feat(learn): add audio paths for all courses, convert TTS to MP3, fix generator script

- Add audioPath for 3 legacy courses (Basics of Prayer, Understanding Fiqh, Quranic Arabic)
- Convert new course TTS from M4A to MP3 for consistency
- Fix generate-tts-local.js ext replacement bug (works with .mp3 now)
- All 7 courses now have 32 MP3 modules total (~74MB)
- Build passes (0 errors, 0 warnings)

prisma/seed-learn.json

@@ -27,7 +27,7 @@
           "keyTakeaway": "Understanding wudu, ghusl, and najasah is the foundation of valid prayer. Without proper purification, salah is not accepted.",
           "duration": 10,
           "content": "## Purification (Taharah)\n\nTaharah (purification) is half of faith. Before a Muslim can stand before Allah in prayer, they must be in a state of physical and spiritual cleanliness.\n\n### Types of Purification\n\n1. **Wudu (Ablution)** — Required before salah, touching the Quran, and circumambulating the Ka'bah.\n2. **Ghusl (Full Bath)** — Required after janabah (major impurity), menstruation, and postpartum bleeding.\n3. **Tayammum (Dry Ablution)** — A substitute using clean earth when water is unavailable or harmful.\n\n### Steps of Wudu\n1. Intention (Niyyah)\n2. Washing hands (3x)\n3. Rinsing mouth (3x)\n4. Cleaning nostrils (3x)\n5. Washing face (3x)\n6. Washing arms to elbows (3x, right then left)\n7. Wiping head (1x)\n8. Wiping ears (1x)\n9. Washing feet to ankles (3x, right then left)\n\n### Nullifiers of Wudu\n- Natural discharges (urine, stool, wind)\n- Deep sleep\n- Loss of consciousness\n- Touching private parts directly\n\n> **Tip:** Always say *Bismillah* before starting wudu.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/basics-of-prayer-salah/module-01.mp3",
           "quizData": "[{\"question\":\"What is the FIRST step of wudu?\",\"options\":[\"Washing the face\",\"Intention (Niyyah)\",\"Washing the hands\",\"Rinsing the mouth\"],\"correctIndex\":1},{\"question\":\"Which of the following NULLIFIES wudu?\",\"options\":[\"Eating with the right hand\",\"Deep sleep\",\"Reciting Quran\",\"Walking to the mosque\"],\"correctIndex\":1},{\"question\":\"Tayammum is performed when:\",\"options\":[\"Water is cold\",\"No water is available or water is harmful\",\"One is in a hurry\",\"One forgets the du'a\"],\"correctIndex\":1},{\"question\":\"How many times are the hands washed in wudu?\",\"options\":[\"Once\",\"Twice\",\"Three times\",\"Four times\"],\"correctIndex\":2}]",
           "createdAt": "2026-06-01T08:00:00.000Z",
           "updatedAt": "2026-06-10T10:00:00.000Z"
@@ -41,7 +41,7 @@
           "keyTakeaway": "Salah has 9 conditions (shurut) and 13 pillars (arkan). Missing any pillar invalidates the prayer; missing a condition means the prayer never began.",
           "duration": 10,
           "content": "## The Conditions & Pillars of Salah\n\n### Conditions of Salah (Shurut — prerequisites before beginning)\n\n1. **Islam** — Only a Muslim's prayer is valid.\n2. **Sanity ('Aql)** — Must be of sound mind.\n3. **Discernment (Tamyiz)** — Age/ability to understand the prayer.\n4. **Removal of impurity (Raf' al-Hadath)** — Wudu or ghusl.\n5. **Removal of najasah** — Clean clothes, body, and place.\n6. **Covering the 'awrah** — Men: navel to knees. Women: entire body except face and hands.\n7. **Facing the Qiblah** — Toward the Ka'bah in Makkah.\n8. **Entering the correct time** — Each salah has a specific window.\n9. **Intention (Niyyah)** — In the heart, not spoken.\n\n### Pillars of Salah (Arkan — essential acts)\n\n1. Standing (Qiyam) — if able\n2. Opening Takbir (Allahu Akbar)\n3. Reciting Al-Fatihah\n4. Ruku' (bowing)\n5. Standing after Ruku'\n6. Sujud (prostration) on 7 bones\n7. Sitting between two prostrations\n8. Final Tashahhud\n9. Sitting for Tashahhud\n10. Salawat upon the Prophet\n11. Taslim (saying Salam)\n12. Tranquility (Tuma'ninah) in each pillar\n13. Correct order\n\n> **Note:** Missing a pillar on purpose or forgetfully requires repeating the prayer.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/basics-of-prayer-salah/module-02.mp3",
           "quizData": "[{\"question\":\"How many conditions (shurut) must be met before salah begins?\",\"options\":[\"5\",\"7\",\"9\",\"13\"],\"correctIndex\":2},{\"question\":\"Which of the following is a PILLAR (rukn) of salah?\",\"options\":[\"Facing the Qiblah\",\"Covering the 'awrah\",\"Reciting Al-Fatihah\",\"Being in a clean place\"],\"correctIndex\":2},{\"question\":\"What does 'tuma'ninah' mean in the context of salah?\",\"options\":[\"Facing the right direction\",\"Tranquility and stillness in each posture\",\"Reciting in a loud voice\",\"Raising the hands\"],\"correctIndex\":1},{\"question\":\"What is the minimum covering ('awrah) for men in salah?\",\"options\":[\"Shoulders to knees\",\"Navel to knees\",\"Full body except face\",\"Chest to thighs\"],\"correctIndex\":1}]",
