app/src/app.js

@@ -362,51 +362,37 @@ app.delete('/api/payment-presets/:id', requireAuth, async (req, res, next) => {
     }
 });
 
-const signaturePresetResponse = (row) => ({
+app.get('/api/signature', requireAuth, async (req, res, next) => {
-    id: row.id,
-    name: row.name,
-    dataUrl: row.data_url
-});
-
-app.get('/api/signature-presets', requireAuth, async (req, res, next) => {
     try {
-        const result = await pool.query(
+        const result = await pool.query('SELECT * FROM signature_profiles WHERE user_id = $1', [req.userId]);
-            'SELECT * FROM signature_presets WHERE user_id = $1 ORDER BY name',
+        res.json({ signature: result.rowCount ? result.rows[0].data_url : null });
-            [req.userId]
-        );
-        res.json({ presets: result.rows.map(signaturePresetResponse) });
     } catch (error) {
         next(error);
     }
 });
 
-app.post('/api/signature-presets', requireAuth, async (req, res, next) => {
+app.put('/api/signature', requireAuth, async (req, res, next) => {
     try {
-        const name = String(req.body.name || '').trim();
         const dataUrl = req.body.dataUrl;
-        if (!name) {
-            res.status(400).json({ error: 'Zadejte název podpisu.' });
-            return;
-        }
         if (!isValidSignatureDataUrl(dataUrl)) {
             res.status(400).json({ error: 'Podpis musí být platný obrázek JPG nebo PNG.' });
             return;
         }
         const result = await pool.query(`
-            INSERT INTO signature_presets (user_id, name, data_url)
+            INSERT INTO signature_profiles (user_id, data_url)
-            VALUES ($1, $2, $3)
+            VALUES ($1, $2)
-            ON CONFLICT (user_id, name) DO UPDATE SET data_url = EXCLUDED.data_url
+            ON CONFLICT (user_id) DO UPDATE SET data_url = EXCLUDED.data_url
             RETURNING *
-        `, [req.userId, name, dataUrl]);
+        `, [req.userId, dataUrl]);
-        res.status(201).json({ preset: signaturePresetResponse(result.rows[0]) });
+        res.json({ signature: result.rows[0].data_url });
     } catch (error) {
         next(error);
     }
 });
 
-app.delete('/api/signature-presets/:id', requireAuth, async (req, res, next) => {
+app.delete('/api/signature', requireAuth, async (req, res, next) => {
     try {
-        await pool.query('DELETE FROM signature_presets WHERE id = $1 AND user_id = $2', [req.params.id, req.userId]);
+        await pool.query('DELETE FROM signature_profiles WHERE user_id = $1', [req.userId]);
         res.status(204).end();
     } catch (error) {
         next(error);

app/src/db.js

@@ -90,10 +90,21 @@ const initializeDatabase = () => {
                 UNIQUE (user_id, name)
             );
 
+            CREATE TABLE IF NOT EXISTS signature_profiles (
+                user_id INTEGER PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+                data_url TEXT NOT NULL
+            );
+
             ALTER TABLE supplier_profiles ADD COLUMN IF NOT EXISTS nazev_spolecnosti TEXT NOT NULL DEFAULT '';
             ALTER TABLE supplier_profiles ADD COLUMN IF NOT EXISTS typ_subjektu TEXT NOT NULL DEFAULT 'osoba';
             ALTER TABLE clients ADD COLUMN IF NOT EXISTS nazev_spolecnosti TEXT NOT NULL DEFAULT '';
             ALTER TABLE clients ADD COLUMN IF NOT EXISTS typ_subjektu TEXT NOT NULL DEFAULT 'osoba';
+
+            INSERT INTO signature_profiles (user_id, data_url)
+                SELECT DISTINCT ON (user_id) user_id, data_url
+                FROM signature_presets
+                ORDER BY user_id, created_at DESC
+            ON CONFLICT (user_id) DO NOTHING;
         `).catch((error) => {
             schemaPromise = undefined;
             throw error;

