.gitignore

@@ -0,0 +1,4 @@
+__pycache__/
+.venv/
+*.db
+.pytest_cache/

README.md

@@ -0,0 +1,102 @@
+# Počitadlo v kostkách
+
+Doprovod k fyzickým kostkám: **telefon zapisuje skóre, notebook ukazuje
+zápisník** a hry se pamatují mezi večery.
+
+Hráči se napříč hrami poznávají podle jména — Adam ze středečního večera je
+ten samý Adam jako z minulého měsíce. Žádné účty, žádná hesla.
+
+## Spuštění
+
+```bash
+uv run web.py
+```
+
+To je celé. Závislosti si skript nese v hlavičce (PEP 723) a `uv` je obstará
+sám — není co instalovat ani aktivovat.
+
+Server vypíše všechny adresy, na kterých je dostupný:
+
+```
+Počitadlo je dostupné na:
+ → http://10.186.234.182:8000     místní síť
+   http://100.91.0.24:8000        přes Tailscale
+   http://172.17.0.1:8000         virtuální síť
+```
+
+Na notebooku otevři `/board`, naskenuj QR kód telefonem a hraj. Tabule
+zobrazuje i zbylé adresy — když jedna nefunguje, zkus další.
+
+| Proměnná | K čemu je | Výchozí |
+|---|---|---|
+| `DICE_DB` | soubor s databází | `dice.db` |
+| `DICE_PORT` | port | `8000` |
+| `DICE_HOST` | pevná adresa; vypne hledání | hledá se za běhu |
+
+Počítá se s domácí sítí — appka nemá přihlašování a kdokoli na stejné WiFi
+může zapisovat.
+
+## Když se telefon nepřipojí
+
+Adresy se hledají při každém načtení tabule, takže přechod z domácí WiFi na
+hotspot a zpátky si tabule pohlídá sama a načte se znovu.
+
+Zbývají tři důvody, proč se telefon nedostane na notebook:
+
+- **Telefon je na mobilních datech**, notebook na WiFi. Různé sítě, nepotkají
+  se. Připoj telefon na stejnou WiFi, nebo notebook na hotspot telefonu —
+  to funguje taky.
+- **Zapnutý hotspot na telefonu shodil jeho WiFi.** Většina Androidů to dělá.
+  Pak je řešením připojit na ten hotspot i notebook.
+- **VPN nebo Tailscale exit node na telefonu** posílá veškerý provoz mimo
+  místní síť. V Tailscale to řeší přepínač „Allow local network access";
+  případně použij tailnet adresu notebooku, ta funguje odkudkoli.
+
+## Pravidla
+
+Skóre se zadává ručně po tazích, hází se doopravdy. Tři nulové tahy za sebou
+vynulují hráči skóre; indikátor `x` / `xx` ukazuje, jak blízko k tomu je.
+Vítěz se vyhlašuje až po dokončeném kole, aby měli všichni stejný počet tahů —
+při remíze na prvním místě se hraje dál.
+
+## Co kde je
+
+| Soubor | Role |
+|---|---|
+| `core.py` | pravidla hry, žádný vstup ani výstup |
+| `net.py` | hledání adres, na kterých je počitadlo dostupné |
+| `storage.py` | SQLite: hráči, hry, tahy |
+| `stats.py` | síň slávy a kariérní statistiky |
+| `web.py` | Flask aplikace |
+| `dice.py` | totéž v terminálu, bez ukládání |
+
+Terminálová verze zůstává funkční jako záloha:
+
+```bash
+uv run dice.py
+```
+
+## Bez uv
+
+Když `uv` po ruce není, jde to postaru:
+
+```bash
+python -m venv .venv
+.venv/bin/pip install -r requirements.txt
+.venv/bin/python web.py
+```
+
+Na Fedoře stačí i systémové balíčky, pak se nemusí řešit vůbec nic:
+
+```bash
+sudo dnf install python3-flask python3-qrcode python3-tabulate
+python3 web.py
+```
+
+## Testy
+
+```bash
+uv run --with-requirements requirements.txt --no-project pytest
+```
+
+Nebo z připraveného prostředí prostě `pytest`.

core.py

@@ -0,0 +1,163 @@
+"""Pravidla hry v kostky.
+
+Modul záměrně nic nevypisuje, na nic se neptá a nic neukládá — drží jen stav
+hry a pravidla nad ním. Díky tomu ho může sdílet CLI i webová aplikace a dá se
+testovat bez simulování vstupu.
+"""
+
+from collections import Counter
+from dataclasses import dataclass, field
+from datetime import datetime
+
+FINAL_SCORE: int = 10000
+
+# Kolik nulových tahů po sobě hráči vynuluje skóre.
+ZEROS_TO_RESET: int = 3
+
+
+@dataclass
+class Turn:
+    """Jeden zápis skóre.
+
+    Vynulování po třech nulách se ukládá jako hodnota 0 s příznakem `reset`,
+    ne jako záporný tah — do historie tak nepadají čísla, která nikdo nehodil,
+    a statistiky nad tahy zůstávají pravdivé.
+    """
+
+    player: str
+    round: int
+    value: int
+    reset: bool = False
+    at: datetime = field(default_factory=datetime.now)
+
+
+@dataclass
+class TurnResult:
+    """Co se stalo po zapsání tahu."""
+
+    turn: Turn
+    was_reset: bool
+    winner: str = ""
+
+
+class GameOver(Exception):
+    """Zápis do hry, která už má vítěze."""
+
+
+class Game:
+    def __init__(self, names: list[str], final_score: int = FINAL_SCORE,
+                 turns: list[Turn] | None = None) -> None:
+        if not names:
+            raise ValueError("Hra potřebuje alespoň jednoho hráče.")
+        if len(set(names)) != len(names):
+            raise ValueError("Jména hráčů musí být unikátní.")
+
+        self.names: list[str] = list(names)
+        self.final_score: int = final_score
+        self.turns: list[Turn] = list(turns) if turns else []
+
+    @property
+    def first(self) -> str:
+        return self.names[0]
+
+    @property
+    def current_player(self) -> str:
+        """Hráči se střídají dokola, takže tah plyne z počtu zápisů."""
+        return self.names[len(self.turns) % len(self.names)]
+
+    @property
+    def round_number(self) -> int:
+        return len(self.turns) // len(self.names) + 1
+
+    @property
+    def round_complete(self) -> bool:
+        """True, když všichni odehráli stejný počet tahů."""
+        return bool(self.turns) and len(self.turns) % len(self.names) == 0
+
+    @property
+    def winner(self) -> str:
+        """Vítěz se vyhlašuje jen po dokončeném kole, ne uprostřed."""
+        return self.check_win() if self.round_complete else ""
+
+    @property
+    def finished(self) -> bool:
+        return bool(self.winner)
+
+    def turns_of(self, player: str) -> list[Turn]:
+        return [t for t in self.turns if t.player == player]
+
+    def totals(self) -> dict[str, int]:
+        """Součty se nikdy neukládají, vždy se počítají z tahů."""
+        result = {name: 0 for name in self.names}
+        for turn in self.turns:
+            if turn.reset:
+                result[turn.player] = 0
+            else:
+                result[turn.player] += turn.value
+        return result
+
+    def zero_streak(self, player: str) -> int:
+        """Počet nul za sebou od posledního vynulování.
+
+        Živí pravidlo i indikátor "x"/"xx". Počítání se na vynulovacím tahu
+        zastaví, takže po vynulování začíná hráč zase od nuly.
+        """
+        streak = 0
+        for turn in reversed(self.turns_of(player)):
+            if turn.reset or turn.value != 0:
+                break
+            streak += 1
+        return streak
+
+    def add_score(self, value: int) -> TurnResult:
+        if self.finished:
+            raise GameOver("Hra už má vítěze.")
+
+        player = self.current_player
+        reset = value == 0 and self.zero_streak(player) >= ZEROS_TO_RESET - 1
+
+        turn = Turn(player=player, round=self.round_number, value=value, reset=reset)
+        self.turns.append(turn)
+
+        return TurnResult(turn=turn, was_reset=reset, winner=self.winner)
+
+    def undo(self) -> Turn | None:
+        """Vrátí poslední zápis. Dá se opakovat.
+
+        Protože jsou součty odvozené, stačí tah zahodit — platí to i pro
+        vracení vynulování.
+        """
+        return self.turns.pop() if self.turns else None
+
+    def check_win(self) -> str:
+        """Jméno vítěze, nebo prázdno když se hraje dál.
+
+        Při remíze na prvním místě vítěz není a hraje se dál.
+        """
+        totals = self.totals()
+        over_limit = {n: v for n, v in totals.items() if v >= self.final_score}
+        if not over_limit:
+            return ""
+
+        ranked = sorted(over_limit.items(), key=lambda x: x[1], reverse=True)
+        counts = Counter(value for _, value in ranked)
+        top_name, top_value = ranked[0]
+
+        return top_name if counts[top_value] == 1 else ""
+
+    def standings(self) -> list[tuple[int, str, int]]:
+        """Pořadí, jméno a skóre — seřazeno od nejlepšího."""
+        totals = self.totals()
+        ranked = sorted(totals.items(), key=lambda x: x[1], reverse=True)
+        return [(i + 1, name, value) for i, (name, value) in enumerate(ranked)]
+
+    def rounds(self) -> list[tuple[int, dict[str, Turn | None]]]:
+        """Zápisník po kolech pro tabuli: [(číslo kola, {hráč: tah nebo None})]."""
+        result: list[tuple[int, dict[str, Turn | None]]] = []
+        for index in range(0, len(self.turns), len(self.names)):
+            chunk = self.turns[index:index + len(self.names)]
+            by_player: dict[str, Turn | None] = {name: None for name in self.names}
+            for turn in chunk:
+                by_player[turn.player] = turn
+            result.append((index // len(self.names) + 1, by_player))
+        return result

dice.py

@@ -1,30 +1,34 @@
-import sys
-from collections import Counter
+# /// script
+# requires-python = ">=3.11"
+# dependencies = ["tabulate"]
+# ///
+"""Počitadlo skóre v terminálu.
+
+Pravidla žijí v `core.Game`, tenhle modul je jen vstup a výstup. Hraje se
+v paměti, nic se neukládá — na historii je webová aplikace (`web.py`).
+"""
+
 from os import name, system
 
 from tabulate import tabulate
 
-hraci = {}
-score = {}
-pointer = ""
-first = ""
-final_score = 10000
+from core import FINAL_SCORE, Game
+
+table_header = ["Hráč", "Skóre"]
+
 
 def clear() -> None:
-    _ = system('cls') if name == 'nt' else system('clear') 
+    _ = system('cls') if name == 'nt' else system('clear')
 
-def char_create() -> bool:
-    global pointer
-    global first
-    global final_score
+
+def char_create() -> tuple[list[str], int]:
+    """Zeptá se na hráče a cílové skóre."""
+    hraci: list[str] = []
 
     while True:
         inp: str = input("Zadejte jméno prvního hráče: ")
         if inp:
-            hraci[inp] = []
-            score[inp] = 0
-            pointer = inp
-            first = inp
+            hraci.append(inp)
             clear()
             print(f"Hráč/ka {inp} přidán(a).")
             break
@@ -40,12 +44,13 @@ def char_create() -> bool:
                 print("Je potřeba zadávat unikátní jména.")
             else:
                 clear()
-                hraci[inp] = []
-                score[inp] = 0
+                hraci.append(inp)
                 print(f"Hráč/ka {inp} přidán(a).")
         else:
             break
 
+    final_score: int = FINAL_SCORE
+
     while True:
         inp = input("Zadejte finální skóre (nechte prázdné pro výchozích 10 000): ")
         if inp != "":
@@ -59,103 +64,39 @@ def char_create() -> bool:
         else:
             break
 
-    return True
+    return hraci, final_score
 
-def next_player() -> None:
-    global pointer
 
-    keys_iter = iter(hraci)
-    for key in keys_iter:
-        if key == pointer:
-            nxt_key = next(keys_iter, first)
-            break
-
-    pointer = nxt_key
-
-table_header = ["Hráč", "Skóre"]
-
-def table():
+def table(game: Game) -> str:
     hraci_tab = []
-    for h, h_val in score.items():
-        hrac = h
-        if pointer == h:
-            hrac = "> "+h
-        hraci_tab.append([hrac, h_val])
+    for hrac, hodnota in game.totals().items():
+        if game.current_player == hrac:
+            hrac = "> " + hrac
+        hraci_tab.append([hrac, hodnota])
 
     return tabulate(hraci_tab, headers=table_header, tablefmt="fancy_grid")
 
