove terminates and removes a session.
+func (csm *ChatSessionManager) Remove(sessionID string) {
+	csm.mu.Lock()
+	sess, ok := csm.sessions[sessionID]
+	if ok {
+		delete(csm.sessions, sessionID)
+	}
+	csm.mu.Unlock()
+
+	if ok && sess.Process != nil {
+		sess.Process.Close()
+	}
+}
+
+// Stop shuts down the manager and all sessions.
+func (csm *ChatSessionManager) Stop() {
+	close(csm.stopCh)
+
+	csm.mu.Lock()
+	for id, sess := range csm.sessions {
+		if sess.Process != nil {
+			sess.Process.Close()
+		}
+		delete(csm.sessions, id)
+	}
+	csm.mu.Unlock()
+}
+
+// Count returns the number of active sessions.
+func (csm *ChatSessionManager) Count() int {
+	csm.mu.RLock()
+	defer csm.mu.RUnlock()
+	return len(csm.sessions)
+}
+
+func (csm *ChatSessionManager) cleanup() {
+	ticker := time.NewTicker(cleanupInterval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-csm.stopCh:
+			return
+		case <-ticker.C:
+			csm.cleanupIdle()
+		}
+	}
+}
+
+func (csm *ChatSessionManager) cleanupIdle() {
+	csm.mu.Lock()
+	var toRemove []string
+	for id, sess := range csm.sessions {
+		sess.mu.Lock()
+		idle := time.Since(sess.LastActive) > maxIdleTime
+		sess.mu.Unlock()
+		if idle {
+			toRemove = append(toRemove, id)
+		}
+	}
+	csm.mu.Unlock()
+
+	for _, id := range toRemove {
+		log.Printf("Cleaning up idle session: %s", id)
+		csm.Remove(id)
+	}
+}
diff --git a/sessions_test.go b/sessions_test.go
new file mode 100644
index 0000000..21433fe
--- /dev/null
+++ b/sessions_test.go
@@ -0,0 +1,153 @@
+package main
+
+import (
+	"testing"
+	"time"
+)
+
+func TestChatSession_AddMessage(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	cs.AddMessage(ChatMessage{Role: "user", Content: "hello"})
+	cs.AddMessage(ChatMessage{Role: "assistant", Content: "hi"})
+
+	buf := cs.GetBuffer()
+	if len(buf) != 2 {
+		t.Fatalf("buffer len = %d, want 2", len(buf))
+	}
+	if buf[0].Role != "user" {
+		t.Errorf("buf[0].Role = %q", buf[0].Role)
+	}
+	if buf[1].Content != "hi" {
+		t.Errorf("buf[1].Content = %q", buf[1].Content)
+	}
+}
+
+func TestChatSession_BufferCap(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	for i := 0; i < maxBufferSize+50; i++ {
+		cs.AddMessage(ChatMessage{Role: "user", Content: "msg"})
+	}
+
+	buf := cs.GetBuffer()
+	if len(buf) != maxBufferSize {
+		t.Errorf("buffer len = %d, want %d", len(buf), maxBufferSize)
+	}
+}
+
+func TestChatSession_GetBufferIsCopy(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+	cs.AddMessage(ChatMessage{Role: "user", Content: "hello"})
+
+	buf := cs.GetBuffer()
+	buf[0].Content = "modified"
+
+	original := cs.GetBuffer()
+	if original[0].Content != "hello" {
+		t.Error("GetBuffer should return a copy")
+	}
+}
+
+func TestChatSession_LastActiveUpdated(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		LastActive:  time.Now().Add(-1 * time.Hour),
+		subscribers: make(map[string]*Subscriber),
+	}
+	before := cs.LastActive
+	cs.AddMessage(ChatMessage{Role: "user", Content: "hello"})
+	if !cs.LastActive.After(before) {
+		t.Error("LastActive should be updated")
+	}
+}
+
+func TestChatSession_Subscribe(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	sub := cs.Subscribe("test-1")
+	if sub == nil {
+		t.Fatal("subscriber is nil")
+	}
+	if cs.SubscriberCount() != 1 {
+		t.Errorf("subscriber count = %d, want 1", cs.SubscriberCount())
+	}
+
+	// Message should be broadcast
+	go cs.AddMessage(ChatMessage{Role: "user", Content: "hello"})
+
+	select {
+	case msg := <-sub.Ch:
+		if msg != "hello" {
+			t.Errorf("got %q, want hello", msg)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("timeout waiting for broadcast")
+	}
+}
+
+func TestChatSession_Unsubscribe(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	cs.Subscribe("test-1")
+	cs.Unsubscribe("test-1")
+
+	if cs.SubscriberCount() != 0 {
+		t.Errorf("subscriber count = %d, want 0", cs.SubscriberCount())
+	}
+}
+
+func TestChatSession_MultipleSubscribers(t *testing.T) {
+	cs := &ChatSession{
+		Buffer:      make([]ChatMessage, 0),
+		subscribers: make(map[string]*Subscriber),
+	}
+
+	sub1 := cs.Subscribe("s1")
+	sub2 := cs.Subscribe("s2")
+
+	go cs.AddMessage(ChatMessage{Role: "user", Content: "broadcast"})
+
+	for _, sub := range []*Subscriber{sub1, sub2} {
+		select {
+		case msg := <-sub.Ch:
+			if msg != "broadcast" {
+				t.Errorf("got %q, want broadcast", msg)
+			}
+		case <-time.After(time.Second):
+			t.Fatal("timeout waiting for broadcast")
+		}
+	}
+}
+
+func TestChatSessionManager_Count(t *testing.T) {
+	csm := NewChatSessionManager()
+	defer csm.Stop()
+
+	if csm.Count() != 0 {
+		t.Errorf("initial count = %d, want 0", csm.Count())
+	}
+}
+
+func TestChatSessionManager_Remove(t *testing.T) {
+	csm := NewChatSessionManager()
+	defer csm.Stop()
+
+	// Remove nonexistent should not panic
+	csm.Remove("nonexistent")
+}
diff --git a/static/htmx.min.js b/static/htmx.min.js
new file mode 100644
index 0000000..59937d7
--- /dev/null
+++ b/static/htmx.min.js
@@ -0,0 +1 @@
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diff --git a/static/style.css b/static/style.css
new file mode 100644
index 0000000..85bdff0
--- /dev/null
+++ b/static/style.css
@@ -0,0 +1,465 @@
+:root {
+    --bg-primary: #1a1a2e;
+    --bg-secondary: #16213e;
+    --bg-tertiary: #0f3460;
+    --bg-input: #1e2a4a;
+    --text-primary: #e0e0e0;
+    --text-secondary: #a0a0b0;
+    --text-muted: #6c6c80;
+    --accent: #e94560;
+    --accent-hover: #ff6b81;
