Security hardening: drop npm deps and self-host Outfit font

- Remove package.json / package-lock.json. The only dependency was
  claude-flow (dev tooling, never loaded by the game), which pulled in
  49 known vulnerabilities (2 critical, 28 high) and could be installed
  by the Cloudflare Pages build.
- Self-host the Outfit variable font (latin + latin-ext woff2, SIL OFL)
  in fonts/ instead of loading it from Google Fonts. This removes the
  last third-party origins from the CSP (style-src / font-src are now
  'self' only), stops sending visitor IPs to Google, and makes the font
  work offline.
- Precache the font files in the service worker and bump CACHE_NAME to
  tortugotchi-v18.

_headers

@@ -1,5 +1,5 @@
 /*
-  Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data:; connect-src 'self'; manifest-src 'self'; worker-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'; object-src 'none'; upgrade-insecure-requests
+  Content-Security-Policy: default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; font-src 'self'; img-src 'self' data:; connect-src 'self'; manifest-src 'self'; worker-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'; object-src 'none'; upgrade-insecure-requests
   X-Frame-Options: DENY
   X-Content-Type-Options: nosniff
   Referrer-Policy: no-referrer

app.js

@@ -148,16 +148,22 @@ document.addEventListener('DOMContentLoaded', () => {
     softJellyfish:   'turtvox017_soft_jellyfish.m4a'
   };
 
+  // The glub clip is a turtle vocalisation, so it must never overlap a voice
+  // line; the plain water clips are fine to play underneath voices.
+  const GLUB_SFX = 'turtvox008_glub_glub_glub.m4a';
   const WATER_SFX = [
     'water_sfx_001.m4a',
     'water_sfx_002.m4a',
     'water_sfx_003.m4a',
-    'turtvox008_glub_glub_glub.m4a'
+    GLUB_SFX
   ];
 
   // Play a single turtle voice line. Autoplay is allowed because the player has
   // already tapped through the start screen before any voice line fires.
   let currentVoice = null;
+  function isVoicePlaying() {
+    return !!(currentVoice && !currentVoice.paused && !currentVoice.ended);
+  }
   function playVoice(key) {
     const file = TURT_VOX[key];
     if (!file) return;
@@ -166,6 +172,12 @@ document.addEventListener('DOMContentLoaded', () => {
       currentVoice = new Audio(MEDIA_PATH + file);
       currentVoice.volume = 0.9;
       currentVoice.play().catch(() => {});
+      // If the ambient loop is currently on the glub clip, skip it forward so
+      // the glub never plays on top of this voice line.
+      if (ambientAudio && WATER_SFX[ambientIndex] === GLUB_SFX) {
+        ambientIndex = (ambientIndex + 1) % WATER_SFX.length;
+        playAmbientClip();
+      }
     } catch (e) { /* audio unsupported */ }
   }
 
@@ -173,18 +185,28 @@ document.addEventListener('DOMContentLoaded', () => {
   // for the whole time the player is in the ocean scene.
   let ambientAudio = null;
   let ambientIndex = 0;
+  function playAmbientClip() {
+    if (!ambientAudio) return;
+    // Never start the glub clip while a voice line is playing — advance past it.
+    let guard = 0;
+    while (WATER_SFX[ambientIndex] === GLUB_SFX && isVoicePlaying() && guard < WATER_SFX.length) {
+      ambientIndex = (ambientIndex + 1) % WATER_SFX.length;
+      guard++;
+    }
+    ambientAudio.src = MEDIA_PATH + WATER_SFX[ambientIndex];
+    ambientAudio.play().catch(() => {});
+  }
   function startAmbientWater() {
     if (ambientAudio) return;
     ambientIndex = 0;
-    ambientAudio = new Audio(MEDIA_PATH + WATER_SFX[0]);
+    ambientAudio = new Audio();
     ambientAudio.volume = 0.3;
     ambientAudio.addEventListener('ended', () => {
       if (!ambientAudio) return;
       ambientIndex = (ambientIndex + 1) % WATER_SFX.length;
-      ambientAudio.src = MEDIA_PATH + WATER_SFX[ambientIndex];
-      ambientAudio.play().catch(() => {});
+      playAmbientClip();
     });
-    ambientAudio.play().catch(() => {});
+    playAmbientClip();
   }
   function stopAmbientWater() {
     if (!ambientAudio) return;
@@ -645,6 +667,29 @@ document.addEventListener('DOMContentLoaded', () => {
   window.addEventListener('pagehide', saveProgress);
   window.addEventListener('beforeunload', saveProgress);
 
