Add README, customization snapshot, and snapshot/restore tooling

Provisioning now restores all GUI customizations on reset+reprovision:

- create_pod_espocrm.sh: deploy the version-controlled espocrm-custom/ tree
  (CTag entity, layouts, i18n, clientDefs, custom views, custom CSS) into the
  pod, then chown www-data and rebuild. Replaces the earlier inline CSS-only
  step. Adds a live-phase cache rebuild so customizations and the client
  cacheTimestamp are refreshed on every run.
- espocrm-custom/: snapshot of custom/ and client/custom/ (source of truth).
- snapshot_espocrm_custom.sh: refresh the snapshot from a running pod.
- readme.md: usage, first-time host setup, image-update and reset workflows.
- Include the task/instruction notes and plan.md for reference.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

espocrm-custom/client/custom/css/table-var-col.css

@@ -0,0 +1,14 @@
+/**
+ * Variable column widths for Markdown tables in text fields.
+ *
+ * EspoCRM core CSS forces `table-layout: fixed; width: 100%` on
+ * `.complex-text table`, which makes all columns equally wide.
+ * `auto` lets columns size to content instead.
+ *
+ * Registered via custom/Espo/Custom/Resources/metadata/app/client.json (cssList).
+ */
+.complex-text table {
+    table-layout: auto !important;
+    width: auto !important;
+    max-width: 100% !important;
+}

espocrm-custom/client/custom/modules/dummy.txt

@@ -0,0 +1 @@
+dummy

espocrm-custom/client/custom/src/views/preferences/fields/signature.js

@@ -0,0 +1,24 @@
+define('custom:views/preferences/fields/signature',
+['views/preferences/fields/signature'], (SignatureFieldView) => {
+
+    return class extends SignatureFieldView {
+
+        setupToolbar() {
+            // Build the reduced signature toolbar first …
+            super.setupToolbar();
+
+            // … then re-add the image button next to the link button.
+            this.toolbar = (this.toolbar || []).map(group => {
+                if (Array.isArray(group) && group[0] === 'table') {
+                    const buttons = group[1] || [];
+
+                    if (!buttons.includes('espoImage')) {
+                        return ['table', [...buttons, 'espoImage']];
+                    }
+                }
+
+                return group;
+            });
+        }
+    };
+});

espocrm-custom/client/custom/src/views/record/row-actions/tags-unlink-only.js

@@ -0,0 +1,28 @@
+define('custom:views/record/row-actions/tags-unlink-only',
+['views/record/row-actions/relationship'], (RelationshipRowActionsView) => {
+
+    return class extends RelationshipRowActionsView {
+
+        getActionList() {
+            const list = [];
+
+            // Keep only the "Unlink" action (German UI: "Link entfernen").
+            // View / Edit / Remove are intentionally omitted.
+            if (!this.options.unlinkDisabled) {
+                list.push({
+                    action: 'unlinkRelated',
+                    label: 'Unlink',
+                    data: {
+                        id: this.model.id,
+                    },
+                    groupIndex: 0,
+                });
+            }
+
+            // Preserve any explicitly configured extra row actions (none by default).
+            this.getAdditionalActionList().forEach(item => list.push(item));
+
+            return list;
+        }
+    };
+});