+    --border: #2a2a4a;
+    --success: #4caf50;
+    --warning: #ff9800;
+    --error: #f44336;
+    --code-bg: #0d1117;
+    --shadow: rgba(0, 0, 0, 0.3);
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+    background: var(--bg-primary);
+    color: var(--text-primary);
+    min-height: 100vh;
+}
+
+a {
+    color: var(--accent);
+    text-decoration: none;
+}
+
+a:hover {
+    color: var(--accent-hover);
+}
+
+/* Login */
+.login-container {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    min-height: 100vh;
+}
+
+.login-box {
+    background: var(--bg-secondary);
+    border: 1px solid var(--border);
+    border-radius: 12px;
+    padding: 2.5rem;
+    width: 100%;
+    max-width: 400px;
+    box-shadow: 0 8px 32px var(--shadow);
+}
+
+.login-box h1 {
+    text-align: center;
+    margin-bottom: 1.5rem;
+    font-size: 1.5rem;
+    color: var(--accent);
+}
+
+.form-group {
+    margin-bottom: 1rem;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 0.4rem;
+    color: var(--text-secondary);
+    font-size: 0.9rem;
+}
+
+.form-group input {
+    width: 100%;
+    padding: 0.7rem 1rem;
+    background: var(--bg-input);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    color: var(--text-primary);
+    font-size: 1rem;
+    outline: none;
+    transition: border-color 0.2s;
+}
+
+.form-group input:focus {
+    border-color: var(--accent);
+}
+
+.btn {
+    display: inline-block;
+    padding: 0.7rem 1.5rem;
+    background: var(--accent);
+    color: #fff;
+    border: none;
+    border-radius: 8px;
+    font-size: 1rem;
+    cursor: pointer;
+    transition: background 0.2s;
+    text-align: center;
+}
+
+.btn:hover {
+    background: var(--accent-hover);
+}
+
+.btn-full {
+    width: 100%;
+}
+
+.error-msg {
+    background: rgba(244, 67, 54, 0.15);
+    color: var(--error);
+    padding: 0.6rem 1rem;
+    border-radius: 8px;
+    margin-bottom: 1rem;
+    font-size: 0.9rem;
+    text-align: center;
+}
+
+/* Projects grid */
+.projects-container {
+    max-width: 1000px;
+    margin: 0 auto;
+    padding: 2rem;
+}
+
+.projects-container h1 {
+    margin-bottom: 1.5rem;
+    color: var(--accent);
+}
+
+.projects-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 1.5rem;
+}
+
+.projects-header .btn {
+    padding: 0.5rem 1rem;
+    font-size: 0.85rem;
+}
+
+.projects-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+    gap: 1rem;
+}
+
+.project-card {
+    background: var(--bg-secondary);
+    border: 1px solid var(--border);
+    border-radius: 12px;
+    padding: 1.5rem;
+    cursor: pointer;
+    transition: border-color 0.2s, transform 0.1s;
+    text-decoration: none;
+    color: var(--text-primary);
+    display: block;
+}
+
+.project-card:hover {
+    border-color: var(--accent);
+    transform: translateY(-2px);
+    color: var(--text-primary);
+}
+
+.project-card h3 {
+    margin-bottom: 0.4rem;
+}
+
+.project-card p {
+    color: var(--text-secondary);
+    font-size: 0.85rem;
+}
+
+/* Chat layout */
+.chat-container {
+    display: flex;
+    height: 100vh;
+}
+
+.sidebar {
+    width: 300px;
+    background: var(--bg-secondary);
+    border-right: 1px solid var(--border);
+    display: flex;
+    flex-direction: column;
+    flex-shrink: 0;
+}
+
+.sidebar-header {
+    padding: 1rem;
+    border-bottom: 1px solid var(--border);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.sidebar-header h3 {
+    font-size: 0.95rem;
+    color: var(--text-secondary);
+}
+
+.sidebar-content {
+    flex: 1;
+    overflow-y: auto;
+    padding: 0.5rem;
+}
+
+.file-item {
+    padding: 0.5rem 0.75rem;
+    border-radius: 6px;
+    cursor: pointer;
+    font-size: 0.85rem;
+    color: var(--text-secondary);
+    display: block;
+    text-decoration: none;
+    transition: background 0.15s;
+}
+
+.file-item:hover {
+    background: var(--bg-tertiary);
+    color: var(--text-primary);
+}
+
+.file-item.active {
+    background: var(--bg-tertiary);
+    color: var(--accent);
+}
+
+.chat-main {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    min-width: 0;
+}
+
+.chat-header {
+    padding: 0.75rem 1.5rem;
+    border-bottom: 1px solid var(--border);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    background: var(--bg-secondary);
+}
+
+.chat-header h2 {
+    font-size: 1.1rem;
+}
+
+.chat-header .status {
+    font-size: 0.8rem;
+    color: var(--text-muted);
+}
+
+.chat-header .status.connected {
+    color: var(--success);
+}
+
+.chat-messages {
+    flex: 1;
+    overflow-y: auto;
+    padding: 1rem 1.5rem;
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+}
+
+.message {
+    max-width: 85%;
+    padding: 0.8rem 1.2rem;
+    border-radius: 12px;
+    line-height: 1.5;
+    font-size: 0.95rem;
+    word-wrap: break-word;
+}
+
+.message-user {
+    align-self: flex-end;
+    background: var(--bg-tertiary);
+    border: 1px solid var(--border);
+}
+
+.message-assistant {
+    align-self: flex-start;
+    background: var(--bg-secondary);
+    border: 1px solid var(--border);
+}
+
+.message-assistant .content {
+    white-space: pre-wrap;
+}
+
+.message-system {
+    align-self: center;
+    background: transparent;
+    color: var(--text-muted);
+    font-size: 0.85rem;
+    font-style: italic;
+}
+
+.message-tool {
+    align-self: flex-start;
+    background: rgba(15, 52, 96, 0.5);
+    border: 1px solid var(--border);
+    font-size: 0.85rem;
+    color: var(--text-secondary);