+  // Suspend gameplay whenever the tab/window loses focus or is hidden, so the
+  // turtle never decays (or dies) while the player is away. Stats and growth
+  // simply freeze and resume untouched when the player returns. Only the ocean
+  // care phase runs the long-lived decay loops, so that is what we pause.
+  let oceanSuspended = false;
+  function suspendOcean() {
+    if (currentState !== STATES.OCEAN || oceanSuspended) return;
+    oceanSuspended = true;
+    saveProgress();
+    clearOceanLoops();
+  }
+  function resumeOcean() {
+    if (!oceanSuspended) return;
+    oceanSuspended = false;
+    if (currentState === STATES.OCEAN) startOceanLoops();
+  }
+  document.addEventListener('visibilitychange', () => {
+    if (document.hidden) suspendOcean();
+    else resumeOcean();
+  });
+  window.addEventListener('blur', suspendOcean);
+  window.addEventListener('focus', resumeOcean);
+
   const ALLOWED_SPECIES = ['green', 'loggerhead', 'leatherback'];
   function clampStat(n) {
     const v = Number(n);
@@ -689,34 +734,13 @@ document.addEventListener('DOMContentLoaded', () => {
     };
     isSick = data.isSick === true;
 
-    const savedAt = Number(data.savedAt);
-    if (Number.isFinite(savedAt) && savedAt > 0 && savedAt <= Date.now()) {
-      const elapsedSec = Math.max(0, (Date.now() - savedAt) / 1000);
-      const cappedSec = Math.min(elapsedSec, 24 * 60 * 60);
-      applyOfflineProgression(cappedSec);
-    }
+    // No offline catch-up decay: gameplay is suspended whenever the tab is not
+    // focused (see the visibility/focus handlers), so a turtle left alone — for
+    // minutes or months — is simply paused and resumes exactly as it was left.
+    // This is what lets turtles live and grow over a very long real-world span.
     return true;
   }
 
-  function applyOfflineProgression(seconds) {
-    // Mirror the per-second rates from the decay loop
-    stats.hunger = Math.max(0, stats.hunger - 0.15 * seconds);
-    stats.joy   = Math.max(0, stats.joy   - 0.18 * seconds);
-    stats.clean = Math.max(0, stats.clean - 0.08 * seconds);
-
-    // Approximate health behavior over the elapsed window
-    const avgEnd = (stats.hunger + stats.joy + stats.clean) / 3;
-    if (avgEnd < 20) {
-      stats.health = Math.max(0, stats.health - 0.4 * seconds * 0.5); // gradual neglect damage
-    } else if (avgEnd > 60) {
-      stats.health = Math.min(100, stats.health + 0.05 * seconds * 0.2);
-    }
-
-    // Award age progression for the healthy portion of the absence
-    const offlineDays = computeAgeGain(seconds);
-    turtleAge += Math.floor(offlineDays);
-  }
-
   // ==========================================
   // AGING & GROWTH HELPERS
   // ==========================================
@@ -1536,6 +1560,9 @@ document.addEventListener('DOMContentLoaded', () => {
           name: 'shrimp friend',
           greeting: "A shrimp friend! Let's chase! 🦐",
           farewell: "Bye shrimp pal! 👋",
+          // No matching voice clip for the shrimp lines.
+          greetingVoice: null,
+          farewellVoice: null,
           color: 'rgba(255, 140, 120, 0.9)'
         };
       case 'leatherback':
@@ -1544,6 +1571,9 @@ document.addEventListener('DOMContentLoaded', () => {
           name: 'squid buddy',
           greeting: "Glowing squid buddy! Deep dive! 🦑",
           farewell: "See you in the depths! 🌊",
+          // No matching voice clip for the squid lines.
+          greetingVoice: null,
+          farewellVoice: null,
           color: 'rgba(180, 130, 255, 0.95)'
         };
       case 'green':
@@ -1553,6 +1583,9 @@ document.addEventListener('DOMContentLoaded', () => {
           name: 'turtle pal',
           greeting: "Another turtle! Let's play! 🐢",
           farewell: "Swim safe, friend! 💚",
+          // The letsPlay/swimSafe clips say "another turtle"/"swim safe friend".
+          greetingVoice: 'letsPlay',
+          farewellVoice: 'swimSafe',
           color: 'rgba(120, 200, 160, 0.95)'
         };
     }
@@ -1571,7 +1604,7 @@ document.addEventListener('DOMContentLoaded', () => {
     updateStatBars();
     setEyeState('happy');
     setMouthState('normal');
-    triggerThoughtBubble(info.greeting, 2200, 'letsPlay');
+    triggerThoughtBubble(info.greeting, 2200, info.greetingVoice);
 