-def add_score(hrac, hodnota):
-    if hodnota == 0:
-        last_two = hraci[hrac][-2:]
-        if len(last_two) > 1:
-            last_two_sum = sum(last_two)
-            if last_two_sum == 0:
-                hodnota = -sum(hraci[hrac])
-                clear()
-                input("Po třech nulových hodech bylo vaše skóre vynulováno.")
-
-    hraci[hrac].append(hodnota)
-    score[hrac] = sum(hraci[hrac])
-
-def to_sorted_tuple(d: dict[str, int], s: bool = True) -> tuple[list[tuple[int, str, int]],
-                                                                dict[str, int]]:
-    L: list[tuple[int, str, int]] = []
-
-    if s:
-        d = dict(sorted(d.items(), key=lambda x: x[1], reverse=True)) 
-
-    for i, (k, v) in enumerate(d.items()):
-        L.append((i+1, k, v))
-
-    return L, d
-
-def check_win() -> str:
-    over_limit: dict[str, int] = {}
-    for p in score:
-        if score[p] >= final_score:
-            over_limit[p] = score[p]
-
-    winner: str = ""
-
-    if over_limit:
-        L, d = to_sorted_tuple(over_limit)
-
-        count: Counter = Counter(list(d.values()))
-
-        for c in count:
-            if count[c] == 1:
-                winner = L[0][1]
-            break
-
-    return winner
-
-def win(winner: str, vitezne_skore: int) -> None:
-    results, d = to_sorted_tuple(score)
 
+def win(game: Game, winner: str) -> None:
     headers = ["Pořadí", "Hráč", "Skóre"]
-    vysledky = tabulate(results, headers=headers, tablefmt="fancy_grid")
+    vysledky = tabulate(game.standings(), headers=headers, tablefmt="fancy_grid")
 
-    print(f"Vítězem se stává {winner} s {vitezne_skore} body!")
+    print(f"Vítězem se stává {winner} s {game.totals()[winner]} body!")
     print("Díky za hru a zase příště.\n")
 
     print(vysledky)
 
-def game():
+
+def play(game: Game) -> None:
     while True:
         clear()
-        print(table())
+        print(table(game))
 
-        strikes: str = ""
+        pointer = game.current_player
+        strikes: str = "x" * game.zero_streak(pointer)
 
-        if len(hraci[pointer]) > 0:
-            if hraci[pointer][-1] == 0:
-                strikes = "x"
-                if len(hraci[pointer]) > 1 and hraci[pointer][-2] == 0:
-                    strikes += "x"
-        else:
-            strikes = ""
-
-        inp = input(f"Zadejte skóre hráče {pointer} ({score[pointer]}{strikes}/{final_score}): ")
+        inp = input(f"Zadejte skóre hráče {pointer} "
+                    f"({game.totals()[pointer]}{strikes}/{game.final_score}): ")
         try:
             inp_int = int(inp)
         except ValueError:
@@ -163,30 +104,27 @@ def game():
             input("Zadejte prosím platnou číselnou hodnotu.")
             continue
 
-        add_score(pointer, inp_int)
-        next_player()
+        result = game.add_score(inp_int)
 
-        if pointer == first:
-            winner: str = check_win()
-            if winner:
-                clear()
-                win(winner, score[winner])
-                break
+        if result.was_reset:
+            clear()
+            input("Po třech nulových hodech bylo vaše skóre vynulováno.")
+
+        if result.winner:
+            clear()
+            win(game, result.winner)
+            break
 
 
 def main() -> None:
     clear()
-    if char_create():
-        clear()
-        print("Vytvoření hráči:", ", ".join(list(hraci.keys())))
-    else:
-        print("Nastala chyba při vytváření uživatelů.")
-        sys.exit()
+    hraci, final_score = char_create()
+    clear()
+    print("Vytvoření hráči:", ", ".join(hraci))
 
     input("Stiskněte libovolnou klávesu pro pokračování. ")
 
-    game()
-
+    play(Game(hraci, final_score))
 
 
 if __name__ == "__main__":

net.py

@@ -0,0 +1,151 @@
+"""Zjištění adres, na kterých je počitadlo dostupné.
+
+Telefon a notebook se musí potkat na stejné síti a která to je, se během
+večera mění — domácí WiFi, hotspot z telefonu, tailnet. Proto se adresy
+hledají za běhu, hledá se jich víc a řadí se podle toho, jak pravděpodobně
+povedou k cíli. Vybrat si může člověk; my jen nabídneme.
+
+Nic se tu nezakazuje podle jména konkrétního rozhraní — rozhoduje rozsah
+adresy a obecný typ rozhraní, ne to, co má kdo zrovna nainstalované.
+"""
+
+import ipaddress
+import os
+import socket
+from dataclasses import dataclass
+
+# Rozsah, ze kterého adresy přiděluje Tailscale (RFC 6598, CGNAT).
+TAILNET = ipaddress.ip_network("100.64.0.0/10")
+
+# Obvyklé předpony virtuálních rozhraní. Adresy z nich nezahazujeme, jen je
+# řadíme nakonec — dostat se přes ně k počitadlu jde jen výjimečně.
+VIRTUAL = ("docker", "br-", "virbr", "veth", "vmnet", "vboxnet", "tun", "tap")
+
+KIND_LABELS = {
+    "lan": "místní síť",
+    "tailnet": "přes Tailscale",
+    "public": "veřejná adresa",
+    "virtual": "virtuální síť",
+}
+
+ORDER = {"lan": 0, "tailnet": 1, "public": 2, "virtual": 3}
+
+
+@dataclass
+class Address:
+    ip: str
+    interface: str
+    kind: str
+    primary: bool = False
+
+    @property
+    def label(self) -> str:
+        return KIND_LABELS.get(self.kind, self.kind)
+
+    def url(self, port: int) -> str:
+        return f"http://{self.ip}:{port}"
+
+
+def classify(ip: str, interface: str) -> str | None:
+    """Typ adresy podle jejího rozsahu. None znamená nepoužitelná."""
+    try:
+        addr = ipaddress.ip_address(ip)
+    except ValueError:
+        return None
+
+    if addr.is_loopback or addr.is_link_local or addr.is_unspecified:
+        return None
+
+    if addr in TAILNET:
+        return "tailnet"
+
+    if interface.startswith(VIRTUAL):
+        return "virtual"
+
+    return "lan" if addr.is_private else "public"
+
+
+def rank(found: list[tuple[str, str]], primary: str | None) -> list[Address]:
+    """Seřadí nalezené dvojice (rozhraní, adresa).
+
+    První je adresa, přes kterou vede výchozí trasa — na té síti je telefon
+    nejspíš taky. Zbytek podle typu. Čistá funkce, ať jde otestovat i to,
+    co zrovna není v systému.
+    """
+    seen: dict[str, Address] = {}
+
+    for interface, ip in found:
+        kind = classify(ip, interface)
+        if kind is None or ip in seen:
+            continue
+        seen[ip] = Address(ip=ip, interface=interface, kind=kind,
+                           primary=(ip == primary))
+
+    return sorted(seen.values(),
+                  key=lambda a: (not a.primary, ORDER.get(a.kind, 9), a.ip))
+
+
+def default_route_address() -> str | None:
+    """Adresa rozhraní, kudy vede výchozí trasa.
+
+    Připojení UDP socketu nic neposílá, jen si vyžádá směrování.
+    """
+    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    try:
+        sock.connect(("10.255.255.255", 1))
+        return sock.getsockname()[0]
+    except OSError:
+        return None
+    finally:
+        sock.close()
+
+
+def _from_interfaces() -> list[tuple[str, str]]:
+    """Adresy všech rozhraní. Linux, jen standardní knihovna."""
+    try:
+        import fcntl
+        import struct
+    except ImportError:
+        return []
+
+    siocgifaddr = 0x8915
+    found = []
+
+    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
+        for _index, name in socket.if_nameindex():
+            try:
+                packed = struct.pack("256s", name.encode()[:15])
+                info = fcntl.ioctl(sock.fileno(), siocgifaddr, packed)
+                found.append((name, socket.inet_ntoa(info[20:24])))
+            except OSError:
+                continue        # rozhraní bez IPv4 adresy
+
+    return found
+
+
+def _from_hostname() -> list[tuple[str, str]]:
+    """Záloha pro systémy, kde předchozí cesta nefunguje."""
+    try:
+        infos = socket.getaddrinfo(socket.gethostname(), None, socket.AF_INET)
+    except OSError:
+        return []
+
+    return [("", info[4][0]) for info in infos]
+
+
+def addresses() -> list[Address]:
+    """Kde všude je počitadlo k dispozici, od nejpravděpodobnější adresy.
+
+    `DICE_HOST` má poslední slovo — když je nastavená, platí jen ona.
+    """
+    forced = os.environ.get("DICE_HOST")
+    if forced:
+        return [Address(ip=forced, interface="", kind="lan", primary=True)]
+
+    primary = default_route_address()
+
+    found = _from_interfaces() or _from_hostname()
+    if primary and primary not in [ip for _name, ip in found]:
+        found.append(("", primary))
+
+    return rank(found, primary)

pytest.ini

@@ -0,0 +1,4 @@
+[pytest]
+# Testy sahají na moduly v kořeni repa, ne na nainstalovaný balíček.
+pythonpath = .
+testpaths = tests