+    max-width: 90%;
+}
+
+.message-tool .tool-name {
+    color: var(--warning);
+    font-weight: 600;
+    margin-bottom: 0.3rem;
+}
+
+.typing-indicator {
+    align-self: flex-start;
+    color: var(--text-muted);
+    font-style: italic;
+    font-size: 0.85rem;
+    padding: 0.5rem 0;
+}
+
+.typing-indicator .dots {
+    display: inline-block;
+    animation: blink 1.4s infinite;
+}
+
+@keyframes blink {
+    0%, 20% { opacity: 1; }
+    50% { opacity: 0.3; }
+    80%, 100% { opacity: 1; }
+}
+
+.chat-input-area {
+    padding: 1rem 1.5rem;
+    border-top: 1px solid var(--border);
+    background: var(--bg-secondary);
+}
+
+.chat-input-form {
+    display: flex;
+    gap: 0.75rem;
+}
+
+.chat-input {
+    flex: 1;
+    padding: 0.75rem 1rem;
+    background: var(--bg-input);
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    color: var(--text-primary);
+    font-size: 1rem;
+    outline: none;
+    resize: none;
+    font-family: inherit;
+    min-height: 44px;
+    max-height: 200px;
+}
+
+.chat-input:focus {
+    border-color: var(--accent);
+}
+
+.chat-input-form .btn {
+    align-self: flex-end;
+}
+
+/* Code blocks in messages */
+.message pre {
+    background: var(--code-bg);
+    border-radius: 6px;
+    padding: 0.8rem;
+    overflow-x: auto;
+    margin: 0.5rem 0;
+    font-size: 0.85rem;
+}
+
+.message code {
+    font-family: 'JetBrains Mono', 'Fira Code', monospace;
+    font-size: 0.9em;
+}
+
+.message p code {
+    background: var(--code-bg);
+    padding: 0.15rem 0.4rem;
+    border-radius: 4px;
+}
+
+/* File viewer overlay */
+.file-viewer {
+    position: fixed;
+    top: 0;
+    right: 0;
+    width: 50%;
+    height: 100vh;
+    background: var(--bg-secondary);
+    border-left: 1px solid var(--border);
+    z-index: 100;
+    display: flex;
+    flex-direction: column;
+    box-shadow: -4px 0 16px var(--shadow);
+}
+
+.file-viewer-header {
+    padding: 1rem;
+    border-bottom: 1px solid var(--border);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.file-viewer-content {
+    flex: 1;
+    overflow-y: auto;
+    padding: 1.5rem;
+    line-height: 1.6;
+}
+
+.file-viewer-content h1,
+.file-viewer-content h2,
+.file-viewer-content h3 {
+    margin: 1rem 0 0.5rem;
+    color: var(--accent);
+}
+
+.file-viewer-content pre {
+    background: var(--code-bg);
+    border-radius: 6px;
+    padding: 1rem;
+    overflow-x: auto;
+}
+
+.file-viewer-content code {
+    font-family: 'JetBrains Mono', 'Fira Code', monospace;
+}
+
+/* Scrollbar */
+::-webkit-scrollbar {
+    width: 8px;
+}
+
+::-webkit-scrollbar-track {
+    background: var(--bg-primary);
+}
+
+::-webkit-scrollbar-thumb {
+    background: var(--border);
+    border-radius: 4px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+    background: var(--text-muted);
+}
+
+/* Hidden */
+.hidden {
+    display: none !important;
+}
diff --git a/static/ws.js b/static/ws.js
new file mode 100644
index 0000000..4b09b20
--- /dev/null
+++ b/static/ws.js
@@ -0,0 +1,471 @@
+/*
+WebSockets Extension
+============================
+This extension adds support for WebSockets to htmx.  See /www/extensions/ws.md for usage instructions.
+*/
+
+(function() {
+  /** @type {import("../htmx").HtmxInternalApi} */
+  var api
+
+  htmx.defineExtension('ws', {
+
+    /**
+     * init is called once, when this extension is first registered.
+     * @param {import("../htmx").HtmxInternalApi} apiRef
+     */
+    init: function(apiRef) {
+      // Store reference to internal API
+      api = apiRef
+
+      // Default function for creating new EventSource objects
+      if (!htmx.createWebSocket) {
+        htmx.createWebSocket = createWebSocket
+      }
+
+      // Default setting for reconnect delay
+      if (!htmx.config.wsReconnectDelay) {
+        htmx.config.wsReconnectDelay = 'full-jitter'
+      }
+    },
+
+    /**
+     * onEvent handles all events passed to this extension.
+     *
+     * @param {string} name
+     * @param {Event} evt
+     */
+    onEvent: function(name, evt) {
+      var parent = evt.target || evt.detail.elt
+      switch (name) {
+        // Try to close the socket when elements are removed
+        case 'htmx:beforeCleanupElement':
+
+          var internalData = api.getInternalData(parent)
+
+          if (internalData.webSocket) {
+            internalData.webSocket.close()
+          }
+          return
+
+          // Try to create websockets when elements are processed
+        case 'htmx:beforeProcessNode':
+
+          forEach(queryAttributeOnThisOrChildren(parent, 'ws-connect'), function(child) {
+            ensureWebSocket(child)
+          })
+          forEach(queryAttributeOnThisOrChildren(parent, 'ws-send'), function(child) {
+            ensureWebSocketSend(child)
+          })
+      }
+    }
+  })
+
+  function splitOnWhitespace(trigger) {
+    return trigger.trim().split(/\s+/)
+  }
+
+  function getLegacyWebsocketURL(elt) {
+    var legacySSEValue = api.getAttributeValue(elt, 'hx-ws')
+    if (legacySSEValue) {
+      var values = splitOnWhitespace(legacySSEValue)
+      for (var i = 0; i < values.length; i++) {
+        var value = values[i].split(/:(.+)/)
+        if (value[0] === 'connect') {
+          return value[1]
+        }
+      }
+    }
+  }
+
+  /**
+   * ensureWebSocket creates a new WebSocket on the designated element, using
+   * the element's "ws-connect" attribute.
