- Implemented the symptom database as a full searchable reference area, parallel to terminology.

Added:
New medical_symptoms SQLite catalog with 242 seeded symptom records, 
categories, body systems, tracking notes, urgency-context notes, search 
terms, and MedlinePlus links: [app/bootstrap.php (line 
186)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:186), 
[seed logic (line 
635)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:635)
New searchable symptom directory: [public/symptoms.php (line 
1)](/Users/tyemeclifford/Documents/GH/workout/public/symptoms.php:1)
New dynamic per-symptom page, e.g. /symptom.php?id=24: 
[public/symptom.php (line 
1)](/Users/tyemeclifford/Documents/GH/workout/public/symptom.php:1)
Symptom helper/link lookup functions: [app/bootstrap.php (line 
1473)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:1473)
medicalSymptoms added to the combined library search/API: 
[app/bootstrap.php (line 
2024)](/Users/tyemeclifford/Documents/GH/workout/app/bootstrap.php:2024)
Symptoms added to nav, homepage, and combined medical search: 
[site-header.php (line 
27)](/Users/tyemeclifford/Documents/GH/workout/public/partials/site-header.php:27), 
[index.php (line 
11)](/Users/tyemeclifford/Documents/GH/workout/public/index.php:11), 
[medical.php (line 
13)](/Users/tyemeclifford/Documents/GH/workout/public/medical.php:13)

public/symptoms.php

@@ -0,0 +1,72 @@
+<?php
+declare(strict_types=1);
+
+require __DIR__ . '/../app/bootstrap.php';
+$pdo = app_db();
+
+$pageTitle = 'Symptom Database | Neon Medical Tracker';
+$activePage = 'symptoms';
+$searchQuery = trim((string) ($_GET['q'] ?? ''));
+$library = library_search_payload(['q' => $searchQuery, 'limit' => 500]);
+$symptoms = $library['medicalSymptoms'];
+$totalSymptoms = (int) db_value($pdo, 'SELECT COUNT(*) FROM medical_symptoms');
+
+require __DIR__ . '/partials/site-header.php';
+?>
+<main>
+    <section class="admin-public-shell">
+        <div class="site-section-heading">
+            <p class="site-eyebrow">Symptom database</p>
+            <h1>Search symptoms by name, body system, tracking context, and urgency notes.</h1>
+            <p>These entries are reference summaries with MedlinePlus source links. They support tracking and discussion, not diagnosis or treatment decisions.</p>
+        </div>
+
+        <form class="library-search" method="get" action="/symptoms.php">
+            <label>
+                <span>Search symptoms</span>
+                <input name="q" value="<?= htmlspecialchars($searchQuery, ENT_QUOTES) ?>" placeholder="Try chest pain, rash, nausea, dizziness, urinary, sleep">
+            </label>
+            <button class="site-primary" type="submit">Search</button>
+            <?php if ($searchQuery !== ''): ?>
+                <a class="site-secondary" href="/symptoms.php">Clear</a>
+            <?php endif; ?>
+        </form>
+
+        <div class="library-stats" aria-label="Symptom result count">
+            <article><strong><?= count($symptoms) ?></strong><span><?= $searchQuery === '' ? 'shown of ' . number_format($totalSymptoms) . ' symptoms' : 'symptom results' ?></span></article>
+        </div>
+    </section>
+
+    <section class="admin-public-shell">
+        <div class="site-section-heading">
+            <p class="site-eyebrow">Catalog directory</p>
+            <h2>Symptom records</h2>
+        </div>
+
+        <?php if (!$symptoms): ?>
+            <article class="empty-state">
+                <h3>No symptoms found.</h3>
+                <p>Try a body system, symptom name, sign, or tracking phrase.</p>
+            </article>
+        <?php else: ?>
+            <div class="library-list">
+                <?php foreach ($symptoms as $symptom): ?>
+                    <article class="library-row">
+                        <div class="library-row-main">
+                            <h3><?= htmlspecialchars((string) $symptom['name'], ENT_QUOTES) ?></h3>
+                            <p><?= htmlspecialchars((string) $symptom['plain_language_description'], ENT_QUOTES) ?></p>
+                            <div class="library-row-meta">
+                                <span><?= htmlspecialchars((string) $symptom['category'], ENT_QUOTES) ?></span>
+                                <span><?= htmlspecialchars((string) ($symptom['body_system'] ?: 'Symptom'), ENT_QUOTES) ?></span>
+                            </div>
+                        </div>
+                        <div class="library-row-actions">
+                            <a class="site-primary" href="<?= htmlspecialchars(symptom_detail_path($symptom), ENT_QUOTES) ?>">View symptom</a>
+                        </div>
+                    </article>
+                <?php endforeach; ?>
+            </div>
+        <?php endif; ?>
+    </section>
+</main>
+<?php require __DIR__ . '/partials/site-footer.php'; ?>