requirements.txt

@@ -0,0 +1,4 @@
+flask
+qrcode
+tabulate
+pytest

static/style.css

@@ -0,0 +1,495 @@
+/* Počitadlo v kostkách.
+   Vizuálně stojí na tom, co nahrazuje: čtverečkovaný papír a dvě propisky —
+   modrá zapisuje, červená škrtá. Zvýrazňovač ukazuje, kdo je na tahu. */
+
+:root {
+  color-scheme: light;
+
+  --paper:     #FBFAF6;
+  --grid:      rgba(27, 59, 111, 0.06);
+  --rule:      #C3D0E2;
+  --ink:       #1B3B6F;
+  --ink-soft:  #6C7C9B;
+  --red:       #CB2B25;
+  --marker:    #FFE7A0;
+
+  --font-voice: Georgia, "Times New Roman", serif;
+  --font-ui:    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+  --font-num:   ui-monospace, "SF Mono", "Cascadia Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
+
+  --step: 1.5rem;
+}
+
+* { box-sizing: border-box; }
+
+body {
+  margin: 0;
+  padding: var(--step);
+  min-height: 100vh;
+  color: var(--ink);
+  font-family: var(--font-ui);
+  background-color: var(--paper);
+  background-image:
+    linear-gradient(var(--grid) 1px, transparent 1px),
+    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
+  background-size: 24px 24px;
+}
+
+a { color: var(--ink); }
+
+/* --- hlavička ------------------------------------------------------------ */
+
+.masthead {
+  display: flex;
+  align-items: flex-end;
+  justify-content: space-between;
+  gap: var(--step);
+  flex-wrap: wrap;
+  border-bottom: 2px solid var(--ink);
+  padding-bottom: 0.6rem;
+  margin-bottom: var(--step);
+}
+
+.masthead h1 {
+  font-family: var(--font-voice);
+  font-size: clamp(1.6rem, 4vw, 2.4rem);
+  font-weight: 400;
+  letter-spacing: -0.01em;
+  margin: 0;
+}
+
+.eyebrow {
+  font-size: 0.72rem;
+  letter-spacing: 0.16em;
+  text-transform: uppercase;
+  color: var(--ink-soft);
+  margin: 0 0 0.2rem;
+}
+
+.meta {
+  font-family: var(--font-num);
+  font-size: 0.85rem;
+  color: var(--ink-soft);
+}
+
+/* --- zápisník ------------------------------------------------------------ */
+
+.sheet-wrap { overflow-x: auto; }
+
+.sheet {
+  border-collapse: collapse;
+  width: 100%;
+  background: #FFFFFF;
+  font-family: var(--font-num);
+  font-variant-numeric: tabular-nums;
+}
+
+.sheet th,
+.sheet td {
+  border: 1px solid var(--rule);
+  padding: 0.7rem 1.2rem;
+  text-align: right;
+  white-space: nowrap;
+}
+
+.sheet thead th {
+  font-family: var(--font-ui);
+  font-size: 0.9rem;
+  letter-spacing: 0.1em;
+  text-transform: uppercase;
+  font-weight: 600;
+  color: var(--ink-soft);
+  border-bottom-width: 2px;
+  border-bottom-color: var(--ink);
+}
+
+.sheet .label {
+  text-align: left;
+  color: var(--ink-soft);
+  font-size: 0.85rem;
+  width: 1%;              /* sloupec s číslem kola se smrskne na obsah */
+  white-space: nowrap;
+}
+
+.sheet tbody td { font-size: 1.5rem; }
+
+.sheet .empty { color: var(--rule); }
+
+/* Zvýrazňovač na sloupci hráče, který je na tahu. Nerovnoměrný, jako tah fixem. */
+.marked {
+  background: linear-gradient(
+    180deg,
+    rgba(255, 231, 160, 0.35) 0%,
+    rgba(255, 231, 160, 0.9) 18%,
+    rgba(255, 231, 160, 0.75) 82%,
+    rgba(255, 231, 160, 0.3) 100%
+  );
+}
+
+/* Škrtnuté zápisy před vynulováním. */
+.struck {
+  color: var(--ink-soft);
+  text-decoration: line-through;
+  text-decoration-color: var(--red);
+  text-decoration-thickness: 2px;
+}
+
+.wiped { color: var(--red); }
+
+.wiped small {
+  display: block;
+  font-family: var(--font-ui);
+  font-size: 0.6rem;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.sheet .totals td {
+  border-bottom: 2px solid var(--ink);
+  font-size: 2.1rem;
+  font-weight: 700;
+}
+
+.sheet .totals .label { font-weight: 400; font-size: 0.85rem; }
+
+.sheet .more td {
+  text-align: left;
+  color: var(--ink-soft);
+  font-size: 0.85rem;
+  font-family: var(--font-ui);
+}
+
+/* --- nuly za sebou ------------------------------------------------------- */
+
+.ticks {
+  color: var(--red);
+  font-size: 0.9em;
+  letter-spacing: 0.15em;
+}
+
+.warning {
+  color: var(--red);
+  font-size: 0.85rem;
+  margin: 0.6rem 0 0;
+}
+
+/* --- zadávací pohled ----------------------------------------------------- */
+
+.phone { max-width: 30rem; margin: 0 auto; }
+
+.turn {
+  border: 2px solid var(--ink);
+  background: var(--paper);
+  padding: 1.2rem;
+  margin-bottom: var(--step);
+}
+
+.turn h2 {
+  font-family: var(--font-voice);
+  font-size: clamp(2rem, 9vw, 3rem);
+  font-weight: 400;
+  margin: 0.1rem 0 0.4rem;
+  line-height: 1.05;
+}
+
+.progress {
+  font-family: var(--font-num);
+  font-size: 1.1rem;
+  color: var(--ink-soft);
+  margin: 0;
+}
+
+.progress strong { color: var(--ink); font-size: 1.35rem; }
+
+input[type="number"] {
+  width: 100%;
+  font-family: var(--font-num);
+  font-size: 1.6rem;
+  padding: 0.7rem 0.8rem;
+  color: var(--ink);
+  background: transparent;
+  border: 1px solid var(--rule);
+  border-radius: 0;
+}
+
+input[type="text"] {
+  width: 100%;
+  font-family: var(--font-ui);
+  font-size: 1.1rem;
+  padding: 0.7rem 0.8rem;
+  color: var(--ink);
+  background: transparent;
+  border: 1px solid var(--rule);
+  border-radius: 0;
+}
+
+input:focus-visible,
+button:focus-visible,
+a:focus-visible {
+  outline: 3px solid var(--red);
+  outline-offset: 2px;
+}
+
+.field { margin-bottom: 0.8rem; }
+
+.field label {
+  display: block;
+  font-size: 0.75rem;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--ink-soft);
+  margin-bottom: 0.35rem;
+}
+
+button {
+  font-family: var(--font-ui);
+  font-size: 1rem;
+  cursor: pointer;
+  border-radius: 0;
+}
+
+.btn {
+  width: 100%;
+  padding: 0.9rem;
+  border: 2px solid var(--ink);
+  background: var(--ink);
+  color: var(--paper);
+  font-weight: 600;
+  letter-spacing: 0.02em;
+}
+
+.btn:hover { background: #16305c; }
+
+.btn-quiet {
+  background: transparent;
+  color: var(--ink);
+  border: 1px solid var(--rule);
+  font-weight: 400;
+}
+
+.btn-quiet:hover { border-color: var(--ink); }
+
+.btn-danger { color: var(--red); border-color: var(--red); }
+
+.actions {
+  display: flex;
+  gap: 0.6rem;
+  margin-top: var(--step);
+}
+
+.actions form { flex: 1; }
+.actions button { width: 100%; padding: 0.75rem 0.5rem; }
+
+.standings {
+  width: 100%;
+  border-collapse: collapse;
+  font-family: var(--font-num);
+  font-variant-numeric: tabular-nums;
+}
+
+.standings td { padding: 0.45rem 0; border-bottom: 1px solid var(--rule); }
+.standings td:last-child { text-align: right; font-weight: 600; }
+.standings .rank { color: var(--ink-soft); width: 2.5rem; }
+.standings .self { font-family: var(--font-ui); }
+
+.error {
+  border-left: 3px solid var(--red);
+  color: var(--red);
+  padding: 0.5rem 0.8rem;
+  margin-bottom: var(--step);
+  font-size: 0.9rem;
+}
+
+/* --- výběr hráčů --------------------------------------------------------- */
+
+.chips {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  margin-bottom: 0.8rem;
+}
+
+.chip {
+  font-family: var(--font-ui);
+  font-size: 1rem;
+  padding: 0.7rem 1rem;
+  border: 1px solid var(--rule);
+  background: transparent;
+  color: var(--ink);
+  display: inline-flex;
+  align-items: baseline;
+  gap: 0.5rem;
+}
+
+.chip[aria-pressed="true"] {
+  border-color: var(--ink);
+  background: var(--marker);
+  font-weight: 600;
+}
+
+.chip .seat {
+  font-family: var(--font-num);
+  font-size: 0.75rem;
+  color: var(--ink-soft);
+}
+
+.chip[aria-pressed="true"] .seat { color: var(--ink); }
+
+.hint {
+  color: var(--ink-soft);
+  font-size: 0.85rem;
+  margin: 0 0 var(--step);
+}
+
+.add-player { display: flex; gap: 0.5rem; }
+.add-player input { flex: 1; }
+.add-player button { padding: 0 1rem; border: 1px solid var(--ink); background: transparent; }
+
+.notice {
+  border: 1px solid var(--rule);
+  border-left: 3px solid var(--ink);
+  padding: 0.8rem 1rem;
+  margin-bottom: var(--step);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 1rem;
+  flex-wrap: wrap;
+}
+
+/* --- tabule -------------------------------------------------------------- */
+
+.board { max-width: 64rem; margin: 0 auto; }
+
+.join {
+  display: flex;
+  align-items: center;
+  gap: 0.9rem;
+}
+
+.join .address {
+  font-family: var(--font-num);
+  font-size: 0.95rem;
+  line-height: 1.4;
+}
+
+.join .address span {
+  display: block;
+  font-family: var(--font-ui);
+  font-size: 0.7rem;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--ink-soft);
+}
+
+.qr { width: 5.5rem; height: 5.5rem; fill: var(--ink); }
+
+.idle {
+  text-align: center;
+  padding-top: 12vh;
+}
+
+.idle .join { justify-content: center; margin-top: var(--step); }
+.idle .qr { width: 9rem; height: 9rem; }
+
+/* --- vyhlášení ----------------------------------------------------------- */
+
+.win {
+  border: 2px solid var(--ink);
+  padding: 1.4rem var(--step);
+  margin-bottom: var(--step);
+  background: var(--marker);
+}
+
+.win h2 {
+  font-family: var(--font-voice);
+  font-size: clamp(1.8rem, 5vw, 3rem);
+  font-weight: 400;
+  margin: 0.2rem 0 0.4rem;
+}
+
+.win p { margin: 0; color: var(--ink-soft); }
+
+/* --- odkazy dole --------------------------------------------------------- */
+
+.footer {
+  margin-top: calc(var(--step) * 2);
+  padding-top: 0.8rem;
+  border-top: 1px solid var(--rule);
+  font-size: 0.85rem;
+  color: var(--ink-soft);
+  display: flex;
+  gap: 1.2rem;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  * { transition: none !important; animation: none !important; }
+}
+
+/* --- síň slávy ----------------------------------------------------------- */
+
+.records {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
+  gap: 1px;
+  background: var(--rule);
+  border: 1px solid var(--rule);
+  margin-bottom: calc(var(--step) * 2);
+}
+
+.record {
+  background: #FFFFFF;
+  padding: 1.2rem 1.4rem;
+}
+
+.record .number {
+  font-family: var(--font-num);
+  font-variant-numeric: tabular-nums;
+  font-size: 2.6rem;
+  margin: 0.2rem 0 0.3rem;
+  line-height: 1;
+}
+
+.record .number small {
+  font-family: var(--font-ui);
+  font-size: 0.9rem;
+  color: var(--ink-soft);
+}
+
+.record .who {
+  font-size: 0.85rem;
+  color: var(--ink-soft);
+  margin: 0;
+}
+
+.sheet .name {
+  font-family: var(--font-ui);
+  font-size: 1rem;
+  color: var(--ink);
+}
+
+/* --- další cesty k počitadlu --------------------------------------------- */
+
+.alt {
+  list-style: none;
+  margin: 0.4rem 0 0;
+  padding: 0;
+  font-size: 0.8rem;
+  color: var(--ink-soft);
+}
+
+.alt li { white-space: nowrap; }
+
+.alt em {
+  font-family: var(--font-ui);
+  font-style: normal;
+  font-size: 0.68rem;
+  letter-spacing: 0.06em;
+  text-transform: uppercase;
+}
+
+.address code {
+  font-family: var(--font-num);
+  font-size: 0.85em;
+  color: var(--ink);
+}

stats.py

@@ -0,0 +1,124 @@
+"""Statistiky napříč hrami.
+
+Dvě různé obrazovky, protože odpovídají na jiné otázky: síň slávy sbírá
+rekordy, kariéra ukazuje, kdo je dlouhodobě dobrý.
+
+Vědomě tu není celkový součet bodů napříč hrami — cílové skóre je u každé hry
+jiné, hry nejsou srovnatelné a taková metrika by odměňovala jen toho, kdo hrál
+nejvíc.
+"""
+
+import sqlite3
+
+import storage
+
+# Celkové skóre hráče ve hře: součet tahů po posledním vynulování.
+# Stejné pravidlo jako v core.Game.totals(), jen vyjádřené v SQL.
+TOTALS = """
+WITH last_reset AS (
+    SELECT game_id, player_id, MAX(id) AS reset_id
+    FROM turns
+    WHERE reset = 1
+    GROUP BY game_id, player_id
+),
+totals AS (
+    SELECT gp.game_id,
+           gp.player_id,
+           COALESCE((
+               SELECT SUM(t.value)
+               FROM turns t
+               LEFT JOIN last_reset lr
+                      ON lr.game_id = t.game_id AND lr.player_id = t.player_id
+               WHERE t.game_id = gp.game_id
+                 AND t.player_id = gp.player_id
+                 AND (lr.reset_id IS NULL OR t.id > lr.reset_id)
+           ), 0) AS total
+    FROM game_players gp
+)
+"""
+
+
+def records(conn: sqlite3.Connection) -> dict:
+    """Síň slávy — tři rekordy, které jde překonat."""
+    best_turn = conn.execute("""
+        SELECT p.name, t.value, t.game_id, t.at
+        FROM turns t
+        JOIN players p ON p.id = t.player_id
+        ORDER BY t.value DESC, t.id ASC
+        LIMIT 1
+    """).fetchone()
+
+    best_score = conn.execute(TOTALS + """
+        SELECT p.name, totals.total, g.id AS game_id, g.finished_at
+        FROM totals
+        JOIN games g ON g.id = totals.game_id
+        JOIN players p ON p.id = totals.player_id
+        WHERE g.status = ?
+        ORDER BY totals.total DESC
+        LIMIT 1
+    """, (storage.STATUS_FINISHED,)).fetchone()
+
+    fastest = conn.execute("""
+        SELECT p.name, g.id AS game_id, MAX(t.round) AS rounds, g.finished_at
+        FROM games g
+        JOIN turns t ON t.game_id = g.id
+        JOIN players p ON p.id = g.winner_id
+        WHERE g.status = ?
+        GROUP BY g.id
+        ORDER BY rounds ASC, g.id ASC
+        LIMIT 1
+    """, (storage.STATUS_FINISHED,)).fetchone()
+
+    return {"best_turn": best_turn, "best_score": best_score, "fastest": fastest}
+
+
+def careers(conn: sqlite3.Connection) -> list[dict]:
+    """Kdo je dlouhodobě dobrý. Počítají se jen dohrané hry."""
+    placings = conn.execute(TOTALS + """
+        , ranked AS (
+            SELECT totals.game_id,
+                   totals.player_id,
+                   RANK() OVER (PARTITION BY totals.game_id
+                                ORDER BY totals.total DESC) AS placing
+            FROM totals
+            JOIN games g ON g.id = totals.game_id
+            WHERE g.status = ?
+        )
+        SELECT r.player_id,
+               p.name,
+               COUNT(*) AS games,
+               SUM(CASE WHEN g.winner_id = r.player_id THEN 1 ELSE 0 END) AS wins,
+               AVG(r.placing) AS placing
+        FROM ranked r
+        JOIN players p ON p.id = r.player_id
+        JOIN games g ON g.id = r.game_id
+        GROUP BY r.player_id
+    """, (storage.STATUS_FINISHED,)).fetchall()
+
+    turn_stats = conn.execute("""
+        SELECT t.player_id,
+               AVG(t.value) AS per_turn,
+               SUM(t.reset) AS wipeouts
+        FROM turns t
+        JOIN games g ON g.id = t.game_id
+        WHERE g.status = ?
+        GROUP BY t.player_id
+    """, (storage.STATUS_FINISHED,)).fetchall()
+
+    by_player = {row["player_id"]: row for row in turn_stats}
+
+    table = []
+    for row in placings:
+        turns = by_player.get(row["player_id"])
+        table.append({
+            "name": row["name"],
+            "games": row["games"],
+            "wins": row["wins"],
+            "share": row["wins"] / row["games"] if row["games"] else 0,
+            "placing": row["placing"],
+            "per_turn": turns["per_turn"] if turns else 0,
+            "wipeouts": turns["wipeouts"] if turns else 0,
+        })
+
+    table.sort(key=lambda r: (-r["share"], r["placing"], -r["games"]))
+    return table

