Resume: exiting a match keeps it alive instead of destroying it

Leaving the table (back button, browser/hardware back) no longer resets the
game — it minimizes it and stays resumable:
- game-store: add `paused` + minimize()/resume(). Single-player (AI) matches
  pause their local timers so nothing happens while away; live (server-run)
  matches keep streaming via the still-active subscription (the .NET GameRoom
  already runs the match to completion and re-broadcasts state on reconnect).
- GameScreen: an unmount effect minimizes any in-progress match no matter how
  you leave; only a finished match (reward dismissed) tears down.
- ResumeGameBar: floating "return to game" pill shown from any screen while a
  match is alive, or while a finished match still has an unseen reward.
- page.tsx: after a full reload, re-enter live mode (minimized) when the server
  re-broadcasts state, and notify when a match you left finishes while away.

Verified: tsc + next build clean; web image rebuilt and serving on :1500.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/lib/game-store.ts

@@ -78,6 +78,8 @@ interface GameStore {
   live: boolean;
   /** reward pushed by the server for a server-run (ranked) match. */
   serverReward: RewardResult | null;
+  /** the match is still alive but the player navigated away (resumable). */
+  paused: boolean;
 
   newMatch: (settings: GameSettings) => void;
   newOnlineMatch: (cfg: OnlineMatchConfig) => void;
@@ -85,6 +87,10 @@ interface GameStore {
   applyServerState: (s: ServerGameState) => void;
   chooseTrump: (suit: Suit) => void;
   playHuman: (card: Card) => void;
+  /** Leave the table without ending the match — keeps it resumable. */
+  minimize: () => void;
+  /** Return to a minimized match (re-arms local AI timers; live keeps streaming). */
+  resume: () => void;
   reset: () => void;
 }
 
@@ -293,6 +299,7 @@ export const useGameStore = create<GameStore>((set, get) => {
     reconnectDeadline: null,
     live: false,
     serverReward: null,
+    paused: false,
 
     newMatch: (settings) => {
       clearPending();
@@ -302,6 +309,7 @@ export const useGameStore = create<GameStore>((set, get) => {
         game: selectHakem(initial),
         started: true,
         mode: "ai",
+        paused: false,
         matchMeta: { ranked: false, stake: 0 },
         tally: freshTally(),
         turnDeadline: null,
@@ -325,6 +333,7 @@ export const useGameStore = create<GameStore>((set, get) => {
         game: selectHakem(initial),
         started: true,
         mode: "online",
+        paused: false,
         matchMeta: { ranked: cfg.ranked, stake: cfg.stake },
         tally: freshTally(),
         turnDeadline: null,
@@ -353,6 +362,7 @@ export const useGameStore = create<GameStore>((set, get) => {
         mode: "online",
         live: true,
         serverReward: null,
+        paused: false,
         matchMeta: { ranked: true, stake: 0 },
         tally: freshTally(),
         turnDeadline: null,
@@ -418,6 +428,23 @@ export const useGameStore = create<GameStore>((set, get) => {
       scheduleAuto();
     },
 
+    minimize: () => {
+      // Keep the match alive and resumable. Single-player (AI) games pause their
+      // local timers so nothing happens while you're away; live (server-run)
+      // games keep streaming into the store via the still-active subscription.
+      if (!get().live) {
+        clearPending();
+        set({ turnDeadline: null, reconnectDeadline: null });
+      }
+      set({ paused: true });
+    },
+
+    resume: () => {
+      set({ paused: false });
+      // Re-arm the local driver for AI games; live games are already up to date.
+      if (!get().live && get().started && get().game.phase !== "match-over") scheduleAuto();
+    },
+
     reset: () => {
       clearPending();
       if (liveUnsub) {
@@ -435,6 +462,7 @@ export const useGameStore = create<GameStore>((set, get) => {
         mode: "ai",
         live: false,
         serverReward: null,
+        paused: false,
         seatPlayers: [],
         tally: freshTally(),
         turnDeadline: null,

src/lib/i18n.tsx

@@ -29,6 +29,11 @@ const fa: Dict = {
   "home.lang": "English",
   "home.onlineCount": "{n} نفر آنلاین",
 
+  "resume.title": "بازی در جریان",
+  "resume.cta": "بازگشت به بازی",
+  "resume.matchEnded": "بازی به پایان رسید",
+  "resume.matchEndedBody": "نتیجه و جایزه را ببینید",
+
   "seat.you": "شما",
   "team.us": "ما",
   "team.them": "حریف",
@@ -270,6 +275,11 @@ const en: Dict = {
   "home.lang": "فارسی",
   "home.onlineCount": "{n} players online",
 
+  "resume.title": "Game in progress",
+  "resume.cta": "Return to game",
+  "resume.matchEnded": "Match ended",
+  "resume.matchEndedBody": "See the result and reward",
+
   "seat.you": "You",
   "team.us": "Us",
   "team.them": "Them",