           "createdAt": "2026-06-02T08:00:00.000Z",
           "updatedAt": "2026-06-10T10:00:00.000Z"
@@ -55,7 +55,7 @@
           "keyTakeaway": "Every movement and recitation in salah has a purpose. Mastering the physical postures and the meanings of the words deepens your connection with Allah.",
           "duration": 10,
           "content": "## Step-by-Step Guide to Praying\n\n### 1. Standing (Qiyam)\nFace the Qiblah, feet shoulder-width apart, gaze at the place of sujud.\n\n### 2. Opening Takbir\nRaise both hands to your ears (men) or shoulders (women) and say **Allahu Akbar**.\n\n### 3. Opening Du'a (Thana')\n> *Subhanaka Allahumma wa bihamdika, wa tabarakasmuka, wa ta'ala jadduka, wa la ilaha ghayruk.*\n\n### 4. Recitation of Al-Fatihah\nRecite Surah Al-Fatihah in every rak'ah. Then recite any additional surah or verses.\n\n### 5. Ruku' (Bowing)\nBend at the waist, back flat, hands on knees. Say **Subhana Rabbiyal 'Adhim** (3x).\n\n### 6. Standing from Ruku'\nSay **Sami'Allahu liman hamidah, Rabbana lakal hamd**.\n\n### 7. Sujud (Prostration)\nGo down with your knees first, then hands, then forehead and nose. Say **Subhana Rabbiyal A'la** (3x).\n\n### 8. Between the Two Prostrations\nSit up straight, say **Rabbi ghfir li, Rabbi ghfir li**.\n\n### 9. Second Sujud — same as the first.\n\n### 10. Tashahhud (in the 2nd and final rak'ah)\n> *At-tahiyyatu lillahi was-salawatu wat-tayyibat...*\n\n### 11. Taslim\nTurn right: **Assalamu 'alaykum wa rahmatullah**. Then turn left: same.\n\n> **Practice tip:** Pray two rak'ahs of voluntary prayer daily until the movements become natural.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/basics-of-prayer-salah/module-03.mp3",
           "quizData": "[{\"question\":\"What is recited during ruku'?\",\"options\":[\"Sami'Allahu liman hamidah\",\"Subhana Rabbiyal 'Adhim\",\"Subhana Rabbiyal A'la\",\"Rabbi ghfir li\"],\"correctIndex\":1},{\"question\":\"What is recited between the two prostrations?\",\"options\":[\"Subhana Rabbiyal A'la\",\"Rabbana lakal hamd\",\"Rabbi ghfir li\",\"Allahu Akbar\"],\"correctIndex\":2},{\"question\":\"How many rak'ahs are in Fajr prayer?\",\"options\":[\"2\",\"3\",\"4\",\"1\"],\"correctIndex\":0},{\"question\":\"During sujud, how many body parts should touch the ground?\",\"options\":[\"5\",\"6\",\"7\",\"8\"],\"correctIndex\":2}]",
           "createdAt": "2026-06-03T08:00:00.000Z",
           "updatedAt": "2026-06-10T10:00:00.000Z"
@@ -69,7 +69,7 @@
           "keyTakeaway": "Many Muslims unknowingly make errors in salah that can reduce its reward or invalidate it. Awareness is the first step to correction.",
           "duration": 5,
           "content": "## Common Mistakes & How to Avoid Them\n\n### 1. Rushing through Salah\nMany pray so quickly that there is no tranquility (tuma'ninah). **Fix:** Pause between each movement.\n\n### 2. Not Reciting Al-Fatihah Properly\nSkipping verses, mispronouncing, or reciting too fast. **Fix:** Learn tajweed rules for Al-Fatihah.\n\n### 3. Looking Around\nEyes wandering during prayer. **Fix:** Fix your gaze on the place of sujud.\n\n### 4. Crossing the Sutrah Line\nWalking in front of someone praying. **Fix:** Place a sutrah (barrier) in front of you.\n\n### 5. Praying When Food is Served\nThe Prophet ﷺ said: \"No prayer when food is served.\" **Fix:** Eat first, then pray with calmness.\n\n### 6. Moving Before the Imam (in congregation)\n**Fix:** Follow the imam, never precede him.\n\n### 7. Incorrect Posture in Sujud\nNot placing all seven bones (forehead, nose, two hands, two knees, two feet).\n\n### 8. Forgetting the Obligatory Acts (Wajibat)\nE.g., saying the first tashahhud. **Fix:** Perform sujud as-sahw (prostration of forgetfulness).\n\n> **Key takeaway:** The Prophet ﷺ said, *\"Pray as you have seen me praying.\"* Use this hadith as your benchmark.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/basics-of-prayer-salah/module-04.mp3",
           "quizData": "[{\"question\":\"What is sujud as-sahw?\",\"options\":[\"An extra prayer at night\",\"Prostration of forgetfulness to correct mistakes in salah\",\"A type of voluntary prayer\",\"Prostration during Quran recitation\"],\"correctIndex\":1},{\"question\":\"What should you do if food is served and you want to pray?\",\"options\":[\"Pray quickly and then eat\",\"Eat first, then pray\",\"Skip the prayer\",\"Pray while eating\"],\"correctIndex\":1},{\"question\":\"How many bones should touch the ground in sujud?\",\"options\":[\"5\",\"6\",\"7\",\"8\"],\"correctIndex\":2},{\"question\":\"What does 'tuma'ninah' prevent in salah?\",\"options\":[\"Loud recitation\",\"Rushing through movements\",\"Forgetting the Qiblah\",\"Missing the congregation\"],\"correctIndex\":1}]",
           "createdAt": "2026-06-04T08:00:00.000Z",
           "updatedAt": "2026-06-10T10:00:00.000Z"
@@ -103,7 +103,7 @@