storage.py

@@ -0,0 +1,289 @@
+"""Trvalé úložiště nad SQLite.
+
+Ručně psané SQL nad pěti tabulkami, žádné ORM. Hry ukazují na `players.id`,
+nikdy na jméno — přejmenování hráče se tím propíše i do starých her.
+
+Součty se nikde neukládají; stav hry se rekonstruuje načtením tahů do
+`core.Game`.
+"""
+
+import os
+import re
+import sqlite3
+from datetime import datetime
+from pathlib import Path
+
+from core import FINAL_SCORE, Game, Turn
+
+DB_PATH = Path(os.environ.get("DICE_DB", "dice.db"))
+
+STATUS_RUNNING = "probíhá"
+STATUS_FINISHED = "dohráno"
+STATUS_ABANDONED = "opuštěno"
+
+SCHEMA = """
+CREATE TABLE IF NOT EXISTS players (
+    id         INTEGER PRIMARY KEY,
+    name       TEXT NOT NULL,
+    key        TEXT NOT NULL UNIQUE,
+    created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS games (
+    id          INTEGER PRIMARY KEY,
+    final_score INTEGER NOT NULL,
+    status      TEXT NOT NULL,
+    winner_id   INTEGER REFERENCES players(id),
+    started_at  TEXT NOT NULL,
+    finished_at TEXT
+);
+
+CREATE TABLE IF NOT EXISTS game_players (
+    game_id   INTEGER NOT NULL REFERENCES games(id),
+    player_id INTEGER NOT NULL REFERENCES players(id),
+    seat      INTEGER NOT NULL,
+    PRIMARY KEY (game_id, player_id)
+);
+
+CREATE TABLE IF NOT EXISTS turns (
+    id        INTEGER PRIMARY KEY,
+    game_id   INTEGER NOT NULL REFERENCES games(id),
+    player_id INTEGER NOT NULL REFERENCES players(id),
+    round     INTEGER NOT NULL,
+    value     INTEGER NOT NULL,
+    reset     INTEGER NOT NULL DEFAULT 0,
+    at        TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS turns_game ON turns(game_id, id);
+"""
+
+
+def connect(path: Path | str | None = None) -> sqlite3.Connection:
+    conn = sqlite3.connect(path or DB_PATH)
+    conn.row_factory = sqlite3.Row
+    conn.execute("PRAGMA foreign_keys = ON")
+    conn.executescript(SCHEMA)
+    return conn
+
+
+def now() -> str:
+    """Časy ukládáme jako ISO text — sqlite3 vlastní adaptéry pro datetime
+    mezitím zavrhl."""
+    return datetime.now().isoformat(timespec="seconds")
+
+
+# --- hráči ------------------------------------------------------------------
+
+def normalize(name: str) -> str:
+    """Klíč pro párování jmen napříč hrami: Adam, adam i " Adam " je týž hráč."""
+    return re.sub(r"\s+", " ", name).strip().casefold()
+
+
+def get_or_create_player(conn: sqlite3.Connection, name: str) -> int:
+    name = re.sub(r"\s+", " ", name).strip()
+    if not name:
+        raise ValueError("Jméno nesmí být prázdné.")
+
+    key = normalize(name)
+    row = conn.execute("SELECT id FROM players WHERE key = ?", (key,)).fetchone()
+    if row:
+        return row["id"]
+
+    cursor = conn.execute(
+        "INSERT INTO players (name, key, created_at) VALUES (?, ?, ?)",
+        (name, key, now()),
+    )
+    conn.commit()
+    return cursor.lastrowid
+
+
+def known_players(conn: sqlite3.Connection) -> list[sqlite3.Row]:
+    """Známí hráči k odklikání, naposledy hrající první."""
+    return conn.execute("""
+        SELECT p.id, p.name, MAX(t.at) AS last_played
+        FROM players p
+        LEFT JOIN turns t ON t.player_id = p.id
+        GROUP BY p.id
+        ORDER BY last_played DESC, p.name COLLATE NOCASE
+    """).fetchall()
+
+
+def rename_player(conn: sqlite3.Connection, player_id: int, name: str) -> None:
+    name = re.sub(r"\s+", " ", name).strip()
+    if not name:
+        raise ValueError("Jméno nesmí být prázdné.")
+
+    conn.execute("UPDATE players SET name = ?, key = ? WHERE id = ?",
+                 (name, normalize(name), player_id))
+    conn.commit()
+
+
+def merge_players(conn: sqlite3.Connection, source_id: int, target_id: int) -> None:
+    """Sloučí hráče vzniklého překlepem do toho správného."""
+    if source_id == target_id:
+        return
+
+    # Kdyby oba omylem hráli tutéž hru, druhé sedadlo zahodíme.
+    conn.execute("""
+        DELETE FROM game_players
+        WHERE player_id = ?
+          AND game_id IN (SELECT game_id FROM game_players WHERE player_id = ?)
+    """, (source_id, target_id))
+
+    conn.execute("UPDATE game_players SET player_id = ? WHERE player_id = ?",
+                 (target_id, source_id))
+    conn.execute("UPDATE turns SET player_id = ? WHERE player_id = ?",
+                 (target_id, source_id))
+    conn.execute("UPDATE games SET winner_id = ? WHERE winner_id = ?",
+                 (target_id, source_id))
+    conn.execute("DELETE FROM players WHERE id = ?", (source_id,))
+    conn.commit()
+
+
+# --- hry --------------------------------------------------------------------
+
+def create_game(conn: sqlite3.Connection, names: list[str],
+                final_score: int = FINAL_SCORE) -> int:
+    """Založí hru. Pořadí jmen je pořadí u stolu."""
+    ids = [get_or_create_player(conn, name) for name in names]
+    if len(set(ids)) != len(ids):
+        raise ValueError("Každý hráč může u stolu sedět jen jednou.")
+
+    cursor = conn.execute(
+        "INSERT INTO games (final_score, status, started_at) VALUES (?, ?, ?)",
+        (final_score, STATUS_RUNNING, now()),
+    )
+    game_id = cursor.lastrowid
+
+    conn.executemany(
+        "INSERT INTO game_players (game_id, player_id, seat) VALUES (?, ?, ?)",
+        [(game_id, player_id, seat) for seat, player_id in enumerate(ids)],
+    )
+    conn.commit()
+    return game_id
+
+
+def game_row(conn: sqlite3.Connection, game_id: int) -> sqlite3.Row | None:
+    return conn.execute("""
+        SELECT g.*, w.name AS winner_name
+        FROM games g
+        LEFT JOIN players w ON w.id = g.winner_id
+        WHERE g.id = ?
+    """, (game_id,)).fetchone()
+
+
+def seating(conn: sqlite3.Connection, game_id: int) -> list[sqlite3.Row]:
+    return conn.execute("""
+        SELECT p.id, p.name
+        FROM game_players gp
+        JOIN players p ON p.id = gp.player_id
+        WHERE gp.game_id = ?
+        ORDER BY gp.seat
+    """, (game_id,)).fetchall()
+
+
+def load_game(conn: sqlite3.Connection, game_id: int) -> Game:
+    """Rekonstruuje `core.Game` z uložených tahů."""
+    row = game_row(conn, game_id)
+    if row is None:
+        raise LookupError(f"Hra {game_id} neexistuje.")
+
+    names = [player["name"] for player in seating(conn, game_id)]
+
+    turn_rows = conn.execute("""
+        SELECT p.name, t.round, t.value, t.reset, t.at
+        FROM turns t
+        JOIN players p ON p.id = t.player_id
+        WHERE t.game_id = ?
+        ORDER BY t.id
+    """, (game_id,)).fetchall()
+
+    turns = [
+        Turn(player=t["name"], round=t["round"], value=t["value"],
+             reset=bool(t["reset"]), at=datetime.fromisoformat(t["at"]))
+        for t in turn_rows
+    ]
+
+    return Game(names, final_score=row["final_score"], turns=turns)
+
+
+def running_game(conn: sqlite3.Connection) -> int | None:
+    """Poslední rozehraná hra — díky ní se dá po pádu serveru pokračovat."""
+    row = conn.execute(
+        "SELECT id FROM games WHERE status = ? ORDER BY id DESC LIMIT 1",
+        (STATUS_RUNNING,),
+    ).fetchone()
+    return row["id"] if row else None
+
+
+def recent_games(conn: sqlite3.Connection, limit: int = 20) -> list[sqlite3.Row]:
+    return conn.execute("""
+        SELECT g.id, g.final_score, g.status, g.started_at, g.finished_at,
+               w.name AS winner_name,
+               (SELECT COUNT(*) FROM game_players gp WHERE gp.game_id = g.id) AS players,
+               (SELECT COUNT(*) FROM turns t WHERE t.game_id = g.id) AS turns
+        FROM games g
+        LEFT JOIN players w ON w.id = g.winner_id
+        ORDER BY g.id DESC
+        LIMIT ?
+    """, (limit,)).fetchall()
+
+
+# --- tahy -------------------------------------------------------------------
+
+def add_turn(conn: sqlite3.Connection, game_id: int, turn: Turn) -> None:
+    """Zapisuje se hned po každém tahu, ne až na konci hry."""
+    row = conn.execute("""
+        SELECT p.id
+        FROM game_players gp
+        JOIN players p ON p.id = gp.player_id
+        WHERE gp.game_id = ? AND p.name = ?
+    """, (game_id, turn.player)).fetchone()
+
+    if row is None:
+        raise LookupError(f"Hráč {turn.player} v této hře nehraje.")
+
+    conn.execute("""
+        INSERT INTO turns (game_id, player_id, round, value, reset, at)
+        VALUES (?, ?, ?, ?, ?, ?)
+    """, (game_id, row["id"], turn.round, turn.value, int(turn.reset),
+          turn.at.isoformat(timespec="seconds")))
+    conn.commit()
+
+
+def undo_turn(conn: sqlite3.Connection, game_id: int) -> bool:
+    """Zahodí poslední zápis. Dá se opakovat."""
+    row = conn.execute(
+        "SELECT id FROM turns WHERE game_id = ? ORDER BY id DESC LIMIT 1",
+        (game_id,),
+    ).fetchone()
+    if row is None:
+        return False
+
+    conn.execute("DELETE FROM turns WHERE id = ?", (row["id"],))
+    conn.execute(
+        "UPDATE games SET status = ?, winner_id = NULL, finished_at = NULL WHERE id = ?",
+        (STATUS_RUNNING, game_id),
+    )
+    conn.commit()
+    return True
+
+
+def finish_game(conn: sqlite3.Connection, game_id: int, winner: str) -> None:
+    row = conn.execute("SELECT id FROM players WHERE key = ?",
+                       (normalize(winner),)).fetchone()
+    conn.execute(
+        "UPDATE games SET status = ?, winner_id = ?, finished_at = ? WHERE id = ?",
+        (STATUS_FINISHED, row["id"] if row else None, now(), game_id),
+    )
+    conn.commit()
+
+
+def abandon_game(conn: sqlite3.Connection, game_id: int) -> None:
+    """Nedohrané hry se nepočítají do statistik výher."""
+    conn.execute(
+        "UPDATE games SET status = ?, finished_at = ? WHERE id = ?",
+        (STATUS_ABANDONED, now(), game_id),
+    )
+    conn.commit()

templates/_head.html

@@ -0,0 +1,5 @@
+{# data-address si hlídá tabule: když se notebook přesune na jinou síť,
+   je v QR kódu stará adresa a stránka se sama načte znovu. #}
+<p class="eyebrow">Zápisník · hra {{ game_id }}</p>
+<h1>{% if winner %}Konec hry{% else %}Na tahu {{ current }}{% endif %}</h1>
+<p class="meta">do {{ game.final_score|cislo }} bodů · kolo {{ game.round_number }}</p>