app/src/static/index.html

@@ -338,26 +338,19 @@
                 <div class="form-chapter signature-row">
                     <div class="form-group signature-group">
                         <label for="signatureInput">Podpis (nepovinné)</label>
-                        <div class="form-group">
-                            <label for="signaturePresetSelect">Uložený podpis</label>
-                            <select id="signaturePresetSelect">
-                                <option value="">Vyberte podpis</option>
-                            </select>
-                        </div>
                         <div id="signatureDropzone" class="signature-dropzone" tabindex="0" role="button" aria-label="Nahrát podpis kliknutím nebo přetažením souboru">
                             <img id="signaturePreview" class="signature-preview" alt="Náhled podpisu" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=" hidden />
                             <p id="signatureDropzoneText" class="signature-dropzone-text">Přetáhněte sem obrázek podpisu (420×210 px, JPG nebo PNG) nebo klikněte pro výběr souboru</p>
                             <input type="file" id="signatureInput" accept="image/png,image/jpeg" hidden />
                         </div>
-                        <div class="signature-save-row">
-                            <input id="signaturePresetName" type="text" placeholder="Název podpisu" aria-label="Název podpisu" />
-                            <button type="button" id="saveSignaturePresetButton">Uložit podpis</button>
-                            <button type="button" id="deleteSignaturePresetButton" class="secondary-button" disabled>Smazat</button>
-                        </div>
                         <div class="signature-actions">
                             <button type="button" id="removeSignatureButton" class="secondary-button" hidden>Odstranit podpis</button>
                         </div>
-                        <p id="signatureStatus" class="signature-status" role="status" aria-live="polite"></p>
+                        <div class="saved-data-actions">
+                            <button type="button" id="saveSignatureButton">Uložit podpis</button>
+                            <button type="button" id="loadSignatureButton" class="secondary-button">Načíst uložený</button>
+                            <span id="signatureStatus" class="signature-status" role="status" aria-live="polite"></span>
+                        </div>
                     </div>
                 </div>
 

app/src/static/script.js

@@ -57,10 +57,8 @@ const signaturePreview = document.getElementById("signaturePreview");
 const signatureDropzoneText = document.getElementById("signatureDropzoneText");
 const removeSignatureButton = document.getElementById("removeSignatureButton");
 const signatureStatus = document.getElementById("signatureStatus");
-const signaturePresetSelect = document.getElementById("signaturePresetSelect");
+const saveSignatureButton = document.getElementById("saveSignatureButton");
-const signaturePresetName = document.getElementById("signaturePresetName");
+const loadSignatureButton = document.getElementById("loadSignatureButton");
-const saveSignaturePresetButton = document.getElementById("saveSignaturePresetButton");
-const deleteSignaturePresetButton = document.getElementById("deleteSignaturePresetButton");
 const loadPaymentPresetButton = document.getElementById("loadPaymentPresetButton");
 const deletePaymentPresetButton = document.getElementById("deletePaymentPresetButton");
 
@@ -82,7 +80,6 @@ let itemIndex = 0;
 let clients = [];
 let invoices = [];
 let paymentPresets = [];
-let signaturePresets = [];
 let currentInvoiceId = null;
 let isRegistrationMode = false;
 let signatureDataUrl = null;
@@ -110,22 +107,31 @@ const applySignaturePreview = (dataUrl) => {
     }
 };
 
-const renderSignaturePresetOptions = (selectedId = signaturePresetSelect.value) => {
+const saveSignature = async () => {
-    signaturePresetSelect.innerHTML = "<option value=\"\">Vyberte podpis</option>";
+    if (!signatureDataUrl) {
-    signaturePresets.forEach((preset) => {
+        setSignatureStatus("Nejprve nahrajte podpis.", true);
-        const option = document.createElement("option");
+        return;
-        option.value = preset.id;
+    }
-        option.textContent = preset.name;
+    try {
-        signaturePresetSelect.appendChild(option);
+        await apiRequest("/api/signature", {
-    });
+            method: "PUT",
-    signaturePresetSelect.value = selectedId;
+            body: JSON.stringify({ dataUrl: signatureDataUrl })
-    deleteSignaturePresetButton.disabled = !signaturePresetSelect.value;
+        });
+        setSignatureStatus("Podpis byl uložen.");
+    } catch (error) {
+        setSignatureStatus(error.message, true);
+    }
 };
 
-const loadSignaturePresets = async () => {
+const loadSignature = async () => {
-    const response = await apiRequest("/api/signature-presets");
+    const { signature } = await apiRequest("/api/signature");
-    signaturePresets = response.presets;
+    if (signature) {
-    renderSignaturePresetOptions();
+        applySignaturePreview(signature);
+        setSignatureStatus("Uloženo na serveru");
+        return true;
+    }
+    setSignatureStatus("Zatím není uložený podpis");
+    return false;
 };
 