           "keyTakeaway": "Usul al-fiqh is the methodology by which jurists derive rulings from the primary sources. Without usul, fiqh becomes arbitrary opinion.",
           "duration": 15,
           "content": "## Introduction to Usul al-Fiqh\n\nUsul al-Fiqh (Principles of Jurisprudence) is the framework that governs how Islamic rulings are derived from their sources.\n\n### The Primary Sources (Adillah al-Asliyyah)\n\n1. **The Quran** — The verbatim word of Allah, the primary source.\n2. **The Sunnah** — The teachings, actions, and approvals of the Prophet ﷺ.\n\n### The Secondary Sources (Adillah al-Tabi'ah)\n\n3. **Ijma' (Consensus)** — Agreement of qualified scholars on a ruling.\n4. **Qiyas (Analogical Reasoning)** — Extending a ruling from an original case to a new case due to shared cause ('illah).\n\n### Other Evidences (controversial among schools)\n- **Istihsan (Juridical Preference)** — Preferred by Hanafi school.\n- **Maslahah Mursalah (Public Interest)** — Preferred by Maliki school.\n- **'Urf (Custom)** — Considered when no explicit text exists.\n- **Sadd al-Dhara'i' (Blocking the Means)** — Preferred by Hanbali school.\n- **Qawl al-Sahabi (Companion's Opinion)** — Various levels of acceptance.\n\n### The Five Rulings (Al-Ahkam al-Khamsah)\n1. **Wajib / Fard** — Obligatory (rewarded, sin if left)\n2. **Mandub / Mustahabb** — Recommended (rewarded, no sin if left)\n3. **Mubah / Halal** — Permissible (no reward or sin)\n4. **Makruh** — Disliked (rewarded if left, no sin if done)\n5. **Haram** — Forbidden (sin if done, rewarded if left)\n\n> **The goal of usul:** To ensure that rulings are derived systematically, not based on personal desire.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/understanding-fiqh/module-01.mp3",
           "quizData": "[{\"question\":\"Which of the following is a PRIMARY source of Islamic law?\",\"options\":[\"Qiyas\",\"Ijma'\",\"The Quran\",\"Istihsan\"],\"correctIndex\":2},{\"question\":\"What does 'Wajib' mean in the five rulings?\",\"options\":[\"Recommended\",\"Permissible\",\"Obligatory\",\"Forbidden\"],\"correctIndex\":2},{\"question\":\"Qiyas (analogical reasoning) requires a shared what between the original case and the new case?\",\"options\":[\"Text\",\"Custom\",\"Cause ('illah)\",\"Time period\"],\"correctIndex\":2},{\"question\":\"How many primary sources are agreed upon by all four schools?\",\"options\":[\"Two (Quran and Sunnah)\",\"Four (adding Ijma' and Qiyas)\",\"Five (adding Istihsan)\",\"Three (Quran, Sunnah, Ijma')\"],\"correctIndex\":0}]",
           "createdAt": "2026-06-05T08:00:00.000Z",
           "updatedAt": "2026-06-15T10:00:00.000Z"
@@ -117,7 +117,7 @@
           "keyTakeaway": "The four Sunni madhahib are not sects but methodologies. All are valid, and Muslims may follow any school with respect for the others.",
           "duration": 15,
           "content": "## The Four Schools of Thought (Madhahib)\n\n### 1. Hanafi School — Founded by Imam Abu Hanifah (d. 150 AH)\n- Most widespread school geographically (Turkey, Balkans, Indian subcontinent, Central Asia)\n- Heavy reliance on **ra'y (reason)** and **qiyas**\n- Known for extensive use of **istihsan**\n- School of the Ottoman Empire and Mughal Empire\n\n### 2. Maliki School — Founded by Imam Malik (d. 179 AH)\n- Dominant in North and West Africa\n- Strong reliance on **'amal ahl al-Madinah** (practice of the people of Madinah)\n- Considers **maslahah mursalah** (public interest) as a source\n- Known for the Muwatta' — the earliest surviving compilation of hadith and fiqh\n\n### 3. Shafi'i School — Founded by Imam Al-Shafi'i (d. 204 AH)\n- Dominant in East Africa, Yemen, Southeast Asia (Indonesia, Malaysia)\n- Considered the \"father of usul al-fiqh\" for writing *Al-Risalah*\n- Balances textual evidence with qiyas; rejects istihsan\n- Follows the stronger position on hadith authenticity\n\n### 4. Hanbali School — Founded by Imam Ahmad (d. 241 AH)\n- Dominant in Saudi Arabia and the Gulf\n- Most strict adherence to **zahir (literal meaning)** of texts\n- Minimal use of qiyas; prefers weak hadith over qiyas\n- Official school of modern-day Saudi Arabia\n\n### Can one switch between schools?\nYes, but scholars advise consistency within one school for daily practice unless a genuine need arises.\n\n> **Respect for all schools:** اختلاف أمتي رحمة — \"The differences among my ummah are a mercy.\"",
-          "audioPath": null,
+          "audioPath": "/audio/learn/understanding-fiqh/module-02.mp3",
           "quizData": "[{\"question\":\"Which school heavily relies on the practice of the people of Madinah ('amal ahl al-Madinah)?\",\"options\":[\"Hanafi\",\"Maliki\",\"Shafi'i\",\"Hanbali\"],\"correctIndex\":1},{\"question\":\"Imam Al-Shafi'i is known for authoring which foundational work?\",\"options\":[\"Al-Muwatta'\",\"Al-Risalah\",\"Al-Umm\",\"Musnad Ahmad\"],\"correctIndex\":1},{\"question\":\"Which school is most prevalent in Southeast Asia?\",\"options\":[\"Hanafi\",\"Maliki\",\"Shafi'i\",\"Hanbali\"],\"correctIndex\":2},{\"question\":\"Which school was the official school of the Ottoman Empire?\",\"options\":[\"Hanafi\",\"Maliki\",\"Shafi'i\",\"Hanbali\"],\"correctIndex\":0}]",