templates/_join.html

@@ -0,0 +1,22 @@
+{# Kudy se na počitadlo dostane telefon. Nabídneme víc cest, vybrat si může člověk. #}
+{% if primary %}
+<div class="join">
+  {{ target|qr }}
+  <div class="address">
+    <span>Zapisuje se z telefonu</span>
+    {{ target }}
+    {% if others %}
+    <ul class="alt">
+      {% for address in others %}
+      <li>{{ address.ip }}:{{ port }} <em>{{ address.label }}</em></li>
+      {% endfor %}
+    </ul>
+    {% endif %}
+  </div>
+</div>
+{% else %}
+<div class="join">
+  <p class="address"><span>Adresu se nepodařilo zjistit</span>
+    Spusť server s <code>DICE_HOST=&lt;adresa&gt;</code>.</p>
+</div>
+{% endif %}

templates/_panel.html

@@ -0,0 +1,3 @@
+{# Fragment pro tabuli: obě části, které se během hry mění. #}
+<div id="head" data-address="{{ primary_ip }}">{% include "_head.html" %}</div>
+<div id="sheet">{% include "_sheet.html" %}</div>

templates/_sheet.html

@@ -0,0 +1,66 @@
+{% if winner %}
+<div class="win">
+  <p class="eyebrow">Konec hry</p>
+  <h2>{{ winner }}</h2>
+  <p>Vyhrává s {{ totals[winner]|cislo }} body z cílových {{ game.final_score|cislo }}.</p>
+</div>
+{% endif %}
+
+<div class="sheet-wrap">
+  <table class="sheet">
+    <thead>
+      <tr>
+        <th class="label">Kolo</th>
+        {% for name in game.names %}
+        <th class="{{ 'marked' if name == current }}">{{ name }}</th>
+        {% endfor %}
+      </tr>
+    </thead>
+
+    {# Součty patří nahoru: po padesáti kolech by je jinak nikdo neviděl. #}
+    <tbody class="totals">
+      <tr>
+        <td class="label">Celkem</td>
+        {% for name in game.names %}
+        <td class="{{ 'marked' if name == current }}">
+          {{ totals[name]|cislo }}
+          {%- if streaks[name] %} <span class="ticks">{{ '✕' * streaks[name] }}</span>{% endif %}
+        </td>
+        {% endfor %}
+      </tr>
+    </tbody>
+
+    <tbody>
+      {% for row in rows %}
+      <tr>
+        <td class="label">{{ row.round }}</td>
+        {% for cell in row.cells %}
+        <td class="{{ 'marked' if game.names[loop.index0] == current }}
+                   {{ 'struck' if cell.struck }} {{ 'wiped' if cell.reset }}">
+          {%- if cell.value is none -%}
+            <span class="empty">·</span>
+          {%- elif cell.reset -%}
+            0<small>vynulováno</small>
+          {%- else -%}
+            {{ cell.value|cislo }}
+          {%- endif -%}
+        </td>
+        {% endfor %}
+      </tr>
+      {% else %}
+      <tr>
+        <td class="label">1</td>
+        {% for name in game.names %}
+        <td class="{{ 'marked' if name == current }}"><span class="empty">·</span></td>
+        {% endfor %}
+      </tr>
+      {% endfor %}
+
+      {% if hidden %}
+      <tr class="more">
+        <td class="label" colspan="{{ game.names|length + 1 }}">… a dalších {{ hidden|kola }}</td>
+      </tr>
+      {% endif %}
+    </tbody>
+  </table>
+</div>

templates/base.html

@@ -0,0 +1,12 @@
+<!doctype html>
+<html lang="cs">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>{% block title %}Kostky{% endblock %}</title>
+  <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
+</head>
+<body>
+{% block body %}{% endblock %}
+</body>
+</html>

templates/board.html

@@ -0,0 +1,41 @@
+{% extends "base.html" %}
+{% block title %}Zápisník — hra {{ game_id }}{% endblock %}
+
+{% block body %}
+<div class="board">
+  <header class="masthead">
+    <div id="head" data-address="{{ primary_ip }}">{% include "_head.html" %}</div>
+    {% include "_join.html" %}
+  </header>
+
+  <div id="sheet">{% include "_sheet.html" %}</div>
+</div>
+
+<script>
+  // Tabule se doptává serveru; není co udržovat na klientovi.
+  const url = "{{ url_for('board_panel', game_id=game_id) }}";
+
+  setInterval(async () => {
+    try {
+      const response = await fetch(url, { cache: "no-store" });
+      if (!response.ok) return;
+
+      const fresh = new DOMParser().parseFromString(await response.text(), "text/html");
+
+      // Notebook se přesunul na jinou síť — adresa v QR kódu už neplatí.
+      const head = fresh.getElementById("head");
+      if (head && head.dataset.address !== document.getElementById("head").dataset.address) {
+        location.reload();
+        return;
+      }
+
+      for (const id of ["head", "sheet"]) {
+        const updated = fresh.getElementById(id);
+        if (updated) document.getElementById(id).replaceWith(updated);
+      }
+    } catch (error) {
+      // Server je pryč — zkusíme to za dvě vteřiny znovu.
+    }
+  }, 2000);
+</script>
+{% endblock %}

templates/board_idle.html

@@ -0,0 +1,11 @@
+{% extends "base.html" %}
+{% block title %}Zápisník{% endblock %}
+
+{% block body %}
+<div class="board idle">
+  <p class="eyebrow">Zápisník</p>
+  <h1>Zatím se nehraje</h1>
+  <p class="hint">Naskenuj kód telefonem a založ hru.</p>
+  {% include "_join.html" %}
+</div>
+{% endblock %}

templates/game.html

@@ -0,0 +1,79 @@
+{% extends "base.html" %}
+{% block title %}{% if winner %}Konec hry{% else %}Na tahu {{ game.current_player }}{% endif %}{% endblock %}
+
+{% block body %}
+<div class="phone">
+  <header class="masthead">
+    <div>
+      <p class="eyebrow">Hra {{ game_id }}</p>
+      <h1>Kostky</h1>
+    </div>
+    <p class="meta">do {{ game.final_score|cislo }} · kolo {{ game.round_number }}</p>
+  </header>
+
+  {% if chyba %}
+  <p class="error">{{ chyba }}</p>
+  {% endif %}
+
+  {% if winner %}
+  <div class="win">
+    <p class="eyebrow">Konec hry</p>
+    <h2>{{ winner }}</h2>
+    <p>Vyhrává s {{ totals[winner]|cislo }} body z cílových {{ game.final_score|cislo }}.</p>
+  </div>
+  {% else %}
+  <div class="turn">
+    <p class="eyebrow">Na tahu</p>
+    <h2>{{ game.current_player }}</h2>
+    <p class="progress">
+      <strong>{{ totals[game.current_player]|cislo }}</strong> / {{ game.final_score|cislo }}
+      {%- if streaks[game.current_player] %}
+      <span class="ticks">{{ '✕' * streaks[game.current_player] }}</span>
+      {%- endif %}
+    </p>
+    {% if streaks[game.current_player] == 2 %}
+    <p class="warning">Ještě jedna nula a skóre jde pryč.</p>
+    {% endif %}
+
+    <form method="post" action="{{ url_for('add_turn', game_id=game_id) }}" style="margin-top: 1.2rem">
+      <div class="field">
+        <label for="value">Skóre za tah</label>
+        <input type="number" name="value" id="value" inputmode="numeric" autofocus required>
+      </div>
+      <button class="btn" type="submit">Zapsat</button>
+    </form>
+  </div>
+  {% endif %}
+
+  <p class="eyebrow">Průběžné pořadí</p>
+  <table class="standings">
+    {% for rank, name, total in standings %}
+    <tr>
+      <td class="rank">{{ rank }}.</td>
+      <td class="self">{{ name }}</td>
+      <td>
+        {{ total|cislo }}
+        {%- if streaks[name] %} <span class="ticks">{{ '✕' * streaks[name] }}</span>{% endif %}
+      </td>
+    </tr>
+    {% endfor %}
+  </table>
+
+  <div class="actions">
+    <form method="post" action="{{ url_for('undo', game_id=game_id) }}">
+      <button class="btn-quiet" type="submit" {{ 'disabled' if not game.turns }}>Vrátit poslední zápis</button>
+    </form>
+    {% if not winner %}
+    <form method="post" action="{{ url_for('abandon', game_id=game_id) }}">
+      <button class="btn-quiet btn-danger" type="submit">Ukončit hru</button>
+    </form>
+    {% endif %}
+  </div>
+
+  <p class="footer">
+    <a href="{{ url_for('board', game_id=game_id) }}">Zápisník</a>
+    <a href="{{ url_for('hall') }}">Síň slávy</a>
+    <a href="{{ url_for('index') }}">Nová hra</a>
+  </p>
+</div>
+{% endblock %}

templates/index.html

@@ -0,0 +1,112 @@
+{% extends "base.html" %}
+{% block title %}Nová hra{% endblock %}
+
+{% block body %}
+<div class="phone">
+  <header class="masthead">
+    <div>
+      <p class="eyebrow">Počitadlo</p>
+      <h1>Kostky</h1>
+    </div>
+  </header>
+
+  {% if request.args.get('chyba') %}
+  <p class="error">{{ request.args.get('chyba') }}</p>
+  {% endif %}
+
+  {% if running %}
+  <div class="notice">
+    <span>Rozehraná hra {{ running }} čeká.</span>
+    <a href="{{ url_for('game_view', game_id=running) }}">Pokračovat</a>
+  </div>
+  {% endif %}
+
+  <form method="post" action="{{ url_for('new_game') }}">
+    <p class="eyebrow">Kdo hraje</p>
+    <p class="hint">Ťukej jména v pořadí, jak sedíte kolem stolu.</p>
+
+    <div class="chips" id="chips">
+      {% for player in players %}
+      <button type="button" class="chip" aria-pressed="false" data-name="{{ player.name }}">
+        {{ player.name }}<span class="seat"></span>
+      </button>
+      {% endfor %}
+    </div>
+
+    <div class="add-player">
+      <input type="text" id="new-name" placeholder="Nový hráč" autocomplete="off">
+      <button type="button" id="add">Přidat</button>
+    </div>
+
+    <div class="field" style="margin-top: 1.5rem">
+      <label for="final">Cílové skóre</label>
+      <input type="number" name="final_score" id="final" value="{{ final_score }}" inputmode="numeric">
+    </div>
+
+    <div id="chosen"></div>
+    <button class="btn" type="submit">Začít hru</button>
+  </form>
+
+  <p class="footer">
+    <a href="{{ url_for('board_redirect') }}">Zápisník</a>
+    <a href="{{ url_for('hall') }}">Síň slávy</a>
+  </p>
+</div>
+
+<script>
+  const chips = document.getElementById("chips");
+  const chosen = [];
+
+  function render() {
+    for (const chip of chips.querySelectorAll(".chip")) {
+      const seat = chosen.indexOf(chip.dataset.name);
+      chip.setAttribute("aria-pressed", seat > -1);
+      chip.querySelector(".seat").textContent = seat > -1 ? seat + 1 : "";
+    }
+
+    // Pořadí odeslaných polí je pořadí u stolu.
+    document.getElementById("chosen").replaceChildren(...chosen.map(name => {
+      const field = document.createElement("input");
+      field.type = "hidden";
+      field.name = "player";
+      field.value = name;
+      return field;
+    }));
+  }
+
+  chips.addEventListener("click", event => {
+    const chip = event.target.closest(".chip");
+    if (!chip) return;
+
+    const seat = chosen.indexOf(chip.dataset.name);
+    if (seat > -1) chosen.splice(seat, 1);
+    else chosen.push(chip.dataset.name);
+    render();
+  });
+
+  const field = document.getElementById("new-name");
+
+  function addPlayer() {
+    const name = field.value.trim();
+    if (!name) return;
+
+    if (!chips.querySelector(`[data-name="${CSS.escape(name)}"]`)) {
+      const chip = document.createElement("button");
+      chip.type = "button";
+      chip.className = "chip";
+      chip.dataset.name = name;
+      chip.append(name, Object.assign(document.createElement("span"), { className: "seat" }));
+      chips.append(chip);
+    }
+
+    if (!chosen.includes(name)) chosen.push(name);
+    field.value = "";
+    render();
+  }
+
+  document.getElementById("add").addEventListener("click", addPlayer);
+  field.addEventListener("keydown", event => {
+    if (event.key === "Enter") { event.preventDefault(); addPlayer(); }
+  });
+</script>
+{% endblock %}

