fix: use relative API URLs so fetch works under blueprint prefix

app/tools/changelog_ai/templates/changelog_ai/index.html

@@ -309,7 +309,7 @@ refactor: clean up legacy charting utility"></textarea>
     btnDownloadPdf.classList.add('hidden');
 
     try {
-      const res = await fetch('/api/generate', {
+      const res = await fetch('api/generate', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json', 'X-CSRFToken': CSRF },
         body: JSON.stringify({

app/tools/git_narrator/templates/git_narrator/index.html

@@ -218,7 +218,7 @@ async function doNarrate() {
   }, 1400);
 
   try {
-    const res  = await fetch('/api/narrate', {
+    const res  = await fetch('api/narrate', {
       method:  'POST',
       headers: {'Content-Type':'application/json','X-CSRFToken':_csrf},
       body:    JSON.stringify({content: raw})

app/tools/schema_detective/templates/schema_detective/index.html

@@ -341,7 +341,7 @@ CREATE TABLE prescriptions (
     setAiStatus('working');
 
     try {
-      const res = await fetch('/api/analyze', {
+      const res = await fetch('api/analyze', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json', 'X-CSRFToken': CSRF },
         body: JSON.stringify({ schema })
@@ -497,7 +497,7 @@ CREATE TABLE prescriptions (
     fixLabel.textContent = 'Generating fixes...';
     setAiStatus('working');
     try {
-      const res = await fetch('/api/fix', {
+      const res = await fetch('api/fix', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json', 'X-CSRFToken': CSRF },
         body: JSON.stringify({ schema, findings: _lastFindings }),

app/tools/sql_whisperer/templates/sql_whisperer/index.html

@@ -234,7 +234,7 @@ async function generateSQL() {
   }, 1200);
 
   try {
-    const res  = await fetch('/api/whisper', {
+    const res  = await fetch('api/whisper', {
       method:  'POST',
       headers: {'Content-Type': 'application/json', 'X-CSRFToken': _csrf},
       body:    JSON.stringify({question, schema, dialect})

app/tools/test_forge/templates/test_forge/index.html

@@ -298,7 +298,7 @@
     setAiStatus('working');
 
     try {
-      const res = await fetch('/api/generate', {
+      const res = await fetch('api/generate', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json', 'X-CSRFToken': CSRF },
         body: JSON.stringify({