           "createdAt": "2026-06-06T08:00:00.000Z",
           "updatedAt": "2026-06-15T10:00:00.000Z"
@@ -131,7 +131,7 @@
           "keyTakeaway": "Every ruling in the Shari'ah is designed to preserve one of five essential human necessities. Understanding maqasid unlocks the wisdom behind Islamic law.",
           "duration": 10,
           "content": "## Maqasid al-Shari'ah (Higher Objectives of Islamic Law)\n\n### The Five Essential Necessities (Al-Daruriyyat al-Khams)\n\n1. **Preservation of Religion (Hifz al-Din)**\n   - Freedom of belief\n   - Obligation to pray, fast, give zakah\n   - Defending the faith\n\n2. **Preservation of Life (Hifz al-Nafs)**\n   - Prohibition of murder\n   - Laws of retribution (qisas)\n   - Permissibility of eating haram food in dire necessity\n\n3. **Preservation of Intellect (Hifz al-'Aql)**\n   - Prohibition of intoxicants\n   - Encouragement of seeking knowledge\n\n4. **Preservation of Lineage (Hifz al-Nasl)**\n   - Laws of marriage and family\n   - Prohibition of zina (adultery)\n   - Rules of inheritance\n\n5. **Preservation of Wealth (Hifz al-Mal)**\n   - Prohibition of theft and bribery\n   - Laws of trade and contracts\n   - Zakah as wealth purification\n\n### Levels of Objectives\n1. **Daruriyyat (Necessities)** — Must be protected for life to function\n2. **Hajiyyat (Needs)** — Needed to remove hardship (e.g., loans, leasing)\n3. **Tahsiniyyat (Luxuries/Improvements)** — To beautify life (e.g., good food, nice clothes)\n\n> **Example:** Alcohol is haram because it destroys the intellect ('aql), which is one of the five essentials. However, if a person is dying of thirst and only alcohol is available, it becomes permissible to preserve life (hifz al-nafs).",
-          "audioPath": null,
+          "audioPath": "/audio/learn/understanding-fiqh/module-03.mp3",
           "quizData": "[{\"question\":\"How many essential human necessities (daruriyyat) does the Shari'ah aim to preserve?\",\"options\":[\"Three\",\"Four\",\"Five\",\"Seven\"],\"correctIndex\":2},{\"question\":\"Which necessity is protected by prohibiting intoxicants?\",\"options\":[\"Religion\",\"Life\",\"Intellect\",\"Wealth\"],\"correctIndex\":2},{\"question\":\"Zakah is primarily aimed at preserving which necessity?\",\"options\":[\"Religion\",\"Lineage\",\"Wealth\",\"Intellect\"],\"correctIndex\":2},{\"question\":\"The permissibility of eating haram food in a life-threatening situation falls under which principle?\",\"options\":[\"Necessity permits the prohibited\",\"Custom is a source of law\",\"Certainty is not overruled by doubt\",\"Hardship brings ease\"],\"correctIndex\":0}]",
           "createdAt": "2026-06-07T08:00:00.000Z",
           "updatedAt": "2026-06-15T10:00:00.000Z"
@@ -145,7 +145,7 @@
           "keyTakeaway": "Fiqh is not just theory — it governs every aspect of daily Muslim life from food to finance. Knowing the rulings makes worship and transactions valid.",
           "duration": 10,
           "content": "## Practical Fiqh: Daily Life Rulings\n\n### Food & Drink\n- **Halal animals:** All seafood (Hanafi differs), cattle, sheep, goats, chicken (when slaughtered Islamically)\n- **Zabihah (Islamic slaughter):** Cut throat, mention Allah's name, drain blood\n- **Haram:** Pork, blood, carrion, animals not slaughtered in Allah's name, intoxicants\n\n### Dress Code\n- **Men:** Must cover navel to knees. Silk and gold are prohibited.\n- **Women:** Must cover entire body except face and hands in front of non-mahram. No tight or transparent clothing.\n\n### Financial Transactions (Mu'amalat)\n- **Riba (Interest)** — Absolutely haram, whether giving or taking\n- **Gharar (Excessive uncertainty)** — Invalidates contracts\n- **Zakah** — 2.5% on wealth held for one lunar year\n\n### Marriage (Nikah)\n- Pillars: Offer (ijab), acceptance (qabul), guardian (wali), two witnesses, mahr (dowry)\n- Conditions: Mutual consent, no impediments\n\n### Hygiene\n- **Istinja'** — Cleaning after using the toilet (water preferred)\n- **Siwak** — Using miswak toothstick is sunnah before every prayer\n\n> **Golden rule in fiqh:** *Al-Aslu fi al-ashya' al-ibahah* — The default ruling for all things is permissibility, unless proven otherwise.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/understanding-fiqh/module-04.mp3",