templates/stats.html

@@ -0,0 +1,112 @@
+{% extends "base.html" %}
+{% block title %}Síň slávy{% endblock %}
+
+{% block body %}
+<div class="board">
+  <header class="masthead">
+    <div>
+      <p class="eyebrow">Počitadlo</p>
+      <h1>Síň slávy</h1>
+    </div>
+    <p class="meta"><a href="{{ url_for('index') }}">Nová hra</a></p>
+  </header>
+
+  {% if records.best_turn %}
+  <div class="records">
+    <article class="record">
+      <p class="eyebrow">Nejvyšší tah</p>
+      <p class="number">{{ records.best_turn.value|cislo }}</p>
+      <p class="who">{{ records.best_turn.name }} · hra {{ records.best_turn.game_id }}
+        · {{ records.best_turn.at|datum }}</p>
+    </article>
+
+    {% if records.best_score %}
+    <article class="record">
+      <p class="eyebrow">Nejvyšší konečné skóre</p>
+      <p class="number">{{ records.best_score.total|cislo }}</p>
+      <p class="who">{{ records.best_score.name }} · hra {{ records.best_score.game_id }}
+        · {{ records.best_score.finished_at|datum }}</p>
+    </article>
+    {% endif %}
+
+    {% if records.fastest %}
+    <article class="record">
+      <p class="eyebrow">Nejrychlejší výhra</p>
+      <p class="number">{{ records.fastest.rounds }}<small> kol</small></p>
+      <p class="who">{{ records.fastest.name }} · hra {{ records.fastest.game_id }}
+        · {{ records.fastest.finished_at|datum }}</p>
+    </article>
+    {% endif %}
+  </div>
+  {% else %}
+  <p class="hint">Zatím se neodehrál ani jeden tah. Rekordy přibudou po první hře.</p>
+  {% endif %}
+
+  {% if careers %}
+  <p class="eyebrow">Kariéra</p>
+  <p class="hint">Počítají se jen dohrané hry.</p>
+  <div class="sheet-wrap">
+    <table class="sheet">
+      <thead>
+        <tr>
+          <th class="label">Hráč</th>
+          <th>Her</th>
+          <th>Výher</th>
+          <th>Úspěšnost</th>
+          <th>Průměrné pořadí</th>
+          <th>Průměr na tah</th>
+          <th>Vynulování</th>
+        </tr>
+      </thead>
+      <tbody>
+        {% for player in careers %}
+        <tr>
+          <td class="label name">{{ player.name }}</td>
+          <td>{{ player.games }}</td>
+          <td>{{ player.wins }}</td>
+          <td>{{ (player.share * 100)|round|int }} %</td>
+          <td>{{ '%.1f'|format(player.placing) }}</td>
+          <td>{{ player.per_turn|round|int|cislo }}</td>
+          <td class="{{ 'wiped' if player.wipeouts }}">{{ player.wipeouts }}</td>
+        </tr>
+        {% endfor %}
+      </tbody>
+    </table>
+  </div>
+  {% endif %}
+
+  {% if games %}
+  <p class="eyebrow" style="margin-top: 2.5rem">Odehrané hry</p>
+  <div class="sheet-wrap">
+    <table class="sheet">
+      <thead>
+        <tr>
+          <th class="label">Hra</th>
+          <th class="label">Datum</th>
+          <th>Hráčů</th>
+          <th>Kol</th>
+          <th>Cíl</th>
+          <th class="label">Výsledek</th>
+        </tr>
+      </thead>
+      <tbody>
+        {% for game in games %}
+        <tr>
+          <td class="label">{{ game.id }}</td>
+          <td class="label">{{ game.started_at|datum }}</td>
+          <td>{{ game.players }}</td>
+          <td>{{ (game.turns / game.players)|round(0, 'ceil')|int }}</td>
+          <td>{{ game.final_score|cislo }}</td>
+          <td class="label name">
+            {%- if game.winner_name %}Vyhrává {{ game.winner_name }}
+            {%- elif game.status == 'probíhá' %}<a href="{{ url_for('game_view', game_id=game.id) }}">Pokračovat</a>
+            {%- else %}{{ game.status }}{% endif -%}
+          </td>
+        </tr>
+        {% endfor %}
+      </tbody>
+    </table>
+  </div>
+  {% endif %}
+</div>
+{% endblock %}

tests/test_core.py

@@ -0,0 +1,174 @@
+import pytest
+
+from core import Game, GameOver
+
+
+def play(game: Game, *values: int) -> Game:
+    """Odehraje tahy po sobě, jak by je zadával zapisovatel."""
+    for value in values:
+        game.add_score(value)
+    return game
+
+
+def test_tri_nuly_vynuluji_skore():
+    game = Game(["A", "B"], final_score=1000)
+    play(game, 200, 10, 0, 10, 0, 10)
+
+    assert game.totals()["A"] == 200
+
+    result = game.add_score(0)
+
+    assert result.was_reset
+    assert game.totals()["A"] == 0
+
+
+def test_nenulovy_tah_prerusi_serii():
+    game = Game(["A", "B"], final_score=1000)
+    play(game, 0, 10, 0, 10, 50, 10)
+
+    result = game.add_score(0)
+
+    assert not result.was_reset
+    assert game.totals()["A"] == 50
+
+
+def test_po_vynulovani_zacina_serie_znovu():
+    game = Game(["A"], final_score=1000)
+    play(game, 100, 0, 0, 0)
+
+    assert game.totals()["A"] == 0
+
+    # Další dvě nuly ještě vynulovat nesmí — série se počítá od resetu.
+    assert not game.add_score(0).was_reset
+    assert not game.add_score(0).was_reset
+    assert game.add_score(0).was_reset
+
+
+def test_vynulovani_se_neuklada_jako_zaporny_tah():
+    game = Game(["A"], final_score=1000)
+    play(game, 300, 0, 0, 0)
+
+    assert [t.value for t in game.turns] == [300, 0, 0, 0]
+    assert [t.reset for t in game.turns] == [False, False, False, True]
+
+
+def test_remiza_na_prvnim_miste_hru_nekonci():
+    game = Game(["A", "B"], final_score=1000)
+    play(game, 1000, 1000)
+
+    assert game.round_complete
+    assert game.check_win() == ""
+    assert not game.finished
+
+
+def test_vitez_az_po_dokoncenem_kole():
+    game = Game(["A", "B"], final_score=1000)
+    game.add_score(1000)
+
+    # A je přes limit, ale B ještě nehrál.
+    assert game.totals()["A"] == 1000
+    assert game.winner == ""
+
+    result = game.add_score(10)
+
+    assert result.winner == "A"
+    assert game.finished
+
+
+def test_do_dohrane_hry_uz_nejde_zapsat():
+    game = Game(["A", "B"], final_score=1000)
+    play(game, 1000, 10)
+
+    with pytest.raises(GameOver):
+        game.add_score(50)
+
+
+def test_undo_vrati_skore_i_hrace_na_tahu():
+    game = Game(["A", "B"], final_score=1000)
+    play(game, 100, 50)
+
+    assert game.current_player == "A"
+
+    game.add_score(70)
+
+    assert game.current_player == "B"
+    assert game.totals()["A"] == 170
+
+    game.undo()
+
+    assert game.current_player == "A"
+    assert game.totals()["A"] == 100
+
+
+def test_undo_pres_vynulovani_obnovi_puvodni_skore():
+    game = Game(["A"], final_score=1000)
+    play(game, 400, 0, 0, 0)
+
+    assert game.totals()["A"] == 0
+
+    game.undo()
+
+    assert game.totals()["A"] == 400
+    assert game.zero_streak("A") == 2
+
+
+def test_undo_na_prazdne_hre():
+    game = Game(["A"])
+
+    assert game.undo() is None
+
+
+def test_zero_streak():
+    game = Game(["A"], final_score=1000)
+
+    assert game.zero_streak("A") == 0
+
+    game.add_score(0)
+    assert game.zero_streak("A") == 1
+
+    game.add_score(0)
+    assert game.zero_streak("A") == 2
+
+    game.add_score(0)
+    assert game.zero_streak("A") == 0
+
+
+def test_poradi_hracu_se_toci_dokola():
+    game = Game(["A", "B", "C"])
+
+    assert [game.current_player for _ in range(1)] == ["A"]
+    assert game.round_number == 1
+
+    play(game, 10, 10, 10)
+
+    assert game.current_player == "A"
+    assert game.round_number == 2
+
+
+def test_standings_radi_od_nejlepsiho():
+    game = Game(["A", "B", "C"])
+    play(game, 10, 300, 50)
+
+    assert game.standings() == [(1, "B", 300), (2, "C", 50), (3, "A", 10)]
+
+
+def test_rounds_dela_zapisnik_po_kolech():
+    game = Game(["A", "B"])
+    play(game, 10, 20, 30)
+
+    rounds = game.rounds()
+
+    assert len(rounds) == 2
+    assert rounds[0][0] == 1
+    assert rounds[0][1]["A"].value == 10
+    assert rounds[0][1]["B"].value == 20
+    assert rounds[1][1]["A"].value == 30
+    assert rounds[1][1]["B"] is None
+
+
+def test_hra_potrebuje_hrace():
+    with pytest.raises(ValueError):
+        Game([])
+
+    with pytest.raises(ValueError):
+        Game(["A", "A"])

tests/test_net.py

@@ -0,0 +1,92 @@
+import pytest
+
+import net
+
+
+@pytest.mark.parametrize("ip, interface, expected", [
+    ("127.0.0.1", "lo", None),              # loopback
+    ("169.254.3.7", "wlp44s0", None),       # link-local, adresa bez DHCP
+    ("0.0.0.0", "eth0", None),
+    ("nesmysl", "eth0", None),
+    ("192.168.1.20", "wlp44s0", "lan"),
+    ("10.186.234.182", "wlp44s0", "lan"),   # hotspot z telefonu
+    ("172.20.10.3", "en0", "lan"),          # hotspot z iPhonu
+    ("100.91.0.24", "tailscale0", "tailnet"),
+    ("172.17.0.1", "docker0", "virtual"),
+    ("192.168.122.1", "virbr0", "virtual"),
+    ("10.0.0.5", "br-2f1a798d", "virtual"),
+    ("93.184.216.34", "eth0", "public"),
+])
+def test_klasifikace_podle_rozsahu(ip, interface, expected):
+    assert net.classify(ip, interface) == expected
+
+
+def test_tailnet_pozna_i_jine_rozhrani():
+    """Rozhoduje rozsah adresy, ne jméno rozhraní."""
+    assert net.classify("100.64.0.1", "eth0") == "tailnet"
+    assert net.classify("100.127.255.254", "") == "tailnet"
+    assert net.classify("100.128.0.1", "eth0") == "public"   # už mimo rozsah
+
+
+def test_poradi_adres():
+    found = [
+        ("docker0", "172.17.0.1"),
+        ("tailscale0", "100.91.0.24"),
+        ("lo", "127.0.0.1"),
+        ("wlp44s0", "10.186.234.182"),
+        ("eth0", "192.168.1.20"),
+    ]
+
+    ranked = net.rank(found, primary="10.186.234.182")
+
+    assert [a.ip for a in ranked] == [
+        "10.186.234.182",   # výchozí trasa
+        "192.168.1.20",     # ostatní místní sítě
+        "100.91.0.24",      # tailnet funguje i napříč sítěmi
+        "172.17.0.1",       # virtuální až nakonec
+    ]
+    assert ranked[0].primary
+    assert not ranked[1].primary
+
+
+def test_bez_vychozi_trasy_se_poradi_drzi_typu():
+    found = [("docker0", "172.17.0.1"), ("wlp44s0", "192.168.1.20")]
+
+    ranked = net.rank(found, primary=None)
+
+    assert [a.ip for a in ranked] == ["192.168.1.20", "172.17.0.1"]
+    assert not any(a.primary for a in ranked)
+
+
+def test_duplicity_se_slucuji():
+    found = [("wlp44s0", "10.0.0.5"), ("", "10.0.0.5")]
+
+    assert len(net.rank(found, primary="10.0.0.5")) == 1
+
+
+def test_zadna_pouzitelna_adresa():
+    assert net.rank([("lo", "127.0.0.1")], primary=None) == []
+
+
+def test_dice_host_ma_posledni_slovo(monkeypatch):
+    monkeypatch.setenv("DICE_HOST", "192.168.5.5")
+
+    found = net.addresses()
+
+    assert [a.ip for a in found] == ["192.168.5.5"]
+    assert found[0].primary
+
+
+def test_url_a_popisek():
+    address = net.Address(ip="10.0.0.5", interface="wlp44s0", kind="tailnet")
+
+    assert address.url(8000) == "http://10.0.0.5:8000"
+    assert address.label == "přes Tailscale"
+
+
+def test_v_systemu_se_neco_najde():
+    """Na stroji s libovolnou sítí musí vyjít aspoň jedna adresa."""
+    found = net.addresses()
+
+    assert all(net.classify(a.ip, a.interface) for a in found)
+    assert len({a.ip for a in found}) == len(found)

