diff --git a/backend/.coverage b/backend/.coverage
new file mode 100644
index 0000000..3d03f1a
Binary files /dev/null and b/backend/.coverage differ
diff --git a/frontend-client/src/lib/components/Header.svelte b/frontend-client/src/lib/components/Header.svelte
index dc60c02..c810bd7 100644
--- a/frontend-client/src/lib/components/Header.svelte
+++ b/frontend-client/src/lib/components/Header.svelte
@@ -59,7 +59,6 @@
             <button
               on:click={toggleMenu}
               class="flex items-center space-x-2 text-gray-700 hover:text-primary-600 focus:outline-none focus:ring-2 focus:ring-primary-500 focus:ring-offset-2 rounded-md p-2"
-              role="button"
               tabindex="0"
               on:keydown={(e) => e.key === 'Enter' && toggleMenu()}
             >
diff --git a/frontend-client/src/routes/+page.svelte b/frontend-client/src/routes/+page.svelte
index c533875..1e6d7cf 100644
--- a/frontend-client/src/routes/+page.svelte
+++ b/frontend-client/src/routes/+page.svelte
@@ -174,5 +174,6 @@
     -webkit-line-clamp: 2;
     -webkit-box-orient: vertical;
     overflow: hidden;
+    line-clamp: 2; /* Propiedad estándar para compatibilidad */
   }
 </style>
\ No newline at end of file
diff --git a/frontend-client/src/routes/login/+page.svelte b/frontend-client/src/routes/login/+page.svelte
index 33b9880..8a2c6a0 100644
--- a/frontend-client/src/routes/login/+page.svelte
+++ b/frontend-client/src/routes/login/+page.svelte
@@ -214,7 +214,6 @@
                    maxlength="6"
                    required
                    disabled={isLoading}
-                   autofocus
                  />
                </div>
              </div>
diff --git a/frontend-client/src/routes/profile/+page.svelte b/frontend-client/src/routes/profile/+page.svelte
index 154da75..e02feec 100644
--- a/frontend-client/src/routes/profile/+page.svelte
+++ b/frontend-client/src/routes/profile/+page.svelte
@@ -461,8 +461,9 @@
               <h3 class="font-medium text-gray-900 mb-4">Información General</h3>
               <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                 <div>
-                  <label class="form-label">Razón Social</label>
+                  <label class="form-label" for="business_name">Razón Social</label>
                   <input
+                    id="business_name"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.business_name}
@@ -471,8 +472,9 @@
                 </div>
 
                 <div>
-                  <label class="form-label">Nombre Comercial</label>
+                  <label class="form-label" for="commercial_name">Nombre Comercial</label>
                   <input
+                    id="commercial_name"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.commercial_name}
@@ -481,8 +483,9 @@
                 </div>
 
                 <div>
-                  <label class="form-label">Clave de Cliente</label>
+                  <label class="form-label" for="client_code">Clave de Cliente</label>
                   <input
+                    id="client_code"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.client_code}
@@ -491,7 +494,7 @@
                 </div>
 
                 <div>
-                  <label class="form-label">Tipo de Cliente</label>
+                  <label class="form-label" for="client_type">Tipo de Cliente</label>
                   <select class="form-input" bind:value={businessProfile.client_type}>
                     <option value="">Seleccionar...</option>
                     <option value="corporativo">Corporativo</option>
@@ -503,8 +506,9 @@
                 </div>
 
                 <div>
-                  <label class="form-label">RFC</label>
+                  <label class="form-label" for="rfc">RFC</label>
                   <input
+                    id="rfc"
                     type="text"
                     class="form-input {businessProfileErrors.rfc ? 'border-red-300' : ''}"
                     bind:value={businessProfile.rfc}
@@ -518,8 +522,9 @@
                 </div>
 
                 <div>
-                  <label class="form-label">ID Fiscal (Otros países)</label>
+                  <label class="form-label" for="tax_id">ID Fiscal (Otros países)</label>
                   <input
+                    id="tax_id"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.tax_id}
@@ -619,8 +624,9 @@
               <h3 class="font-medium text-gray-900 mb-4">Representantes</h3>
               <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                 <div>
-                  <label class="form-label">Encargado/Representante</label>
+                  <label class="form-label" for="company_representative">Encargado/Representante</label>
                   <input
+                    id="company_representative"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.company_representative}
@@ -629,8 +635,9 @@
                 </div>
 