           "quizData": "[{\"question\":\"What is the default ruling for things in Islam?\",\"options\":[\"Forbidden unless proven otherwise\",\"Permissible unless proven otherwise\",\"Recommended\",\"Neutral\"],\"correctIndex\":1},{\"question\":\"Which of the following is haram in financial transactions?\",\"options\":[\"Partnerships\",\"Riba (interest)\",\"Trade with mutual consent\",\"Leasing\"],\"correctIndex\":1},{\"question\":\"How much zakah is due on wealth held for one lunar year?\",\"options\":[\"1%\",\"2.5%\",\"5%\",\"10%\"],\"correctIndex\":1},{\"question\":\"Men are prohibited from wearing which material?\",\"options\":[\"Cotton\",\"Wool\",\"Silk\",\"Linen\"],\"correctIndex\":2}]",
           "createdAt": "2026-06-08T08:00:00.000Z",
           "updatedAt": "2026-06-15T10:00:00.000Z"
@@ -179,7 +179,7 @@
           "keyTakeaway": "Arabic sentences are either nominal (jumla ismiyyah) or verbal (jumla fi'liyyah). Understanding the three parts of speech — noun, verb, particle — is the foundation of nahw.",
           "duration": 15,
           "content": "## Introduction to Arabic Grammar (Nahw)\n\n### The Three Parts of Speech\n\n1. **Ism (Noun/اسم)** — A word that has meaning in itself without being tied to time.\n   - Examples: رجل (man), كتاب (book), مسجد (mosque)\n   - Includes pronouns, adjectives, and proper nouns\n\n2. **Fi'l (Verb/فعل)** — An action linked to a time.\n   - ماضي (past): كتب (he wrote)\n   - مضارع (present/future): يكتب (he writes/will write)\n   - أمر (command): اكتب (write!)\n\n3. **Harf (Particle/حرف)** — A word with no meaning by itself.\n   - Examples: في (in), على (on), من (from), هل (question particle)\n\n### Nominal vs. Verbal Sentences\n\n**Nominal Sentence (جملة اسمية)**\n- Begins with a noun\n- Has two parts: مبتدأ (subject/topic) + خبر (predicate)\n- Example: البيتُ كبيرٌ (The house is big)\n- Both are in nominative case (رفع)\n\n**Verbal Sentence (جملة فعلية)**\n- Begins with a verb\n- Has three parts: فعل (verb) + فاعل (subject/doer) + مفعول به (object) — optional\n- Example: كتبَ الطالبُ الدرسَ (The student wrote the lesson)\n\n### I'rab (Case Endings)\n- **Nominative (الرفع)** — Default case for subjects — marked by dammah (ـُ)\n- **Accusative (النصب)** — Objects and certain particles — marked by fatha (ـَ)\n- **Genitive (الجر)** — After prepositions and possession — marked by kasra (ـِ)\n\n> **Key insight:** A single dammah vs. fatha changes the entire grammatical role of a word in the verse. This is why nahw is essential for understanding the Quran.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/quranic-arabic-grammar/module-01.mp3",
           "quizData": "[{\"question\":\"What are the three parts of speech in Arabic?\",\"options\":[\"Noun, verb, adjective\",\"Noun, verb, particle\",\"Subject, verb, object\",\"Past, present, command\"],\"correctIndex\":1},{\"question\":\"A nominal sentence (jumlah ismiyyah) begins with:\",\"options\":[\"A verb\",\"A particle\",\"A noun\",\"An adverb\"],\"correctIndex\":2},{\"question\":\"Which case ending (i'rab) marks the subject (fa'il) of a verb?\",\"options\":[\"Nominative (raf') with dammah\",\"Accusative (nasb) with fatha\",\"Genitive (jarr) with kasra\",\"Jussive (jazm) with sukun\"],\"correctIndex\":0},{\"question\":\"In the sentence 'كتبَ الطالبُ الدرسَ', what case is 'الدرسَ'?\",\"options\":[\"Nominative\",\"Accusative\",\"Genitive\",\"Jussive\"],\"correctIndex\":1}]",
           "createdAt": "2026-06-10T08:00:00.000Z",
           "updatedAt": "2026-06-18T10:00:00.000Z"
@@ -193,7 +193,7 @@
           "keyTakeaway": "Classical Arabic verbs are built on a three-consonant root system. Changing the pattern (wazn) changes the meaning systematically — this is sarf.",
           "duration": 15,
           "content": "## Verb Morphology (Sarf): The Root System\n\n### The Arabic Root System\n\nAlmost every word in Arabic derives from a **three-consonant root** (جذر ثلاثي). The root carries the core meaning, and various patterns (أوزان) are applied to create related words.\n\n**Example: Root ك-ت-ب (k-t-b) — Writing**\n\n| Pattern | Word | Meaning |\n|---------|------|---------|\n| فَعَلَ | كَتَبَ | He wrote |\n| فاعَلَ | كاتَبَ | He corresponded |\n| أفعَلَ | أكتَبَ | He dictated |\n| تَفَعَّلَ | تَكَتَّبَ | He wrote to each other |\n| اِفتَعَلَ | اِكتَتَبَ | He copied / registered |\n| مَفعَلٌ | مَكتَبٌ | Office / desk |\n| فاعِلٌ | كاتِبٌ | Writer (subject noun) |\n| مَفعُولٌ | مَكتوبٌ | Written (object noun) |\n\n### The Ten Standard Verb Forms (الأوزان العشرة)\n\n1. **فَعَلَ** — Base form (e.g., نَصَرَ — he helped)\n2. **فَعَّلَ** — Intensification (e.g., كَسَّرَ — he smashed)\n3. **فاعَلَ** — Mutual action (e.g., ضارَبَ — he fought)\n4. **أفعَلَ** — Causative (e.g., أكرَمَ — he honored)\n5. **تَفَعَّلَ** — Reflexive (e.g., تَعَلَّمَ — he learned)\n6. **تَفاعَلَ** — Mutual/reciprocal (e.g., تَقاتَلَ — they fought each other)\n7. **اِنفَعَلَ** — Passive (e.g., اِنكَسَرَ — it broke)\n8. **اِفتَعَلَ** — Reflective/self (e.g., اِجتَهَدَ — he strived)\n9. **اِفعَلَّ** — Colors/defects (e.g., اِحمَرَّ — it turned red)\n10. **اِستَفعَلَ** — Request/estimation (e.g., اِستَغفَرَ — he asked for forgiveness)\n\n> **Quranic example:** The root ر-ح-م (mercy) appears across multiple forms: رحمة (mercy), رحيم (merciful), رحمن (the Most Merciful), استرحم (he begged for mercy).",