 const readImageDimensions = (dataUrl) => new Promise((resolve, reject) => {
@@ -185,49 +191,11 @@ signatureInput.addEventListener("change", () => {
     handleSignatureFile(signatureInput.files[0]);
     signatureInput.value = "";
 });
-signaturePresetSelect.addEventListener("change", () => {
+saveSignatureButton.addEventListener("click", saveSignature);
-    const preset = signaturePresets.find(({ id }) => String(id) === signaturePresetSelect.value);
+loadSignatureButton.addEventListener("click", async () => {
-    deleteSignaturePresetButton.disabled = !preset;
-    if (preset) {
-        signaturePresetName.value = preset.name;
-        applySignaturePreview(preset.dataUrl);
-        setSignatureStatus("Uložený podpis načten.");
-    }
-});
-saveSignaturePresetButton.addEventListener("click", async () => {
-    if (!signatureDataUrl) {
-        setSignatureStatus("Nejprve nahrajte nebo vyberte podpis.", true);
-        return;
-    }
     try {
-        const response = await apiRequest("/api/signature-presets", {
+        await loadSignature();
-            method: "POST",
+        setSignatureStatus("Podpis načten.");
-            body: JSON.stringify({
-                name: signaturePresetName.value,
-                dataUrl: signatureDataUrl
-            })
-        });
-        const preset = response.preset;
-        signaturePresets = [
-            ...signaturePresets.filter((entry) => entry.id !== preset.id && entry.name !== preset.name),
-            preset
-        ].sort((left, right) => left.name.localeCompare(right.name));
-        renderSignaturePresetOptions(String(preset.id));
-        signaturePresetName.value = preset.name;
-        setSignatureStatus("Podpis byl uložen.");
-    } catch (error) {
-        setSignatureStatus(error.message, true);
-    }
-});
-deleteSignaturePresetButton.addEventListener("click", async () => {
-    if (!signaturePresetSelect.value) {
-        return;
-    }
-    try {
-        await apiRequest(`/api/signature-presets/${signaturePresetSelect.value}`, { method: "DELETE" });
-        signaturePresets = signaturePresets.filter(({ id }) => String(id) !== signaturePresetSelect.value);
-        signaturePresetName.value = "";
-        renderSignaturePresetOptions();
     } catch (error) {
         setSignatureStatus(error.message, true);
     }
@@ -448,9 +416,6 @@ const clearInvoiceEditor = () => {
     paymentPresetSelect.value = "";
     paymentPresetName.value = "";
     deletePaymentPresetButton.disabled = true;
-    signaturePresetSelect.value = "";
-    signaturePresetName.value = "";
-    deleteSignaturePresetButton.disabled = true;
     ["cisloUctu", "iban", "swift"].forEach((id) => {
         document.getElementById(id).value = "";
     });
@@ -480,9 +445,6 @@ const loadInvoiceIntoEditor = (invoice) => {
         document.getElementById(id).value = invoice.data.payment?.[id] || "";
     });
     applySignaturePreview(invoice.data.signature || null);
-    signaturePresetSelect.value = "";
-    signaturePresetName.value = "";
-    deleteSignaturePresetButton.disabled = true;
     setSignatureStatus("");
     itemsContainer.replaceChildren();
     itemIndex = 0;
@@ -521,8 +483,9 @@ const loadInvoices = async () => {
     renderInvoiceList();
 };
 
-const openNewInvoice = () => {
+const openNewInvoice = async () => {
     clearInvoiceEditor();
+    await loadSignature();
     showInvoiceScreen("editor");
 };
 
@@ -709,7 +672,7 @@ deleteClientButton.addEventListener("click", async () => {
 const showInvoiceApp = async () => {
     authScreen.hidden = true;
     document.getElementById("main-container").hidden = false;
-    await Promise.all([loadSupplier(), loadClients(), loadInvoices(), loadPaymentPresets(), loadSignaturePresets(), loadNumberingSettings()]);
+    await Promise.all([loadSupplier(), loadClients(), loadInvoices(), loadPaymentPresets(), loadSignature(), loadNumberingSettings()]);
     showInvoiceScreen("list");
 };
 

app/src/static/style.css

@@ -682,56 +682,6 @@ body {
     margin-top: 0.5rem;
 }
 
-.signature-save-row {
-    display: grid;
-    grid-template-columns: minmax(0, 1fr) auto auto;
-    gap: 0.5rem;
-    margin-top: 0.75rem;
-}
-
-.signature-save-row input {
-    min-width: 0;
-    padding: 0.55rem 0.7rem;
-    color: var(--ink);
-    background: #fff;
-    border: 1px solid #c8d0d5;
-    border-radius: 0.25rem;
-    font: inherit;
-}
-
-.signature-save-row button {
-    padding: 0.55rem 0.7rem;
-    color: var(--navy);
-    background: transparent;
-    border: 1px solid var(--blue);
-    border-radius: 0.25rem;
-    cursor: pointer;
-    font: inherit;
-    font-size: 0.85rem;
-    font-weight: 700;
-    white-space: nowrap;
-}
-
-.signature-save-row button:hover:not(:disabled) {
-    color: #fff;
-    background: var(--blue);
-}
-
-.signature-save-row .secondary-button {
-    color: #8c3c36;
-    border-color: #c47a72;
-}
-
-.signature-save-row .secondary-button:hover:not(:disabled) {
-    color: #fff;
-    background: #a53c36;
-}
-
-.signature-save-row button:disabled {
-    cursor: not-allowed;
-    opacity: 0.45;
-}
-
 .signature-status {
     margin: 0.4rem 0 0;
     min-height: 1.1rem;
@@ -1013,10 +963,6 @@ select:focus {
         grid-template-columns: 1fr;
     }
 
-    .signature-save-row {
-        grid-template-columns: 1fr;
-    }
-
     .delete-item-button {
         justify-self: end;
     }