+   * @param {HTMLElement} socketElt
+   * @returns
+   */
+  function ensureWebSocket(socketElt) {
+    // If the element containing the WebSocket connection no longer exists, then
+    // do not connect/reconnect the WebSocket.
+    if (!api.bodyContains(socketElt)) {
+      return
+    }
+
+    // Get the source straight from the element's value
+    var wssSource = api.getAttributeValue(socketElt, 'ws-connect')
+
+    if (wssSource == null || wssSource === '') {
+      var legacySource = getLegacyWebsocketURL(socketElt)
+      if (legacySource == null) {
+        return
+      } else {
+        wssSource = legacySource
+      }
+    }
+
+    // Guarantee that the wssSource value is a fully qualified URL
+    if (wssSource.indexOf('/') === 0) {
+      var base_part = location.hostname + (location.port ? ':' + location.port : '')
+      if (location.protocol === 'https:') {
+        wssSource = 'wss://' + base_part + wssSource
+      } else if (location.protocol === 'http:') {
+        wssSource = 'ws://' + base_part + wssSource
+      }
+    }
+
+    var socketWrapper = createWebsocketWrapper(socketElt, function() {
+      return htmx.createWebSocket(wssSource)
+    })
+
+    socketWrapper.addEventListener('message', function(event) {
+      if (maybeCloseWebSocketSource(socketElt)) {
+        return
+      }
+
+      var response = event.data
+      if (!api.triggerEvent(socketElt, 'htmx:wsBeforeMessage', {
+        message: response,
+        socketWrapper: socketWrapper.publicInterface
+      })) {
+        return
+      }
+
+      api.withExtensions(socketElt, function(extension) {
+        response = extension.transformResponse(response, null, socketElt)
+      })
+
+      var settleInfo = api.makeSettleInfo(socketElt)
+      var fragment = api.makeFragment(response)
+
+      if (fragment.children.length) {
+        var children = Array.from(fragment.children)
+        for (var i = 0; i < children.length; i++) {
+          api.oobSwap(api.getAttributeValue(children[i], 'hx-swap-oob') || 'true', children[i], settleInfo)
+        }
+      }
+
+      api.settleImmediately(settleInfo.tasks)
+      api.triggerEvent(socketElt, 'htmx:wsAfterMessage', { message: response, socketWrapper: socketWrapper.publicInterface })
+    })
+
+    // Put the WebSocket into the HTML Element's custom data.
+    api.getInternalData(socketElt).webSocket = socketWrapper
+  }
+
+  /**
+   * @typedef {Object} WebSocketWrapper
+   * @property {WebSocket} socket
+   * @property {Array<{message: string, sendElt: Element}>} messageQueue
+   * @property {number} retryCount
+   * @property {(message: string, sendElt: Element) => void} sendImmediately sendImmediately sends message regardless of websocket connection state
+   * @property {(message: string, sendElt: Element) => void} send
+   * @property {(event: string, handler: Function) => void} addEventListener
+   * @property {() => void} handleQueuedMessages
+   * @property {() => void} init
+   * @property {() => void} close
+   */
+  /**
+   *
+   * @param socketElt
+   * @param socketFunc
+   * @returns {WebSocketWrapper}
+   */
+  function createWebsocketWrapper(socketElt, socketFunc) {
+    var wrapper = {
+      socket: null,
+      messageQueue: [],
+      retryCount: 0,
+
+      /** @type {Object<string, Function[]>} */
+      events: {},
+
+      addEventListener: function(event, handler) {
+        if (this.socket) {
+          this.socket.addEventListener(event, handler)
+        }
+
+        if (!this.events[event]) {
+          this.events[event] = []
+        }
+
+        this.events[event].push(handler)
+      },
+
+      sendImmediately: function(message, sendElt) {
+        if (!this.socket) {
+          api.triggerErrorEvent()
+        }
+        if (!sendElt || api.triggerEvent(sendElt, 'htmx:wsBeforeSend', {
+          message,
+          socketWrapper: this.publicInterface
+        })) {
+          this.socket.send(message)
+          sendElt && api.triggerEvent(sendElt, 'htmx:wsAfterSend', {
+            message,
+            socketWrapper: this.publicInterface
+          })
+        }
+      },
+
+      send: function(message, sendElt) {
+        if (this.socket.readyState !== this.socket.OPEN) {
+          this.messageQueue.push({ message, sendElt })
+        } else {
+          this.sendImmediately(message, sendElt)
+        }
+      },
+
+      handleQueuedMessages: function() {
+        while (this.messageQueue.length > 0) {
+          var queuedItem = this.messageQueue[0]
+          if (this.socket.readyState === this.socket.OPEN) {
+            this.sendImmediately(queuedItem.message, queuedItem.sendElt)
+            this.messageQueue.shift()
+          } else {
+            break
+          }
+        }
+      },
+
+      init: function() {
+        if (this.socket && this.socket.readyState === this.socket.OPEN) {
+          // Close discarded socket
+          this.socket.close()
+        }
+
+        // Create a new WebSocket and event handlers
+        /** @type {WebSocket} */
+        var socket = socketFunc()
+
+        // The event.type detail is added for interface conformance with the
+        // other two lifecycle events (open and close) so a single handler method
+        // can handle them polymorphically, if required.
+        api.triggerEvent(socketElt, 'htmx:wsConnecting', { event: { type: 'connecting' } })
+
+        this.socket = socket
+
+        socket.onopen = function(e) {
+          wrapper.retryCount = 0
+          api.triggerEvent(socketElt, 'htmx:wsOpen', { event: e, socketWrapper: wrapper.publicInterface })
+          wrapper.handleQueuedMessages()
+        }
+
+        socket.onclose = function(e) {
+          // If socket should not be connected, stop further attempts to establish connection
+          // If Abnormal Closure/Service Restart/Try Again Later, then set a timer to reconnect after a pause.