tests/test_stats.py

@@ -0,0 +1,100 @@
+import pytest
+
+import stats
+import storage
+
+
+@pytest.fixture
+def conn(tmp_path):
+    connection = storage.connect(tmp_path / "test.db")
+    yield connection
+    connection.close()
+
+
+def play(conn, names, final_score, values, finish=True):
+    game_id = storage.create_game(conn, names, final_score)
+    game = storage.load_game(conn, game_id)
+    for value in values:
+        storage.add_turn(conn, game_id, game.add_score(value).turn)
+    if finish and game.winner:
+        storage.finish_game(conn, game_id, game.winner)
+    return game_id
+
+
+def by_name(table):
+    return {row["name"]: row for row in table}
+
+
+def test_prazdna_sin_slavy(conn):
+    found = stats.records(conn)
+
+    assert found["best_turn"] is None
+    assert found["best_score"] is None
+    assert found["fastest"] is None
+    assert stats.careers(conn) == []
+
+
+def test_rekordy(conn):
+    play(conn, ["Adam", "Eva"], 1000, [600, 200, 500, 100])
+
+    found = stats.records(conn)
+
+    assert found["best_turn"]["name"] == "Adam"
+    assert found["best_turn"]["value"] == 600
+    assert found["best_score"]["name"] == "Adam"
+    assert found["best_score"]["total"] == 1100
+    assert found["fastest"]["name"] == "Adam"
+    assert found["fastest"]["rounds"] == 2
+
+
+def test_kariera_pocita_vyhry_a_uspesnost(conn):
+    play(conn, ["Adam", "Eva"], 1000, [600, 200, 500, 100])
+    play(conn, ["Adam", "Eva"], 1000, [100, 600, 200, 500])
+
+    table = by_name(stats.careers(conn))
+
+    assert table["Adam"]["games"] == 2
+    assert table["Adam"]["wins"] == 1
+    assert table["Adam"]["share"] == 0.5
+    assert table["Eva"]["wins"] == 1
+
+
+def test_nedohrane_hry_se_nepocitaji(conn):
+    play(conn, ["Adam", "Eva"], 1000, [600, 200, 500, 100])
+    play(conn, ["Adam", "Eva"], 5000, [100, 100], finish=False)
+
+    table = by_name(stats.careers(conn))
+
+    assert table["Adam"]["games"] == 1
+
+
+def test_vynulovani_se_pocita(conn):
+    # Eva vyhraje, Adam se cestou třikrát vynuluje.
+    play(conn, ["Adam", "Eva"], 1000, [300, 400, 0, 300, 0, 200, 0, 500])
+
+    table = by_name(stats.careers(conn))
+
+    assert table["Adam"]["wipeouts"] == 1
+    assert table["Eva"]["wipeouts"] == 0
+
+
+def test_prumerne_poradi(conn):
+    play(conn, ["Adam", "Eva", "Petr"], 1000, [600, 300, 100, 500, 200, 50])
+
+    table = by_name(stats.careers(conn))
+
+    assert table["Adam"]["placing"] == 1
+    assert table["Eva"]["placing"] == 2
+    assert table["Petr"]["placing"] == 3
+
+
+def test_soucty_v_sql_respektuji_vynulovani(conn):
+    """SQL musí počítat celkové skóre stejně jako core.Game.totals()."""
+    game_id = play(conn, ["Adam", "Eva"], 1000, [300, 100, 0, 100, 0, 100, 0, 900])
+
+    game = storage.load_game(conn, game_id)
+    best = stats.records(conn)["best_score"]
+
+    assert game.totals()["Adam"] == 0
+    assert best["name"] == "Eva"
+    assert best["total"] == game.totals()["Eva"]

tests/test_storage.py

@@ -0,0 +1,134 @@
+import pytest
+
+import storage
+
+
+@pytest.fixture
+def conn(tmp_path):
+    connection = storage.connect(tmp_path / "test.db")
+    yield connection
+    connection.close()
+
+
+def test_stejne_jmeno_je_stejny_hrac(conn):
+    """Arkádová identita: Adam z jedné hry je Adam i v další."""
+    first = storage.create_game(conn, ["Adam", "Eva"])
+    second = storage.create_game(conn, ["adam", "Petr"])
+
+    adam_first = [p["id"] for p in storage.seating(conn, first) if p["name"] == "Adam"]
+    adam_second = [p["id"] for p in storage.seating(conn, second)][0]
+
+    assert adam_first[0] == adam_second
+
+
+def test_normalizace_jmen():
+    assert storage.normalize("  Adam ") == storage.normalize("adam")
+    assert storage.normalize("Jan  Novák") == storage.normalize("jan novák")
+    assert storage.normalize("Adam") != storage.normalize("Ádám")
+
+
+def test_prejmenovani_se_propise_do_starych_her(conn):
+    game_id = storage.create_game(conn, ["Adam", "Eva"])
+    adam = storage.seating(conn, game_id)[0]["id"]
+
+    storage.rename_player(conn, adam, "Adam Š.")
+
+    assert [p["name"] for p in storage.seating(conn, game_id)] == ["Adam Š.", "Eva"]
+
+
+def test_slouceni_hracu_po_preklepu(conn):
+    good = storage.create_game(conn, ["Adam", "Eva"])
+    typo = storage.create_game(conn, ["Adm", "Eva"])
+
+    adam = storage.get_or_create_player(conn, "Adam")
+    adm = storage.get_or_create_player(conn, "Adm")
+
+    game = storage.load_game(conn, typo)
+    storage.add_turn(conn, typo, game.add_score(150).turn)
+
+    storage.merge_players(conn, adm, adam)
+
+    assert [p["name"] for p in storage.seating(conn, typo)] == ["Adam", "Eva"]
+    assert storage.load_game(conn, typo).totals()["Adam"] == 150
+    assert [p["id"] for p in storage.known_players(conn)].count(adm) == 0
+    assert storage.load_game(conn, good).totals() == {"Adam": 0, "Eva": 0}
+
+
+def test_hra_se_nacte_zpatky_i_s_tahy(conn):
+    game_id = storage.create_game(conn, ["Adam", "Eva"], final_score=500)
+    game = storage.load_game(conn, game_id)
+
+    for value in (100, 50, 0, 30):
+        storage.add_turn(conn, game_id, game.add_score(value).turn)
+
+    loaded = storage.load_game(conn, game_id)
+
+    assert loaded.names == ["Adam", "Eva"]
+    assert loaded.final_score == 500
+    assert loaded.totals() == {"Adam": 100, "Eva": 80}
+    assert loaded.current_player == "Adam"
+    assert loaded.round_number == 3
+
+
+def test_vynulovani_se_uklada_jako_nula_s_priznakem(conn):
+    game_id = storage.create_game(conn, ["Adam"], final_score=500)
+    game = storage.load_game(conn, game_id)
+
+    for value in (300, 0, 0, 0):
+        storage.add_turn(conn, game_id, game.add_score(value).turn)
+
+    rows = conn.execute("SELECT value, reset FROM turns ORDER BY id").fetchall()
+
+    assert [r["value"] for r in rows] == [300, 0, 0, 0]
+    assert [r["reset"] for r in rows] == [0, 0, 0, 1]
+    assert storage.load_game(conn, game_id).totals()["Adam"] == 0
+
+
+def test_rozehrana_hra_se_najde_a_dokonci(conn):
+    game_id = storage.create_game(conn, ["Adam", "Eva"], final_score=100)
+
+    assert storage.running_game(conn) == game_id
+
+    game = storage.load_game(conn, game_id)
+    storage.add_turn(conn, game_id, game.add_score(100).turn)
+    result = game.add_score(10)
+    storage.add_turn(conn, game_id, result.turn)
+    storage.finish_game(conn, game_id, result.winner)
+
+    assert storage.running_game(conn) is None
+    assert storage.game_row(conn, game_id)["status"] == storage.STATUS_FINISHED
+    assert storage.game_row(conn, game_id)["winner_name"] == "Adam"
+
+
+def test_undo_smaze_tah_a_vrati_hru_do_hry(conn):
+    game_id = storage.create_game(conn, ["Adam", "Eva"], final_score=100)
+    game = storage.load_game(conn, game_id)
+    storage.add_turn(conn, game_id, game.add_score(100).turn)
+    result = game.add_score(10)
+    storage.add_turn(conn, game_id, result.turn)
+    storage.finish_game(conn, game_id, result.winner)
+
+    assert storage.undo_turn(conn, game_id)
+
+    row = storage.game_row(conn, game_id)
+    assert row["status"] == storage.STATUS_RUNNING
+    assert row["winner_id"] is None
+    assert storage.load_game(conn, game_id).current_player == "Eva"
+
+
+def test_opustena_hra(conn):
+    game_id = storage.create_game(conn, ["Adam", "Eva"])
+    storage.abandon_game(conn, game_id)
+
+    assert storage.running_game(conn) is None
+    assert storage.game_row(conn, game_id)["status"] == storage.STATUS_ABANDONED
+
+
+def test_hrac_nesmi_sedet_u_stolu_dvakrat(conn):
+    with pytest.raises(ValueError):
+        storage.create_game(conn, ["Adam", "adam"])
+
+
+def test_prazdne_jmeno(conn):
+    with pytest.raises(ValueError):
+        storage.get_or_create_player(conn, "   ")

tests/test_web.py

@@ -0,0 +1,238 @@
+import pytest
+
+import storage
+import web
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    monkeypatch.setattr(storage, "DB_PATH", tmp_path / "test.db")
+    monkeypatch.setenv("DICE_HOST", "192.168.0.10")
+    web.app.config["TESTING"] = True
+    with web.app.test_client() as client:
+        yield client
+
+
+def start_game(client, *names, final_score=1000):
+    response = client.post("/game", data={"player": list(names),
+                                          "final_score": final_score})
+    assert response.status_code == 302
+    return int(response.headers["Location"].rsplit("/", 1)[1])
+
+
+def score(client, game_id, value):
+    return client.post(f"/game/{game_id}/turn", data={"value": value})
+
+
+def text(response):
+    return response.get_data(as_text=True)
+
+
+def test_prazdne_pocitadlo_nabizi_novou_hru(client):
+    page = text(client.get("/"))
+
+    assert "Kdo hraje" in page
+    assert "Začít hru" in page
+
+
+def test_zalozeni_hry_a_zapis_tahu(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    page = text(client.get(f"/game/{game_id}"))
+    assert "Na tahu" in page
+    assert "Adam" in page
+
+    score(client, game_id, 450)
+
+    page = text(client.get(f"/game/{game_id}"))
+    assert "Eva" in page
+    assert "450" in page
+
+
+def test_znama_jmena_se_nabidnou_v_dalsi_hre(client):
+    start_game(client, "Adam", "Eva")
+
+    page = text(client.get("/"))
+
+    assert 'data-name="Adam"' in page
+    assert 'data-name="Eva"' in page
+
+
+def test_rozehrana_hra_se_nabidne_k_pokracovani(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    page = text(client.get("/"))
+
+    assert "Rozehraná hra" in page
+    assert f"/game/{game_id}" in page
+
+
+def test_neplatne_skore_neprojde(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    response = score(client, game_id, "hodně")
+
+    assert "chyba" in response.headers["Location"]
+    assert "Zadej skóre jako číslo." in text(client.get(response.headers["Location"]))
+
+
+def test_vynulovani_se_v_zapisniku_vyznaci(client):
+    game_id = start_game(client, "Adam")
+    for value in (300, 0, 0, 0):
+        score(client, game_id, value)
+
+    panel = text(client.get(f"/board/{game_id}/panel"))
+
+    assert "vynulováno" in panel
+    assert "struck" in panel        # škrtnutý zápis před vynulováním
+
+
+def test_vraceni_posledniho_zapisu(client):
+    game_id = start_game(client, "Adam", "Eva")
+    score(client, game_id, 450)
+    score(client, game_id, 200)
+
+    client.post(f"/game/{game_id}/undo")
+    page = text(client.get(f"/game/{game_id}"))
+
+    assert "Eva" in page
+    assert "200" not in page
+
+
+def test_varovani_pred_treti_nulou(client):
+    game_id = start_game(client, "Adam")
+    score(client, game_id, 300)
+    score(client, game_id, 0)
+    score(client, game_id, 0)
+
+    assert "Ještě jedna nula" in text(client.get(f"/game/{game_id}"))
+
+
+def test_dohrani_hry_vyhlasi_viteze(client):
+    game_id = start_game(client, "Adam", "Eva", final_score=500)
+    score(client, game_id, 500)
+    score(client, game_id, 100)
+
+    page = text(client.get(f"/game/{game_id}"))
+    assert "Vyhrává" in page
+    assert "Konec hry" in page
+
+    assert storage.running_game(storage.connect(storage.DB_PATH)) is None
+
+
+def test_do_dohrane_hry_uz_nejde_zapsat(client):
+    game_id = start_game(client, "Adam", "Eva", final_score=500)
+    score(client, game_id, 500)
+    score(client, game_id, 100)
+
+    score(client, game_id, 999)
+
+    conn = storage.connect(storage.DB_PATH)
+    assert storage.load_game(conn, game_id).totals()["Adam"] == 500
+
+
+def test_remiza_hru_neukonci(client):
+    game_id = start_game(client, "Adam", "Eva", final_score=500)
+    score(client, game_id, 500)
+    score(client, game_id, 500)
+
+    page = text(client.get(f"/game/{game_id}"))
+
+    assert "Na tahu" in page
+    assert "Konec hry" not in page
+
+
+def test_ukonceni_hry(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    client.post(f"/game/{game_id}/abandon")
+
+    assert "Rozehraná hra" not in text(client.get("/"))
+
+
+def test_tabule_ukazuje_qr_a_adresu(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    page = text(client.get(f"/board/{game_id}"))
+
+    assert "<svg class=\"qr\"" in page
+    assert "http://192.168.0.10:8000" in page
+
+
+def test_tabule_bez_hry(client):
+    page = text(client.get("/board"))
+
+    assert "Zatím se nehraje" in page
+
+
+def test_tabule_presmeruje_na_rozehranou_hru(client):
+    game_id = start_game(client, "Adam", "Eva")
+
+    response = client.get("/board")
+
+    assert response.headers["Location"].endswith(f"/board/{game_id}")
+
+
+def test_neexistujici_hra(client):
+    assert client.get("/game/999").status_code == 404
+
+
+def test_sin_slavy(client):
+    game_id = start_game(client, "Adam", "Eva", final_score=500)
+    score(client, game_id, 500)
+    score(client, game_id, 100)
+
+    page = text(client.get("/stats"))
+
+    assert "Nejvyšší tah" in page
+    assert "Kariéra" in page
+    assert "Vyhrává Adam" in page
+
+
+def test_sin_slavy_bez_her(client):
+    assert "Rekordy přibudou po první hře" in text(client.get("/stats"))
+
+
+def test_zapisnik_zacina_nejnovejsim_kolem(client):
+    game_id = start_game(client, "Adam", final_score=99999)
+    for value in (111, 222, 333):
+        score(client, game_id, value)
+
+    panel = text(client.get(f"/board/{game_id}/panel"))
+
+    assert panel.index("333") < panel.index("222") < panel.index("111")
+
+
+def test_soucty_jsou_nad_koly(client):
+    game_id = start_game(client, "Adam", final_score=99999)
+    score(client, game_id, 450)
+
+    panel = text(client.get(f"/board/{game_id}/panel"))
+
+    assert panel.index("Celkem") < panel.index(">450<")
+
+
+def test_tabule_useka_starou_historii(client):
+    game_id = start_game(client, "Adam", final_score=999999)
+    for value in range(1, 31):
+        score(client, game_id, value * 10)
+
+    panel = text(client.get(f"/board/{game_id}/panel"))
+
+    assert "a dalších 15 kol" in panel
+    assert "300" in panel        # nejnovější kolo tam je
+    assert ">150<" not in panel  # patnácté odspodu už ne
+
+
+def test_kratka_hra_nic_neuseka(client):
+    game_id = start_game(client, "Adam", final_score=99999)
+    score(client, game_id, 100)
+
+    assert "a dalších" not in text(client.get(f"/board/{game_id}/panel"))
+
+
+@pytest.mark.parametrize("count, expected", [
+    (1, "1 kolo"), (2, "2 kola"), (4, "4 kola"), (5, "5 kol"), (22, "22 kol"),
+])
+def test_sklonovani_kol(count, expected):
+    assert web.kola(count) == expected

