fix(electrobun): wizard 7 fixes — validation, GitLab, SSHFS, icons, model dropdown, keyboard nav

- Git Platform: validates repo via git.probe before enabling Next, supports GitHub + GitLab + any git URL
- Template dir configurable in Advanced Settings (template_dir key)
- SSHFS: checks sshfs availability, mountpoint selector when enabled
- CustomDropdown: flip-up when insufficient space below
- 50 Lucide icons (was 24) with categories (AI, Data, DevOps, Security, Media, Comms)
- Model: CustomDropdown from live API, max_tokens as slider, effort only with adaptive thinking
- Keyboard: Escape closes wizard, Tab navigation with :focus-visible rings, source cards navigable

ui-electrobun/src/mainview/settings/AdvancedSettings.svelte

@@ -17,6 +17,7 @@
   let otlpEndpoint   = $state('');
   let relayUrls      = $state('');
   let connTimeout    = $state(30);
+  let templateDir    = $state('~/.config/agor/templates/');
 
   let appVersion     = $state('...');
   let updateChecking = $state(false);
@@ -32,6 +33,7 @@
   function setOtlp(v: string)        { otlpEndpoint = v;  persist('otlp_endpoint', v); }
   function setRelayUrls(v: string)   { relayUrls = v;     persist('relay_urls', v); }
   function setConnTimeout(v: number) { connTimeout = v;   persist('connection_timeout', String(v)); }
+  function setTemplateDir(v: string)  { templateDir = v;  persist('template_dir', v); }
 
   function togglePlugin(id: string) {
     plugins = plugins.map(p => p.id === id ? { ...p, enabled: !p.enabled } : p);
@@ -107,6 +109,7 @@
     if (settings['otlp_endpoint'])      otlpEndpoint = settings['otlp_endpoint'];
     if (settings['relay_urls'])         relayUrls    = settings['relay_urls'];
     if (settings['connection_timeout']) connTimeout  = parseInt(settings['connection_timeout'], 10) || 30;
+    if (settings['template_dir'])       templateDir  = settings['template_dir'];
     if (settings['plugin_states']) {
       try {
         const states: Record<string, boolean> = JSON.parse(settings['plugin_states']);
@@ -153,6 +156,14 @@
     <span class="unit">seconds</span>
   </div>
 
+  <h3 class="sh" style="margin-top: 0.75rem;">Templates</h3>
+  <div class="field">
+    <label class="lbl" for="adv-tpldir">Template directory</label>
+    <input id="adv-tpldir" class="text-in" value={templateDir} placeholder="~/.config/agor/templates/"
+      onchange={e => setTemplateDir((e.target as HTMLInputElement).value)} />
+    <span class="unit">Where project templates are stored</span>
+  </div>
+
   <h3 class="sh" style="margin-top: 0.75rem;">Plugins</h3>
   <div class="plugin-list">
     {#each plugins as plug}