+          if (!maybeCloseWebSocketSource(socketElt) && [1006, 1012, 1013].indexOf(e.code) >= 0) {
+            var delay = getWebSocketReconnectDelay(wrapper.retryCount)
+            setTimeout(function() {
+              wrapper.retryCount += 1
+              wrapper.init()
+            }, delay)
+          }
+
+          // Notify client code that connection has been closed. Client code can inspect `event` field
+          // to determine whether closure has been valid or abnormal
+          api.triggerEvent(socketElt, 'htmx:wsClose', { event: e, socketWrapper: wrapper.publicInterface })
+        }
+
+        socket.onerror = function(e) {
+          api.triggerErrorEvent(socketElt, 'htmx:wsError', { error: e, socketWrapper: wrapper })
+          maybeCloseWebSocketSource(socketElt)
+        }
+
+        var events = this.events
+        Object.keys(events).forEach(function(k) {
+          events[k].forEach(function(e) {
+            socket.addEventListener(k, e)
+          })
+        })
+      },
+
+      close: function() {
+        this.socket.close()
+      }
+    }
+
+    wrapper.init()
+
+    wrapper.publicInterface = {
+      send: wrapper.send.bind(wrapper),
+      sendImmediately: wrapper.sendImmediately.bind(wrapper),
+      queue: wrapper.messageQueue
+    }
+
+    return wrapper
+  }
+
+  /**
+   * ensureWebSocketSend attaches trigger handles to elements with
+   * "ws-send" attribute
+   * @param {HTMLElement} elt
+   */
+  function ensureWebSocketSend(elt) {
+    var legacyAttribute = api.getAttributeValue(elt, 'hx-ws')
+    if (legacyAttribute && legacyAttribute !== 'send') {
+      return
+    }
+
+    var webSocketParent = api.getClosestMatch(elt, hasWebSocket)
+    processWebSocketSend(webSocketParent, elt)
+  }
+
+  /**
+   * hasWebSocket function checks if a node has webSocket instance attached
+   * @param {HTMLElement} node
+   * @returns {boolean}
+   */
+  function hasWebSocket(node) {
+    return api.getInternalData(node).webSocket != null
+  }
+
+  /**
+   * processWebSocketSend adds event listeners to the <form> element so that
+   * messages can be sent to the WebSocket server when the form is submitted.
+   * @param {HTMLElement} socketElt
+   * @param {HTMLElement} sendElt
+   */
+  function processWebSocketSend(socketElt, sendElt) {
+    var nodeData = api.getInternalData(sendElt)
+    var triggerSpecs = api.getTriggerSpecs(sendElt)
+    triggerSpecs.forEach(function(ts) {
+      api.addTriggerHandler(sendElt, ts, nodeData, function(elt, evt) {
+        if (maybeCloseWebSocketSource(socketElt)) {
+          return
+        }
+
+        /** @type {WebSocketWrapper} */
+        var socketWrapper = api.getInternalData(socketElt).webSocket
+        var headers = api.getHeaders(sendElt, api.getTarget(sendElt))
+        var results = api.getInputValues(sendElt, 'post')
+        var errors = results.errors
+        var rawParameters = Object.assign({}, results.values)
+        var expressionVars = api.getExpressionVars(sendElt)
+        var allParameters = api.mergeObjects(rawParameters, expressionVars)
+        var filteredParameters = api.filterValues(allParameters, sendElt)
+
+        var sendConfig = {
+          parameters: filteredParameters,
+          unfilteredParameters: allParameters,
+          headers,
+          errors,
+
+          triggeringEvent: evt,
+          messageBody: undefined,
+          socketWrapper: socketWrapper.publicInterface
+        }
+
+        if (!api.triggerEvent(elt, 'htmx:wsConfigSend', sendConfig)) {
+          return
+        }
+
+        if (errors && errors.length > 0) {
+          api.triggerEvent(elt, 'htmx:validation:halted', errors)
+          return
+        }
+
+        var body = sendConfig.messageBody
+        if (body === undefined) {
+          var toSend = Object.assign({}, sendConfig.parameters)
+          if (sendConfig.headers) { toSend.HEADERS = headers }
+          body = JSON.stringify(toSend)
+        }
+
+        socketWrapper.send(body, elt)
+
+        if (evt && api.shouldCancel(evt, elt)) {
+          evt.preventDefault()
+        }
+      })
+    })
+  }
+
+  /**
+   * getWebSocketReconnectDelay is the default easing function for WebSocket reconnects.
+   * @param {number} retryCount // The number of retries that have already taken place
+   * @returns {number}
+   */
+  function getWebSocketReconnectDelay(retryCount) {
+    /** @type {"full-jitter" | ((retryCount:number) => number)} */
+    var delay = htmx.config.wsReconnectDelay
+    if (typeof delay === 'function') {
+      return delay(retryCount)
+    }
+    if (delay === 'full-jitter') {
+      var exp = Math.min(retryCount, 6)
+      var maxDelay = 1000 * Math.pow(2, exp)
+      return maxDelay * Math.random()
+    }
+
+    logError('htmx.config.wsReconnectDelay must either be a function or the string "full-jitter"')
+  }
+
+  /**
+   * maybeCloseWebSocketSource checks to the if the element that created the WebSocket
+   * still exists in the DOM.  If NOT, then the WebSocket is closed and this function
+   * returns TRUE.  If the element DOES EXIST, then no action is taken, and this function
+   * returns FALSE.
+   *
+   * @param {*} elt
+   * @returns
+   */
+  function maybeCloseWebSocketSource(elt) {
+    if (!api.bodyContains(elt)) {
+      var internalData = api.getInternalData(elt)
+      if (internalData.webSocket) {
+        internalData.webSocket.close()
+        return true
+      }
+      return false
+    }
+    return false
+  }
+
+  /**
+   * createWebSocket is the default method for creating new WebSocket objects.
+   * it is hoisted into htmx.createWebSocket to be overridden by the user, if needed.
+   *
+   * @param {string} url
+   * @returns WebSocket
+   */
+  function createWebSocket(url) {
+    var sock = new WebSocket(url, [])
+    sock.binaryType = htmx.config.wsBinaryType
+    return sock
+  }
+
+  /**
+   * queryAttributeOnThisOrChildren returns all nodes that contain the requested attributeName, INCLUDING THE PROVIDED ROOT ELEMENT.
+   *
+   * @param {HTMLElement} elt
+   * @param {string} attributeName
+   */
+  function queryAttributeOnThisOrChildren(elt, attributeName) {
+    var result = []
+
+    // If the parent element also contains the requested attribute, then add it to the results too.