-          "audioPath": null,
+          "audioPath": "/audio/learn/quranic-arabic-grammar/module-02.mp3",
           "quizData": "[{\"question\":\"Most Arabic words are built on how many consonant letters?\",\"options\":[\"Two\",\"Three\",\"Four\",\"Five\"],\"correctIndex\":1},{\"question\":\"Verb Form IV (أفعَلَ) generally indicates what?\",\"options\":[\"Intensification\",\"Mutual action\",\"Causative\",\"Passive\"],\"correctIndex\":2},{\"question\":\"Form VIII (اِفتَعَلَ) is often used for:\",\"options\":[\"Colors and defects\",\"Reflective/self-action\",\"Mutual action\",\"Requesting something\"],\"correctIndex\":1},{\"question\":\"What is the Form X (اِستَفعَلَ) of 'to forgive' (غفر)?\",\"options\":[\"غَفَرَ\",\"غَفَّرَ\",\"اِستَغفَرَ\",\"تَغَفَّرَ\"],\"correctIndex\":2}]",
           "createdAt": "2026-06-11T08:00:00.000Z",
           "updatedAt": "2026-06-18T10:00:00.000Z"
@@ -207,7 +207,7 @@
           "keyTakeaway": "Every word in the Quran carries grammatical markers that unlock precise meaning. A single change in i'rab can alter the theological implication of an ayah.",
           "duration": 20,
           "content": "## Analyzing Quranic Verses Grammatically\n\n### Example 1: Ayat al-Kursi (2:255)\n\n> **اللَّهُ لَا إِلَٰهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ**\n\n- **اللَّهُ** — Subject (مبتدأ), nominative case\n- **لَا إِلَٰهَ** — لَا النافية للجنس (لا of negation) + its noun in accusative\n- **إِلَّا** — Particle of exception\n- **هُوَ** — Substitute in place of the predicate\n- **الْحَيُّ الْقَيُّومُ** — Two adjectives of Allah, nominative\n\n### Example 2: Bismillah (1:1)\n\n> **بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ**\n\n- **بِ** — Preposition (حرف جر)\n- **سْمِ** — Noun, genitive case due to preposition\n- **اللَّهِ** — Possessive/noun in genitive (مضاف إليه)\n- **الرَّحْمَٰنِ** — First adjective, genitive following the noun\n- **الرَّحِيمِ** — Second adjective, genitive\n\n### Example 3: Key Grammatical Features in the Quran\n\n1. **إعراب (I'rab)** — Case endings that determine meaning\n   - إِيَّاكَ نَعْبُدُ — \"You alone we worship\" (object pronoun placed before verb for emphasis)\n2. **التقديم والتأخير (Fronting and delaying)** — Changes emphasis\n   - إِنَّمَا يَخْشَى اللَّهَ مِنْ عِبَادِهِ الْعُلَمَاءُ — The subject is delayed for emphasis\n3. **الحذف (Ellipsis)** — Words are omitted for conciseness\n   - وَلَا يُفْلِحُ الْكَافِرُونَ — The implicit \"indeed\" (قَدْ) is understood\n4. **الضمير (Pronouns)** — Often refer back to Allah in ambiguous ways for tawhid emphasis\n\n> **Benefit:** Understanding nahw allows you to see why scholars derive different rulings from the same verse — often it hinges on a single grammatical analysis.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/quranic-arabic-grammar/module-03.mp3",
           "quizData": "[{\"question\": \"In 'بِسْمِ اللَّهِ', the word 'اللَّهِ' is in which grammatical case?\", \"options\": [\"Nominative\", \"Accusative\", \"Genitive\", \"Jussive\"], \"correctIndex\": 2}, {\"question\": \"In 'إِيَّاكَ نَعْبُدُ', the fronting of 'إِيَّاكَ' before the verb indicates:\", \"options\": [\"Negation\", \"Emphasis/exclusivity\", \"Question\", \"Condition\"], \"correctIndex\": 1}, {\"question\": \"'الرَّحْمَٰنِ' in the basmalah is grammatically what?\", \"options\": [\"A verb\", \"A predicate\", \"An adjective following the noun\", \"An object\"], \"correctIndex\": 2}, {\"question\": \"لا إِلَٰهَ إِلَّا اللَّهُ — what grammatical construction is 'لا إِلَٰهَ'?\", \"options\": [\"Negative verb\", \"لا of generic negation\", \"Prohibition\", \"Relative clause\"], \"correctIndex\": 1}]",
           "createdAt": "2026-06-12T08:00:00.000Z",
           "updatedAt": "2026-06-18T10:00:00.000Z"
@@ -221,7 +221,7 @@
           "keyTakeaway": "Balaaghah is the science of eloquence. The Quran is the ultimate example of Arabic eloquence, and studying its rhetorical devices deepens both appreciation and understanding.",
           "duration": 10,
