Fix: SIGNATURE_BLOCK placeholder and cached content issue

ISSUE 1: {{SIGNATURE_BLOCK}} placeholder not working
- Signature extraction was using wrong end markers
- Start: 'Signature of Consultant'
- End: 'Signature of Medical Officer', 'Signature of Receiver / Date'
- Problem: All three texts are in SAME table row
- Extraction cut off too early (found end marker immediately after start)

FIX: Remove end markers for signature block extraction
- Signature table is LAST element in content
- Extract from 'Signature of Consultant' to end of content
- Now captures entire signature table correctly

ISSUE 2: Other Advice not showing in PDF
- Cached content was generated BEFORE 'Other Advice:' label was added
- Database has data but cached HTML doesn't include label

FIX: Created cache clearing utility
- clear_discharge_cache.php script
- Clears cached content for specified IPD
- Forces regeneration with new labels

DEBUG TOOLS ADDED:
- debug_discharge_content.php - Check what's in cached content
- clear_discharge_cache.php - Clear cache to force regeneration

TESTING:
1. php clear_discharge_cache.php 1
2. Visit /Ipd_discharge/preview_discharge_report/1?regen=1
3. Verify PDF shows Other Advice: and Discharge Summary: labels
4. Verify {{SIGNATURE_BLOCK}} placeholder works in templates

app/Controllers/Ipd_discharge.php

@@ -566,7 +566,8 @@ class Ipd_discharge extends BaseController
         $dischargeInstructions = $section(['Discharge Advice/Instructions/Summary']);
         $drugAllergyAdr = $section(['Drug Allergy / ADR']);
         $coMorbidities = $section(['Co-Morbidities']);
-        $signatureBlock = $section(['Signature of Consultant'], ['Signature of Medical Officer', 'Signature of Receiver / Date']);
+        // Extract entire signature table - no end markers (it's the last section)
+        $signatureBlock = $section(['Signature of Consultant'], []);
         
         // Extract individual instruction fields for template flexibility
         $otherAdvice = $section(['Other Advice:']);

clear_discharge_cache.php

@@ -0,0 +1,45 @@
+<?php
+// Clear discharge cache to force regeneration
+$envFile = __DIR__ . '/.env';
+$dbHost = 'localhost';
+$dbUser = 'root';
+$dbPass = '';
+$dbName = 'hms_data_ci4';
+
+$lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+foreach ($lines as $line) {
+    if (strpos($line, 'database.default.hostname') !== false) {
+        $dbHost = trim(explode('=', $line, 2)[1] ?? 'localhost');
+    } elseif (strpos($line, 'database.default.username') !== false) {
+        $dbUser = trim(explode('=', $line, 2)[1] ?? 'root');
+    } elseif (strpos($line, 'database.default.password') !== false) {
+        $dbPass = trim(explode('=', $line, 2)[1] ?? '');
+    } elseif (strpos($line, 'database.default.database') !== false) {
+        $dbName = trim(explode('=', $line, 2)[1] ?? 'hms_data_ci4');
+    }
+}
+
+$conn = new mysqli($dbHost, $dbUser, $dbPass, $dbName);
+if ($conn->connect_error) {
+    die("ERROR: Connection failed: " . $conn->connect_error . "\n");
+}
+
+$ipdId = isset($argv[1]) ? intval($argv[1]) : 1;
+
+echo "=== Clearing discharge cache for IPD ID: {$ipdId} ===\n\n";
+
+$stmt = $conn->prepare("DELETE FROM ipd_discharge WHERE ipd_id = ?");
+$stmt->bind_param("i", $ipdId);
+
+if ($stmt->execute()) {
+    echo "✅ Cleared cached content for IPD ID {$ipdId}\n";
+    echo "Affected rows: " . $stmt->affected_rows . "\n\n";
+    echo "Now visit the discharge preview page to regenerate content with the new 'Other Advice:' label.\n";
+    echo "URL: /Ipd_discharge/preview_discharge_report/{$ipdId}?regen=1\n";
+} else {
+    echo "❌ Failed to clear: " . $stmt->error . "\n";
+}
+
+$stmt->close();
+$conn->close();
+echo "\n=== Done ===\n";

debug_discharge_content.php

@@ -0,0 +1,77 @@
+
+<?php
+// Debug script to check what's in the generated discharge content
+require 'vendor/autoload.php';
+
+$envFile = __DIR__ . '/.env';
+$dbHost = 'localhost';
+$dbUser = 'root';
+$dbPass = '';
+$dbName = 'hms_data_ci4';
+
+$lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+foreach ($lines as $line) {
+    if (strpos($line, 'database.default.hostname') !== false) {
+        $dbHost = trim(explode('=', $line, 2)[1] ?? 'localhost');
+    } elseif (strpos($line, 'database.default.username') !== false) {
+        $dbUser = trim(explode('=', $line, 2)[1] ?? 'root');
+    } elseif (strpos($line, 'database.default.password') !== false) {
+        $dbPass = trim(explode('=', $line, 2)[1] ?? '');
+    } elseif (strpos($line, 'database.default.database') !== false) {
+        $dbName = trim(explode('=', $line, 2)[1] ?? 'hms_data_ci4');
+    }
+}
+
+$conn = new mysqli($dbHost, $dbUser, $dbPass, $dbName);
+if ($conn->connect_error) {
+    die("ERROR: Connection failed: " . $conn->connect_error . "\n");
+}
+
+$ipdId = isset($argv[1]) ? intval($argv[1]) : 1;
+
+echo "=== Checking discharge content for IPD ID: {$ipdId} ===\n\n";
+
+// Check if cached content exists
+$stmt = $conn->prepare("SELECT content FROM ipd_discharge WHERE ipd_id = ? LIMIT 1");
+$stmt->bind_param("i", $ipdId);
+$stmt->execute();
+$result = $stmt->get_result();
+
+if ($row = $result->fetch_assoc()) {
+    $content = $row['content'];
+    echo "=== CACHED CONTENT FOUND ===\n\n";
+    
+    // Check for signature block
+    if (stripos($content, 'Signature of Consultant') !== false) {
+        echo "✅ 'Signature of Consultant' text FOUND in content\n";
+    } else {
+        echo "❌ 'Signature of Consultant' text NOT FOUND in content\n";
+    }
+    
+    // Check for Other Advice
+    if (stripos($content, 'Other Advice') !== false) {
+        echo "✅ 'Other Advice' text FOUND in content\n";
+    } else {
+        echo "❌ 'Other Advice' text NOT FOUND in content\n";
+    }
+    
+    // Check for Discharge Summary
+    if (stripos($content, 'Discharge Summary:') !== false) {
+        echo "✅ 'Discharge Summary:' label FOUND in content\n";
+    } else {
+        echo "❌ 'Discharge Summary:' label NOT FOUND in content\n";
+    }
+    
+    echo "\n=== CONTENT PREVIEW (first 2000 chars) ===\n";
+    echo substr($content, 0, 2000) . "\n...\n\n";
+    
+    echo "=== CONTENT PREVIEW (last 1000 chars) ===\n";
+    echo "..." . substr($content, -1000) . "\n\n";
+} else {
+    echo "No cached content found for IPD ID {$ipdId}\n";
+    echo "Content is generated on-demand. Try accessing the preview page first.\n";
+}
+
+$stmt->close();
+$conn->close();
+echo "=== Done ===\n";