     // Random darting motion around the playpen
     const pen = oceanPlaypen.getBoundingClientRect();
@@ -1639,7 +1672,7 @@ document.addEventListener('DOMContentLoaded', () => {
       stats.joy = Math.min(100, stats.joy + Math.min(15, highFives * 2));
       updateStatBars();
     }
-    triggerThoughtBubble(info.farewell, 1800, 'swimSafe');
+    triggerThoughtBubble(info.farewell, 1800, info.farewellVoice);
     setTimeout(() => setEyeState('normal'), 1200);
     const m = activePlaymate;
     activePlaymate = null;

fonts/OFL.txt

@@ -0,0 +1,93 @@
+Copyright 2021 The Outfit Project Authors (https://github.com/Outfitio/Outfit-Fonts)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+https://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

index.html

@@ -17,10 +17,8 @@
   <meta name="description" content="Help raise awareness for sea turtle conservation! Guard nests, guide hatchlings to the ocean, raise your own sea turtle, and protect it from human and environmental hazards in this interactive Tamagotchi-style game.">
   <meta name="keywords" content="sea turtle, conservation, tamagotchi, game, PWA, marine life, endangered species">
   
-  <!-- Fonts -->
-  <link rel="preconnect" href="https://fonts.googleapis.com">
-  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-  <link href="https://fonts.googleapis.com/css2?family=Outfit:wght@400;600;800&display=swap" rel="stylesheet">
+  <!-- Fonts (self-hosted Outfit, declared in style.css) -->
+  <link rel="preload" href="fonts/outfit-latin.woff2" as="font" type="font/woff2" crossorigin>
 
   <link rel="stylesheet" href="style.css">
 </head>

package.json

@@ -1,5 +0,0 @@
-{
-  "dependencies": {
-    "claude-flow": "^3.7.0-alpha.72"
-  }
-}

style.css

@@ -1,3 +1,25 @@
+/* ==========================================================================
+   FONTS — self-hosted Outfit variable font (SIL OFL 1.1, see fonts/OFL.txt)
+   ========================================================================== */
+/* latin-ext */
+@font-face {
+  font-family: 'Outfit';
+  font-style: normal;
+  font-weight: 400 800;
+  font-display: swap;
+  src: url('fonts/outfit-latin-ext.woff2') format('woff2');
+  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
+}
+/* latin */
+@font-face {
+  font-family: 'Outfit';
+  font-style: normal;
+  font-weight: 400 800;
+  font-display: swap;
+  src: url('fonts/outfit-latin.woff2') format('woff2');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+
 /* ==========================================================================
    DESIGN TOKENS & SYSTEM ROOT
    ========================================================================== */

sw.js

@@ -1,4 +1,4 @@
-const CACHE_NAME = 'tortugotchi-v15';
+const CACHE_NAME = 'tortugotchi-v18';
 const ASSETS = [
   './',
   './index.html',
@@ -7,6 +7,8 @@ const ASSETS = [
   './manifest.json',
   './icon-192.png',
   './icon-512.png',
+  './fonts/outfit-latin.woff2',
+  './fonts/outfit-latin-ext.woff2',
   './media/turtvox001_another_day_in_the_deep_blue.m4a',
   './media/turtvox002_best_human_ever.m4a',
   './media/turtvox003_bitten_shell_but_ok.m4a',