           "content": "## Rhetoric (Balaaghah) & Quranic Style\n\nBalaaghah (بلاغة) is divided into three sciences:\n\n### 1. 'Ilm al-Ma'ani (علم المعاني) — The study of sentence construction\nFocuses on how the structure of a sentence affects its meaning.\n\n- **Khabar vs. Insha'** — Statements vs. requests\n- **Qasr (Restriction)** — Restricting something to another (e.g., إِيَّاكَ نَعْبُدُ = You ALONE we worship)\n- **Ijaaz (Brevity) vs. Itnaab (Elaboration)** — When to be concise vs. detailed\n\n### 2. 'Ilm al-Bayan (علم البيان) — The study of figurative language\n- **Tashbih (Simile)** — Explicit comparison using كَ (like) or كَأَنَّ (as if)\n  - Example: \"He is like a donkey carrying books\" (62:5)\n- **Isti'arah (Metaphor)** — Implicit comparison\n  - Example: \"They have hearts but do not understand\" (7:179) — heart as seat of understanding\n- **Kinaayah (Metonymy)** — Indirect reference\n  - Example: \"And lower your wing to the believers\" (15:88) — be humble\n\n### 3. 'Ilm al-Badi' (علم البديع) — The study of rhetorical embellishments\n- **Jinas (Paronomasia/Punning)** — Using the same root in different forms\n  - Example: \"When the earth is shaken with its shake\" (99:1) — زِلْزَالَ vs زَلْزَلَت\n- **Tibaq (Antithesis)** — Juxtaposition of opposites\n  - Example: \"And that He causes to laugh and causes to weep\" (53:43)\n- **Mura'ah al-Nazir (Congruence)** — Mentioning related concepts together\n\n### Why Balaaghah Matters for Quranic Understanding\n\nMany objections to the Quran from non-Arabic speakers arise because they miss the rhetorical layers. For example, the seemingly repetitive verses in the Quran are actually masterclasses in emphasis, variation, and audience awareness.\n\n> **The challenge of the Quran:** \"And if you are in doubt about what We have revealed to Our servant, then produce a surah like it...\" (2:23) — the inimitability (**I'jaz**) of the Quran lies partly in its unmatched balaaghah.",
-          "audioPath": null,
+          "audioPath": "/audio/learn/quranic-arabic-grammar/module-04.mp3",
           "quizData": "[{\"question\":\"What does 'Ilm al-Bayan study?\",\"options\":[\"Sentence construction\",\"Figurative language and imagery\",\"Rhetorical embellishments\",\"Verb morphology\"],\"correctIndex\":1},{\"question\":\"The Quranic phrase 'lower your wing to the believers' is an example of:\",\"options\":[\"Simile (tashbih)\",\"Metaphor (isti'arah)\",\"Metonymy (kinaayah)\",\"Antithesis (tibaq)\"],\"correctIndex\":2},{\"question\":\"إِيَّاكَ نَعْبُدُ is an example of which rhetorical device?\",\"options\":[\"Simile\",\"Restriction (qasr)\",\"Punning (jinas)\",\"Elaboration (itnaab)\"],\"correctIndex\":1},{\"question\":\"The inimitability of the Quran is known as:\",\"options\":[\"Balaaghah\",\"I'jaz\",\"Nahw\",\"Sarf\"],\"correctIndex\":1}]",
           "createdAt": "2026-06-13T08:00:00.000Z",
           "updatedAt": "2026-06-18T10:00:00.000Z"
@@ -382,7 +382,7 @@
           "slug": "meaning-virtue-fasting",
           "keyTakeaway": "Fasting is the fourth pillar of Islam. It is not merely abstaining from food — it is a shield that protects from sin and draws the believer closer to Allah.",
           "duration": 2,
-          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-01.m4a",
+          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-01.mp3",
           "quizData": {
             "questions": [
               {
@@ -406,7 +406,7 @@
           "slug": "intention-and-suhoor",
           "keyTakeaway": "The intention for fasting must be made before dawn. Suhoor is a blessed meal — the Prophet ﷺ called it the meal of the righteous.",
           "duration": 2,
-          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-02.m4a",
+          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-02.mp3",
           "quizData": {
             "questions": [
               {
@@ -430,7 +430,7 @@
           "slug": "what-breaks-the-fast",
           "keyTakeaway": "Eating, drinking, and sexual intercourse intentionally break the fast. Mistakes like forgetting or eating without knowledge do not break it.",
           "duration": 3,
-          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-03.m4a",
+          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-03.mp3",
           "quizData": {
             "questions": [
               {
@@ -454,7 +454,7 @@
           "slug": "exemptions-and-make-up",
           "keyTakeaway": "Illness, travel, pregnancy, breastfeeding, and old age are valid exemptions. Each category has specific rules for making up fasts or paying fidyah.",
           "duration": 2,
-          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-04.m4a",
+          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-04.mp3",
           "quizData": {
             "questions": [
               {
@@ -478,7 +478,7 @@
           "slug": "laylat-al-qadr",
           "keyTakeaway": "Laylat al-Qadr is better than 1,000 months of worship. It is most likely in the last ten nights, and most probable on the odd nights among them.",
           "duration": 3,
-          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-05.m4a",
+          "audioPath": "/audio/learn/ramadan-fasting-essentials/module-05.mp3",
           "quizData": {
             "questions": [
               {
@@ -517,7 +517,7 @@
           "slug": "what-is-zakat",
           "keyTakeaway": "Zakat is the third pillar of Islam. It purifies wealth, redistributes surplus, and builds empathy between rich and poor.",
           "duration": 3,