web.py

@@ -0,0 +1,301 @@
+# /// script
+# requires-python = ">=3.11"
+# dependencies = ["flask", "qrcode"]
+# ///
+"""Webové počitadlo pro domácí síť.
+
+Telefon zapisuje skóre (`/game/<id>`), notebook ukazuje zápisník (`/board`).
+Server-rendered HTML, formuláře přes POST/redirect/GET, žádný build step.
+"""
+
+import os
+import socket
+
+import qrcode
+from flask import (Flask, abort, g, redirect, render_template, request,
+                   url_for)
+from markupsafe import Markup
+
+import net
+import stats
+import storage
+from core import FINAL_SCORE, Game, GameOver
+
+app = Flask(__name__)
+
+PORT = int(os.environ.get("DICE_PORT", 8000))
+
+# Kolik kol tabule ukáže. Zbytek historie je na hráčích, ne na tabuli —
+# ta má ukazovat stav, ne archiv.
+BOARD_ROUNDS = 15
+
+
+# --- připojení k databázi ---------------------------------------------------
+
+def db():
+    if "db" not in g:
+        g.db = storage.connect()
+    return g.db
+
+
+@app.teardown_appcontext
+def close_db(_exception):
+    conn = g.pop("db", None)
+    if conn is not None:
+        conn.close()
+
+
+# --- adresa a QR kód --------------------------------------------------------
+
+def primary_ip() -> str:
+    """Adresa, na kterou tabule ukazuje. Prázdno, když se nedá zjistit."""
+    found = net.addresses()
+    return found[0].ip if found else ""
+
+
+def links(path: str = "/") -> dict:
+    """Adresy, na kterých je počitadlo dostupné, i s cílem pro QR kód.
+
+    Hledá se při každém načtení — notebook se během večera může přesunout
+    z domácí WiFi na hotspot a zpátky.
+    """
+    found = net.addresses()
+    primary = found[0] if found else None
+
+    return {
+        "primary": primary,
+        "others": found[1:],
+        "port": PORT,
+        "target": primary.url(PORT) + path if primary else "",
+    }
+
+
+def qr_svg(data: str) -> Markup:
+    """QR jako SVG složené ze čtverečků — bez Pillow a bez práce s obrázky."""
+    code = qrcode.QRCode(box_size=1, border=2)
+    code.add_data(data)
+    code.make(fit=True)
+    matrix = code.get_matrix()
+    size = len(matrix)
+
+    rects = [
+        f'<rect x="{x}" y="{y}" width="1" height="1"/>'
+        for y, row in enumerate(matrix)
+        for x, dark in enumerate(row) if dark
+    ]
+
+    return Markup(
+        f'<svg class="qr" viewBox="0 0 {size} {size}" role="img" '
+        f'aria-label="QR kód s adresou pro telefon" '
+        f'shape-rendering="crispEdges">{"".join(rects)}</svg>'
+    )
+
+
+@app.template_filter("datum")
+def datum(value: str) -> str:
+    """Z ISO textu udělá 12. 8. 2026."""
+    if not value:
+        return ""
+    den = value[:10].split("-")
+    return f"{int(den[2])}. {int(den[1])}. {den[0]}"
+
+
+@app.template_filter("qr")
+def qr_filter(data: str) -> Markup:
+    return qr_svg(data) if data else Markup("")
+
+
+@app.template_filter("kola")
+def kola(count: int) -> str:
+    if count == 1:
+        return "1 kolo"
+    if 2 <= count <= 4:
+        return f"{count} kola"
+    return f"{count} kol"
+
+
+@app.template_filter("cislo")
+def cislo(value: int) -> str:
+    """Tisíce se v češtině oddělují mezerou."""
+    return f"{value:,}".replace(",", " ")
+
+
+# --- zápisník ---------------------------------------------------------------
+
+def scoresheet(game: Game) -> tuple[list[dict], int]:
+    """Řádky zápisníku po kolech, od nejnovějšího.
+
+    Naposledy odehrané kolo patří nahoru — po padesáti kolech by jinak bylo
+    to podstatné mimo obrazovku. Vrací i počet kol, která se nevešla.
+
+    Tahy zapsané před posledním vynulováním se přeškrtnou — přesně tak, jak
+    by se škrtaly na papíře.
+    """
+    wiped_in_round = {}
+    for turn in game.turns:
+        if turn.reset:
+            wiped_in_round[turn.player] = turn.round
+
+    rows = []
+    for number, by_player in game.rounds():
+        cells = []
+        for name in game.names:
+            turn = by_player[name]
+            cells.append({
+                "value": None if turn is None else turn.value,
+                "reset": turn is not None and turn.reset,
+                "struck": turn is not None and turn.round < wiped_in_round.get(name, 0),
+            })
+        rows.append({"round": number, "cells": cells})
+
+    rows.reverse()
+    hidden = max(0, len(rows) - BOARD_ROUNDS)
+
+    return rows[:BOARD_ROUNDS], hidden
+
+
+def view(game: Game, game_id: int, row) -> dict:
+    """Společný podklad pro zápisník i pro zadávací pohled."""
+    totals = game.totals()
+    winner = row["winner_name"] if row["status"] == storage.STATUS_FINISHED else ""
+    rows, hidden = scoresheet(game)
+    return {
+        "game": game,
+        "game_id": game_id,
+        "row": row,
+        "totals": totals,
+        "rows": rows,
+        "hidden": hidden,
+        "streaks": {name: game.zero_streak(name) for name in game.names},
+        "standings": game.standings(),
+        "winner": winner,
+        "current": "" if winner else game.current_player,
+        "primary_ip": primary_ip(),
+    }
+
+
+def load(game_id: int) -> tuple[Game, "storage.sqlite3.Row"]:
+    row = storage.game_row(db(), game_id)
+    if row is None:
+        abort(404)
+    return storage.load_game(db(), game_id), row
+
+
+# --- routy ------------------------------------------------------------------
+
+@app.route("/")
+def index():
+    return render_template(
+        "index.html",
+        players=storage.known_players(db()),
+        running=storage.running_game(db()),
+        final_score=FINAL_SCORE,
+    )
+
+
+@app.post("/game")
+def new_game():
+    names = [n for n in request.form.getlist("player") if n.strip()]
+    if not names:
+        return redirect(url_for("index", chyba="Vyber aspoň jednoho hráče."))
+
+    try:
+        final_score = int(request.form.get("final_score") or FINAL_SCORE)
+    except ValueError:
+        return redirect(url_for("index", chyba="Cílové skóre musí být číslo."))
+
+    try:
+        game_id = storage.create_game(db(), names, final_score)
+    except ValueError as exc:
+        return redirect(url_for("index", chyba=str(exc)))
+
+    return redirect(url_for("game_view", game_id=game_id))
+
+
+@app.route("/game/<int:game_id>")
+def game_view(game_id: int):
+    game, row = load(game_id)
+    return render_template("game.html", chyba=request.args.get("chyba", ""),
+                           **view(game, game_id, row))
+
+
+@app.post("/game/<int:game_id>/turn")
+def add_turn(game_id: int):
+    game, row = load(game_id)
+
+    try:
+        value = int(request.form.get("value", ""))
+    except ValueError:
+        return redirect(url_for("game_view", game_id=game_id,
+                                chyba="Zadej skóre jako číslo."))
+
+    try:
+        result = game.add_score(value)
+    except GameOver:
+        return redirect(url_for("game_view", game_id=game_id))
+
+    storage.add_turn(db(), game_id, result.turn)
+    if result.winner:
+        storage.finish_game(db(), game_id, result.winner)
+
+    return redirect(url_for("game_view", game_id=game_id))
+
+
+@app.post("/game/<int:game_id>/undo")
+def undo(game_id: int):
+    storage.undo_turn(db(), game_id)
+    return redirect(url_for("game_view", game_id=game_id))
+
+
+@app.post("/game/<int:game_id>/abandon")
+def abandon(game_id: int):
+    storage.abandon_game(db(), game_id)
+    return redirect(url_for("index"))
+
+
+@app.route("/board")
+def board_redirect():
+    game_id = storage.running_game(db())
+    if game_id:
+        return redirect(url_for("board", game_id=game_id))
+
+    return render_template("board_idle.html", **links(url_for("index")))
+
+
+@app.route("/board/<int:game_id>")
+def board(game_id: int):
+    game, row = load(game_id)
+    return render_template("board.html",
+                           **links(url_for("game_view", game_id=game_id)),
+                           **view(game, game_id, row))
+
+
+@app.route("/board/<int:game_id>/panel")
+def board_panel(game_id: int):
+    """Fragment, na který se tabule doptává každé dvě vteřiny."""
+    game, row = load(game_id)
+    return render_template("_panel.html", **view(game, game_id, row))
+
+
+@app.route("/stats")
+def hall():
+    conn = db()
+    return render_template("stats.html",
+                           records=stats.records(conn),
+                           careers=stats.careers(conn),
+                           games=storage.recent_games(conn))
+
+
+if __name__ == "__main__":
+    found = net.addresses()
+
+    if found:
+        print("Počitadlo je dostupné na:")
+        for address in found:
+            mark = "→" if address.primary else " "
+            print(f" {mark} {address.url(PORT):30} {address.label}")
+        print(f"\nTabule na notebook: {found[0].url(PORT)}/board")
+    else:
+        print("Adresu se nepodařilo zjistit. Spusť server s DICE_HOST=<adresa>.")
+
+    app.run(host="0.0.0.0", port=PORT, threaded=True)