+    if (api.hasAttribute(elt, attributeName) || api.hasAttribute(elt, 'hx-ws')) {
+      result.push(elt)
+    }
+
+    // Search all child nodes that match the requested attribute
+    elt.querySelectorAll('[' + attributeName + '], [data-' + attributeName + '], [data-hx-ws], [hx-ws]').forEach(function(node) {
+      result.push(node)
+    })
+
+    return result
+  }
+
+  /**
+   * @template T
+   * @param {T[]} arr
+   * @param {(T) => void} func
+   */
+  function forEach(arr, func) {
+    if (arr) {
+      for (var i = 0; i < arr.length; i++) {
+        func(arr[i])
+      }
+    }
+  }
+})()
diff --git a/templates.go b/templates.go
new file mode 100644
index 0000000..41e97c5
--- /dev/null
+++ b/templates.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"html/template"
+	"io"
+	"os"
+	"path/filepath"
+	"sync"
+)
+
+type TemplateRenderer struct {
+	dir       string
+	templates map[string]*template.Template
+	mu        sync.RWMutex
+}
+
+func NewTemplateRenderer(dir string) (*TemplateRenderer, error) {
+	tr := &TemplateRenderer{
+		dir:       dir,
+		templates: make(map[string]*template.Template),
+	}
+	if err := tr.loadAll(); err != nil {
+		return nil, err
+	}
+	return tr, nil
+}
+
+func (tr *TemplateRenderer) loadAll() error {
+	entries, err := os.ReadDir(tr.dir)
+	if err != nil {
+		return err
+	}
+	for _, e := range entries {
+		if e.IsDir() || filepath.Ext(e.Name()) != ".html" {
+			continue
+		}
+		path := filepath.Join(tr.dir, e.Name())
+		tmpl, err := template.ParseFiles(path)
+		if err != nil {
+			return err
+		}
+		tr.templates[e.Name()] = tmpl
+	}
+	return nil
+}
+
+func (tr *TemplateRenderer) Render(w io.Writer, name string, data any) error {
+	tr.mu.RLock()
+	tmpl, ok := tr.templates[name]
+	tr.mu.RUnlock()
+	if !ok {
+		return os.ErrNotExist
+	}
+	return tmpl.Execute(w, data)
+}
diff --git a/templates/chat.html b/templates/chat.html
new file mode 100644
index 0000000..caf8d48
--- /dev/null
+++ b/templates/chat.html
@@ -0,0 +1,112 @@
+<!DOCTYPE html>
+<html lang="sr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Claude Web Chat — {{.Project}}</title>
+    <link rel="stylesheet" href="/static/style.css">
+    <script src="/static/htmx.min.js"></script>
+    <script src="/static/ws.js"></script>
+</head>
+<body>
+    <div class="chat-container">
+        <!-- Sidebar -->
+        <div class="sidebar">
+            <div class="sidebar-header">
+                <h3>Fajlovi</h3>
+                <a href="/projects" style="font-size:0.85rem;">← Projekti</a>
+            </div>
+            <div class="sidebar-content" id="file-list">
+                {{range .Files}}
+                <a class="file-item" href="#" onclick="loadFile('{{.RelPath}}'); return false;">{{.Name}}</a>
+                {{end}}
+                {{if not .Files}}
+                <div style="padding: 1rem; color: var(--text-muted); font-size: 0.85rem;">
+                    Nema .md fajlova
+                </div>
+                {{end}}
+            </div>
+        </div>
+
+        <!-- Chat main area -->
+        <div class="chat-main">
+            <div class="chat-header">
+                <h2>{{.Project}}</h2>
+                <span id="ws-status" class="status">Povezivanje...</span>
+            </div>
+
+            <div class="chat-messages" id="chat-messages">
+                <!-- Messages will be appended here via OOB swap -->
+            </div>
+
+            <div id="typing-indicator"></div>
+
+            <div class="chat-input-area" hx-ext="ws" ws-connect="/ws?project={{.Project}}&project_dir={{.ProjectDir}}">
+                <form class="chat-input-form" ws-send>
+                    <textarea id="message-input" name="message" class="chat-input" placeholder="Pošalji poruku..." rows="1"></textarea>
+                    <button type="submit" class="btn">Pošalji</button>
+                </form>
+            </div>
+        </div>
+
+        <!-- File viewer overlay (hidden by default) -->
+        <div id="file-viewer" class="file-viewer hidden">
+            <div class="file-viewer-header">
+                <h3 id="file-viewer-title"></h3>
+                <button class="btn" onclick="closeFileViewer()">Zatvori</button>
+            </div>
+            <div class="file-viewer-content" id="file-viewer-content">
+            </div>
+        </div>
+    </div>
+
+    <script>
+        // Auto-resize textarea
+        const textarea = document.getElementById('message-input');
+        if (textarea) {
+            textarea.addEventListener('input', function() {
+                this.style.height = 'auto';
+                this.style.height = Math.min(this.scrollHeight, 200) + 'px';
+            });
+
+            // Submit on Enter (Shift+Enter for newline)
+            textarea.addEventListener('keydown', function(e) {
+                if (e.key === 'Enter' && !e.shiftKey) {
+                    e.preventDefault();
+                    this.closest('form').dispatchEvent(new Event('submit', { bubbles: true }));
+                }
+            });
+        }
+
+        // Auto-scroll chat
+        const chatMessages = document.getElementById('chat-messages');
+        const observer = new MutationObserver(function() {
+            chatMessages.scrollTop = chatMessages.scrollHeight;
+        });
+        observer.observe(chatMessages, { childList: true, subtree: true });
+
+        // File viewer
+        function loadFile(relPath) {
+            fetch('/api/file?project={{.Project}}&path=' + encodeURIComponent(relPath))
+                .then(r => r.json())
+                .then(data => {
+                    document.getElementById('file-viewer-title').textContent = data.name;
+                    document.getElementById('file-viewer-content').innerHTML = data.html;
+                    document.getElementById('file-viewer').classList.remove('hidden');
+                })
+                .catch(err => console.error('Error loading file:', err));
+        }
+
