feat: add manual SD card data upload for offline NRLs; rename RecordingSession to MonitoringSession

- Add POST /api/projects/{project_id}/nrl/{location_id}/upload-data endpoint
  accepting a ZIP or multi-file select of .rnd/.rnh files from an SD card.
  Parses .rnh metadata for session start/stop times, serial number, and store
  name. Creates a MonitoringSession (no unit assignment required) and DataFile
  records for each measurement file.

- Add Upload Data button and collapsible upload panel to the NRL detail Data
  Files tab, with inline success/error feedback and automatic file list refresh
  via HTMX after import.

- Rename RecordingSession -> MonitoringSession throughout the codebase
  (models.py, projects.py, project_locations.py, scheduler.py, roster_rename.py,
  main.py, init_projects_db.py, scripts/rename_unit.py). DB table renamed from
  recording_sessions to monitoring_sessions; old indexes dropped and recreated.

- Update all template UI copy from Recording Sessions to Monitoring Sessions
  (nrl_detail, projects/detail, session_list, schedule_oneoff, roster).

- Add backend/migrate_rename_recording_to_monitoring_sessions.py for applying
  the table rename on production databases before deploying this build.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

templates/nrl_detail.html

@@ -80,7 +80,7 @@
         <button onclick="switchTab('sessions')"
                 data-tab="sessions"
                 class="tab-button px-4 py-3 border-b-2 border-transparent font-medium text-sm text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white hover:border-gray-300 dark:hover:border-gray-600 transition-colors">
-            Recording Sessions
+            Monitoring Sessions
         </button>
         <button onclick="switchTab('data')"
                 data-tab="data"
@@ -302,11 +302,11 @@
     </div>
     {% endif %}
 
-    <!-- Recording Sessions Tab -->
+    <!-- Monitoring Sessions Tab -->
     <div id="sessions-tab" class="tab-panel hidden">
         <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
             <div class="flex items-center justify-between mb-6">
-                <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Recording Sessions</h2>
+                <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Monitoring Sessions</h2>
                 {% if assigned_unit %}
                 <button onclick="openScheduleModal()"
                         class="px-4 py-2 bg-seismo-orange text-white rounded-lg hover:bg-seismo-navy transition-colors">
@@ -329,8 +329,40 @@
         <div class="bg-white dark:bg-slate-800 rounded-xl shadow-lg p-6">
             <div class="flex items-center justify-between mb-6">
                 <h2 class="text-xl font-semibold text-gray-900 dark:text-white">Data Files</h2>
-                <div class="text-sm text-gray-500">
-                    <span class="font-medium">{{ file_count }}</span> files
+                <div class="flex items-center gap-3">
+                    <span class="text-sm text-gray-500"><span class="font-medium">{{ file_count }}</span> files</span>
+                    <button onclick="toggleUploadPanel()"
+                            class="px-3 py-1.5 text-sm bg-seismo-orange text-white rounded-lg hover:bg-seismo-navy transition-colors flex items-center gap-1.5">
+                        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12"></path>
+                        </svg>
+                        Upload Data
+                    </button>
+                </div>
+            </div>
+
+            <!-- Upload Panel -->
+            <div id="upload-panel" class="hidden mb-6 p-4 border-2 border-dashed border-gray-300 dark:border-gray-600 rounded-xl bg-gray-50 dark:bg-gray-800/50">
+                <p class="text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">Upload SD Card Data</p>
+                <p class="text-xs text-gray-500 dark:text-gray-400 mb-3">
+                    Select a ZIP file, or select all files from inside an <code class="bg-gray-200 dark:bg-gray-700 px-1 rounded">Auto_####</code> folder. File types (.rnd, .rnh) are auto-detected.
+                </p>
+                <input type="file" id="upload-input" multiple
+                       accept=".zip,.rnd,.rnh,.RND,.RNH"
+                       class="block w-full text-sm text-gray-500 dark:text-gray-400
+                              file:mr-3 file:py-1.5 file:px-3 file:rounded-lg file:border-0
+                              file:text-sm file:font-medium file:bg-seismo-orange file:text-white
+                              hover:file:bg-seismo-navy file:cursor-pointer" />
+                <div class="flex items-center gap-3 mt-3">
+                    <button onclick="submitUpload()"
+                            class="px-4 py-1.5 text-sm bg-green-600 text-white rounded-lg hover:bg-green-700 transition-colors">
+                        Import Files
+                    </button>
+                    <button onclick="toggleUploadPanel()"
+                            class="px-4 py-1.5 text-sm text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white transition-colors">
+                        Cancel
+                    </button>
+                    <span id="upload-status" class="text-sm hidden"></span>
                 </div>
             </div>
 
@@ -559,5 +591,64 @@ document.getElementById('assign-modal')?.addEventListener('click', function(e) {
         closeAssignModal();
     }
 });
+
+// ── Upload Data ─────────────────────────────────────────────────────────────
+
+function toggleUploadPanel() {
+    const panel = document.getElementById('upload-panel');
+    const status = document.getElementById('upload-status');
+    panel.classList.toggle('hidden');
+    // Reset status when reopening
+    if (!panel.classList.contains('hidden')) {
+        status.textContent = '';
+        status.className = 'text-sm hidden';
+        document.getElementById('upload-input').value = '';
+    }
+}
+
+async function submitUpload() {
+    const input = document.getElementById('upload-input');
+    const status = document.getElementById('upload-status');
+
+    if (!input.files.length) {
+        alert('Please select files to upload.');
+        return;
+    }
+
+    const formData = new FormData();
+    for (const file of input.files) {
+        formData.append('files', file);
+    }
+
+    status.textContent = 'Uploading\u2026';
+    status.className = 'text-sm text-gray-500';
+
+    try {
+        const response = await fetch(
+            `/api/projects/${projectId}/nrl/${locationId}/upload-data`,
+            { method: 'POST', body: formData }
+        );
+        const data = await response.json();
+
+        if (response.ok) {
+            const parts = [`Imported ${data.files_imported} file${data.files_imported !== 1 ? 's' : ''}`];
+            if (data.leq_files || data.lp_files) {
+                parts.push(`(${data.leq_files} Leq, ${data.lp_files} Lp)`);
+            }
+            if (data.store_name) parts.push(`\u2014 ${data.store_name}`);
+            status.textContent = parts.join(' ');
+            status.className = 'text-sm text-green-600 dark:text-green-400';
+            input.value = '';
+            // Refresh the file list
+            htmx.trigger(document.getElementById('data-files-list'), 'load');
+        } else {
+            status.textContent = `Error: ${data.detail || 'Upload failed'}`;
+            status.className = 'text-sm text-red-600 dark:text-red-400';
+        }
+    } catch (err) {
+        status.textContent = `Error: ${err.message}`;
+        status.className = 'text-sm text-red-600 dark:text-red-400';
+    }
+}
 </script>
 {% endblock %}