-          "audioPath": "/audio/learn/zakat-made-simple/module-01.m4a",
+          "audioPath": "/audio/learn/zakat-made-simple/module-01.mp3",
           "quizData": {
             "questions": [
               {
@@ -541,7 +541,7 @@
           "slug": "nisab-and-timing",
           "keyTakeaway": "Nisab is approximately 85g of gold or 595g of silver. Once you reach nisab and hold it for one lunar year, Zakat becomes due.",
           "duration": 3,
-          "audioPath": "/audio/learn/zakat-made-simple/module-02.m4a",
+          "audioPath": "/audio/learn/zakat-made-simple/module-02.mp3",
           "quizData": {
             "questions": [
               {
@@ -565,7 +565,7 @@
           "slug": "zakatable-wealth",
           "keyTakeaway": "Cash, gold, silver, business inventory, and investments are zakatable. Personal items, your home, car, and furniture are not.",
           "duration": 3,
-          "audioPath": "/audio/learn/zakat-made-simple/module-03.m4a",
+          "audioPath": "/audio/learn/zakat-made-simple/module-03.mp3",
           "quizData": {
             "questions": [
               {
@@ -589,7 +589,7 @@
           "slug": "calculating-zakat",
           "keyTakeaway": "Add all zakatable assets, subtract immediate debts and one month's expenses, check if the remainder reaches nisab, then pay 2.5%.",
           "duration": 3,
-          "audioPath": "/audio/learn/zakat-made-simple/module-04.m4a",
+          "audioPath": "/audio/learn/zakat-made-simple/module-04.mp3",
           "quizData": {
             "questions": [
               {
@@ -613,7 +613,7 @@
           "slug": "eight-categories-recipients",
           "keyTakeaway": "The Quran specifies exactly 8 categories who may receive Zakat. Paying outside these categories invalidates your Zakat unless a legitimate shar'i reason exists.",
           "duration": 3,
-          "audioPath": "/audio/learn/zakat-made-simple/module-05.m4a",
+          "audioPath": "/audio/learn/zakat-made-simple/module-05.mp3",
           "quizData": {
             "questions": [
               {
@@ -652,7 +652,7 @@
           "slug": "obligation-types-pilgrimage",
           "keyTakeaway": "Hajj is obligatory once in a lifetime for those who are able. Umrah is recommended and can be performed any time of year.",
           "duration": 3,
-          "audioPath": "/audio/learn/hajj-umrah-guide/module-01.m4a",
+          "audioPath": "/audio/learn/hajj-umrah-guide/module-01.mp3",
           "quizData": {
             "questions": [
               {
@@ -676,7 +676,7 @@
           "slug": "ihram-and-miqat",
           "keyTakeaway": "Ihram begins at the miqat with intention and talbiyah. Once in ihram, normal activities like cutting hair, using perfume, and marital relations are forbidden until the rites are complete.",
           "duration": 3,
-          "audioPath": "/audio/learn/hajj-umrah-guide/module-02.m4a",
+          "audioPath": "/audio/learn/hajj-umrah-guide/module-02.mp3",
           "quizData": {
             "questions": [
               {
@@ -700,7 +700,7 @@
           "slug": "tawaf-and-sai",
           "keyTakeaway": "Tawaf is circumambulating the Ka'bah seven times. Sa'i is walking between Safa and Marwah seven times. Both are pillars of Umrah and Hajj.",
           "duration": 3,
-          "audioPath": "/audio/learn/hajj-umrah-guide/module-03.m4a",
+          "audioPath": "/audio/learn/hajj-umrah-guide/module-03.mp3",
           "quizData": {
             "questions": [
               {
@@ -724,7 +724,7 @@
           "slug": "arafat-and-mina",
           "keyTakeaway": "Standing at Arafat on the 9th of Dhul-Hijjah is the essence of Hajj. Missing it invalidates the Hajj. The days of Mina follow, with stoning, sacrifice, and shaving.",
           "duration": 3,
-          "audioPath": "/audio/learn/hajj-umrah-guide/module-04.m4a",
+          "audioPath": "/audio/learn/hajj-umrah-guide/module-04.mp3",
           "quizData": {
             "questions": [
               {
@@ -748,7 +748,7 @@
           "slug": "umrah-step-by-step",
           "keyTakeaway": "Umrah can be completed in a few hours: ihram at miqat, Tawaf, Sa'i, and shaving/cutting hair. Plan logistics and avoid common errors.",
           "duration": 3,
-          "audioPath": "/audio/learn/hajj-umrah-guide/module-05.m4a",
+          "audioPath": "/audio/learn/hajj-umrah-guide/module-05.mp3",
           "quizData": {
             "questions": [
               {
@@ -769,4 +769,4 @@
       ]
     }
   ]
-}
+}

scripts/generate-tts-local.js

@@ -46,7 +46,7 @@ function stripMarkdown(text) {
 }
 
 function generateSayM4a(text, outputPath) {
-  const tmpTxt = outputPath.replace('.m4a', '.txt');
+  const tmpTxt = outputPath.replace(path.extname(outputPath), '.txt');
   fs.writeFileSync(tmpTxt, text, 'utf-8');
   try {
     // macOS say outputs AAC in .m4a directly with --file-format m4af