+        function closeFileViewer() {
+            document.getElementById('file-viewer').classList.add('hidden');
+        }
+
+        // Close file viewer with Escape
+        document.addEventListener('keydown', function(e) {
+            if (e.key === 'Escape') {
+                closeFileViewer();
+            }
+        });
+    </script>
+</body>
+</html>
diff --git a/templates/login.html b/templates/login.html
new file mode 100644
index 0000000..74227a3
--- /dev/null
+++ b/templates/login.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html lang="sr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Claude Web Chat — Login</title>
+    <link rel="stylesheet" href="/static/style.css">
+</head>
+<body>
+    <div class="login-container">
+        <div class="login-box">
+            <h1>Claude Web Chat</h1>
+            {{if .Error}}
+            <div class="error-msg">{{.Error}}</div>
+            {{end}}
+            <form method="POST" action="/login">
+                <div class="form-group">
+                    <label for="username">Korisnik</label>
+                    <input type="text" id="username" name="username" autocomplete="username" required autofocus>
+                </div>
+                <div class="form-group">
+                    <label for="password">Lozinka</label>
+                    <input type="password" id="password" name="password" autocomplete="current-password" required>
+                </div>
+                <button type="submit" class="btn btn-full">Prijavi se</button>
+            </form>
+        </div>
+    </div>
+</body>
+</html>
diff --git a/templates/projects.html b/templates/projects.html
new file mode 100644
index 0000000..4a5b58d
--- /dev/null
+++ b/templates/projects.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html lang="sr">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Claude Web Chat — Projekti</title>
+    <link rel="stylesheet" href="/static/style.css">
+</head>
+<body>
+    <div class="projects-container">
+        <div class="projects-header">
+            <h1>Projekti</h1>
+            <a href="/logout" class="btn">Odjavi se</a>
+        </div>
+        {{if .Projects}}
+        <div class="projects-grid">
+            {{range .Projects}}
+            <a href="/chat/{{.Name}}" class="project-card">
+                <h3>{{.Name}}</h3>
+                {{if .Description}}
+                <p>{{.Description}}</p>
+                {{else}}
+                <p>Bez opisa</p>
+                {{end}}
+            </a>
+            {{end}}
+        </div>
+        {{else}}
+        <p style="color: var(--text-secondary);">Nema projekata u {{.ProjectsPath}}</p>
+        {{end}}
+    </div>
+</body>
+</html>
diff --git a/templates_test.go b/templates_test.go
new file mode 100644
index 0000000..0520a23
--- /dev/null
+++ b/templates_test.go
@@ -0,0 +1,63 @@
+package main
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestTemplateRenderer(t *testing.T) {
+	dir := t.TempDir()
+
+	os.WriteFile(filepath.Join(dir, "test.html"), []byte(`<h1>{{.Title}}</h1>`), 0644)
+	os.WriteFile(filepath.Join(dir, "plain.html"), []byte(`<p>Hello</p>`), 0644)
+
+	tr, err := NewTemplateRenderer(dir)
+	if err != nil {
+		t.Fatalf("NewTemplateRenderer: %v", err)
+	}
+
+	t.Run("render with data", func(t *testing.T) {
+		var buf bytes.Buffer
+		err := tr.Render(&buf, "test.html", map[string]string{"Title": "World"})
+		if err != nil {
+			t.Fatalf("Render: %v", err)
+		}
+		if buf.String() != "<h1>World</h1>" {
+			t.Errorf("got %q", buf.String())
+		}
+	})
+
+	t.Run("render plain", func(t *testing.T) {
+		var buf bytes.Buffer
+		err := tr.Render(&buf, "plain.html", nil)
+		if err != nil {
+			t.Fatalf("Render: %v", err)
+		}
+		if buf.String() != "<p>Hello</p>" {
+			t.Errorf("got %q", buf.String())
+		}
+	})
+
+	t.Run("template not found", func(t *testing.T) {
+		var buf bytes.Buffer
+		err := tr.Render(&buf, "missing.html", nil)
+		if err == nil {
+			t.Fatal("expected error for missing template")
+		}
+	})
+
+	t.Run("empty dir", func(t *testing.T) {
+		emptyDir := t.TempDir()
+		tr2, err := NewTemplateRenderer(emptyDir)
+		if err != nil {
+			t.Fatalf("NewTemplateRenderer: %v", err)
+		}
+		var buf bytes.Buffer
+		err = tr2.Render(&buf, "anything.html", nil)
+		if err == nil {
+			t.Fatal("expected error")
+		}
+	})
+}
diff --git a/ws.go b/ws.go
new file mode 100644
index 0000000..6b24519
--- /dev/null
+++ b/ws.go
@@ -0,0 +1,248 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+	"github.com/yuin/goldmark"
+)
+
+var upgrader = websocket.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 4096,
+	CheckOrigin:     func(r *http.Request) bool { return true },
+}
+
+type wsMessage struct {
+	Message string `json:"message"`
+}
+
+// WSHandler handles WebSocket connections for chat.
+type WSHandler struct {
+	sessionMgr *ChatSessionManager
+	sessionsMu sync.Mutex
+}
+
+func NewWSHandler(sessionMgr *ChatSessionManager) *WSHandler {
+	return &WSHandler{
+		sessionMgr: sessionMgr,
+	}
+}
+
+func (wh *WSHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	project := r.URL.Query().Get("project")
+	projectDir := r.URL.Query().Get("project_dir")
+	if project == "" || projectDir == "" {
+		http.Error(w, "missing project params", http.StatusBadRequest)
+		return
+	}
+
+	conn, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		log.Printf("WebSocket upgrade error: %v", err)
+		return
+	}
+	defer conn.Close()
+
+	sessionID := fmt.Sprintf("%s-%s", project, r.RemoteAddr)
+	subID := fmt.Sprintf("ws-%d", time.Now().UnixNano())
+
+	sess, isNew, err := wh.sessionMgr.GetOrCreate(sessionID, projectDir)
+	if err != nil {
+		log.Printf("Session create error: %v", err)
+		writeWSText(conn, FragmentSystemMessage(fmt.Sprintf("Greška pri pokretanju Claude-a: %v", err)))
+		return
+	}
+
+	// Send status
+	writeWSText(conn, FragmentStatus(true))
+
+	if isNew {
+		writeWSText(conn, FragmentSystemMessage("Claude sesija pokrenuta. Možeš da pišeš."))