                 <div>
-                  <label class="form-label">Representante Legal</label>
+                  <label class="form-label" for="legal_representative">Representante Legal</label>
                   <input
+                    id="legal_representative"
                     type="text"
                     class="form-input"
                     bind:value={businessProfile.legal_representative}
@@ -645,7 +652,7 @@
               <h3 class="font-medium text-gray-900 mb-4">Configuración</h3>
               <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                 <div>
-                  <label class="form-label">Moneda Preferida</label>
+                  <label class="form-label" for="preferred_currency">Moneda Preferida</label>
                   <select class="form-input" bind:value={businessProfile.preferred_currency}>
                     <option value="MXN">MXN - Peso Mexicano</option>
                     <option value="USD">USD - Dólar Americano</option>
@@ -654,12 +661,12 @@
                 </div>
 
                 <div>
-                  <label class="form-label">Nacionalidad</label>
+                  <label class="form-label" for="nationality">Nacionalidad</label>
                   <input type="text" class="form-input" bind:value={businessProfile.nationality} />
                 </div>
 
                 <div class="md:col-span-2">
-                  <label class="form-label">Notas Adicionales</label>
+                  <label class="form-label" for="notes">Notas Adicionales</label>
                   <textarea
                     class="form-input"
                     rows="3"
diff --git a/frontend-client/src/routes/tickets/[id]/+page.svelte b/frontend-client/src/routes/tickets/[id]/+page.svelte
index 18de429..4af9249 100644
--- a/frontend-client/src/routes/tickets/[id]/+page.svelte
+++ b/frontend-client/src/routes/tickets/[id]/+page.svelte
@@ -473,7 +473,7 @@
 {#if showCloseDialog}
   <div class="fixed inset-0 z-50 overflow-y-auto">
     <div class="flex items-center justify-center min-h-screen pt-4 px-4 pb-20 text-center sm:block sm:p-0">
-      <div class="fixed inset-0 transition-opacity" on:click={cancelCloseTicket}>
+      <div class="fixed inset-0 transition-opacity" role="dialog" tabindex="0" on:click={cancelCloseTicket} on:keydown={(e) => e.key === 'Escape' && cancelCloseTicket()}>
         <div class="absolute inset-0 bg-gray-500 opacity-75"></div>
       </div>
       
diff --git a/frontend-client/tsconfig.json b/frontend-client/tsconfig.json
index df7e239..aa6c445 100644
--- a/frontend-client/tsconfig.json
+++ b/frontend-client/tsconfig.json
@@ -18,7 +18,8 @@
             "DOM.Iterable"
         ],
         "allowSyntheticDefaultImports": true,
-        "isolatedModules": true
+        "isolatedModules": true,
+        "verbatimModuleSyntax": true
     },
     "include": [
         "src/**/*",
diff --git a/frontend-internal/src/lib/components/Header.svelte b/frontend-internal/src/lib/components/Header.svelte
index de687f3..311bf32 100644
--- a/frontend-internal/src/lib/components/Header.svelte
+++ b/frontend-internal/src/lib/components/Header.svelte
@@ -84,6 +84,9 @@
 {#if isMenuOpen}
   <div 
     class="fixed inset-0 z-40 lg:hidden" 
+    role="dialog" 
+    tabindex="0" 
     on:click={() => isMenuOpen = false}
+    on:keydown={(e) => e.key === 'Escape' && (isMenuOpen = false)}
   ></div>
 {/if}
\ No newline at end of file
diff --git a/frontend-internal/src/lib/components/Sidebar.svelte b/frontend-internal/src/lib/components/Sidebar.svelte
index 6f33e7a..4815426 100644
--- a/frontend-internal/src/lib/components/Sidebar.svelte
+++ b/frontend-internal/src/lib/components/Sidebar.svelte
@@ -78,7 +78,7 @@
 <!-- Mobile sidebar backdrop -->
 {#if open}
   <div class="fixed inset-0 z-40 lg:hidden">
-    <div class="fixed inset-0 bg-gray-600 bg-opacity-75" on:click={() => open = false}></div>
+    <div class="fixed inset-0 bg-gray-600 bg-opacity-75" role="dialog" tabindex="0" on:click={() => open = false} on:keydown={(e) => e.key === 'Escape' && (open = false)}></div>
   </div>
 {/if}
 
diff --git a/frontend-internal/tsconfig.json b/frontend-internal/tsconfig.json
index df7e239..aa6c445 100644
--- a/frontend-internal/tsconfig.json
+++ b/frontend-internal/tsconfig.json
@@ -18,7 +18,8 @@
             "DOM.Iterable"
         ],
         "allowSyntheticDefaultImports": true,
-        "isolatedModules": true
+        "isolatedModules": true,
+        "verbatimModuleSyntax": true
     },
     "include": [
         "src/**/*",