+	} else {
+		// Replay buffer
+		buffer := sess.GetBuffer()
+		for _, msg := range buffer {
+			writeWSText(conn, msg.Content)
+		}
+		writeWSText(conn, FragmentSystemMessage("Ponovo povezan. Istorija učitana."))
+	}
+
+	// Subscribe to session broadcasts
+	sub := sess.Subscribe(subID)
+	defer sess.Unsubscribe(subID)
+
+	// Start event listener if new session
+	if isNew {
+		go wh.listenEvents(sess)
+	}
+
+	// Write pump: forward broadcast messages to this WebSocket
+	wsDone := make(chan struct{})
+	go func() {
+		defer close(wsDone)
+		for fragment := range sub.Ch {
+			if err := conn.WriteMessage(websocket.TextMessage, []byte(fragment)); err != nil {
+				return
+			}
+		}
+	}()
+
+	// Read pump: messages from browser
+	for {
+		_, raw, err := conn.ReadMessage()
+		if err != nil {
+			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway, websocket.CloseNormalClosure) {
+				log.Printf("WebSocket read error: %v", err)
+			}
+			break
+		}
+
+		var msg wsMessage
+		if err := json.Unmarshal(raw, &msg); err != nil {
+			log.Printf("Invalid WS message: %v", err)
+			continue
+		}
+
+		text := strings.TrimSpace(msg.Message)
+		if text == "" {
+			continue
+		}
+
+		// Add user message to buffer (broadcasts to all subscribers including us)
+		userFragment := FragmentUserMessage(text)
+		sess.AddMessage(ChatMessage{
+			Role:      "user",
+			Content:   userFragment,
+			Timestamp: time.Now(),
+		})
+
+		// Clear input and show typing — send directly to this connection only
+		writeWSText(conn, FragmentCombine(FragmentClearInput(), FragmentTypingIndicator(true)))
+
+		// Send to claude CLI
+		if err := sess.Process.Send(text); err != nil {
+			log.Printf("Send to CLI error: %v", err)
+			writeWSText(conn, FragmentSystemMessage("Greška pri slanju poruke"))
+		}
+	}
+
+	// Don't close session — it stays alive for reconnect
+}
+
+// listenEvents reads events from the CLI process and broadcasts via AddMessage.
+func (wh *WSHandler) listenEvents(sess *ChatSession) {
+	var currentMsgID string
+	var currentText strings.Builder
+	msgCounter := 0
+
+	for {
+		select {
+		case event, ok := <-sess.Process.Events:
+			if !ok {
+				sess.AddMessage(ChatMessage{
+					Role:      "system",
+					Content:   FragmentSystemMessage("Claude sesija završena."),
+					Timestamp: time.Now(),
+				})
+				return
+			}
+
+			switch event.Type {
+			case "assistant":
+				if event.Message != nil {
+					for _, c := range event.Message.Content {
+						if c.Type == "tool_use" {
+							inputStr := ""
+							if c.Input != nil {
+								if b, err := json.Marshal(c.Input); err == nil {
+									inputStr = string(b)
+								}
+							}
+							fragment := FragmentToolCall(c.Name, inputStr)
+							sess.AddMessage(ChatMessage{
+								Role:      "tool",
+								Content:   fragment,
+								Timestamp: time.Now(),
+							})
+						}
+					}
+				}
+
+			case "content_block_start":
+				msgCounter++
+				currentMsgID = fmt.Sprintf("msg-%d-%d", time.Now().UnixMilli(), msgCounter)
+				currentText.Reset()
+				fragment := FragmentAssistantStart(currentMsgID)
+				sess.AddMessage(ChatMessage{
+					Role:      "assistant",
+					Content:   fragment,
+					Timestamp: time.Now(),
+				})
+
+			case "content_block_delta":
+				if event.Delta != nil && event.Delta.Text != "" {
+					currentText.WriteString(event.Delta.Text)
+					fragment := FragmentAssistantChunk(currentMsgID, event.Delta.Text)
+					sess.AddMessage(ChatMessage{
+						Role:      "assistant",
+						Content:   fragment,
+						Timestamp: time.Now(),
+					})
+				}
+
+			case "content_block_stop":
+				if currentText.Len() > 0 && currentMsgID != "" {
+					rendered := renderMarkdown(currentText.String())
+					fragment := FragmentAssistantComplete(currentMsgID, rendered)
+					sess.AddMessage(ChatMessage{
+						Role:      "assistant",
+						Content:   fragment,
+						Timestamp: time.Now(),
+					})
+				}
+
+			case "result":
+				fragment := FragmentTypingIndicator(false)
+				sess.AddMessage(ChatMessage{
+					Role:      "system",
+					Content:   fragment,
+					Timestamp: time.Now(),
+				})
+				if event.Result != nil && event.Result.CostUSD > 0 {
+					costMsg := FragmentSystemMessage(fmt.Sprintf("Gotovo (%.4f USD)", event.Result.CostUSD))
+					sess.AddMessage(ChatMessage{
+						Role:      "system",
+						Content:   costMsg,
+						Timestamp: time.Now(),
+					})
+				}
+			}
+
+		case err, ok := <-sess.Process.Errors:
+			if !ok {
+				return
+			}
+			log.Printf("CLI error [%s]: %v", sess.ID, err)
+		}
+	}
+}
+
+func renderMarkdown(text string) string {
+	var buf bytes.Buffer
+	if err := goldmark.Convert([]byte(text), &buf); err != nil {
+		return text
+	}
+	return buf.String()
+}
+
+func writeWSText(conn *websocket.Conn, text string) {
+	conn.WriteMessage(websocket.TextMessage, []byte(text))
+}
diff --git a/ws_test.go b/ws_test.go
new file mode 100644
index 0000000..a6d64c7
--- /dev/null
+++ b/ws_test.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestRenderMarkdown(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		contains string
+	}{
+		{"plain text", "Hello world", "<p>Hello world</p>"},
+		{"bold", "**bold**", "<strong>bold</strong>"},
+		{"code block", "```\ncode\n```", "<code>code"},
+		{"inline code", "`inline`", "<code>inline</code>"},
+		{"heading", "# Title", "<h1>Title</h1>"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := renderMarkdown(tt.input)
+			if !strings.Contains(result, tt.contains) {
+				t.Errorf("renderMarkdown(%q) = %q, want to contain %q", tt.input, result, tt.contains)
+			}
+		})
+	}
+}