feat: enhance plugin and MCP management panels

Add comprehensive management capabilities to both panels:

MCP Management Panel:
- Add "Add New Server" form with transport selection (STDIO/HTTP/SSE)
- Add enhanced server details view showing full CLI output
- Dynamic placeholder text based on transport type
- Support for environment variables and headers (backend)

Plugin Management Panel:
- Add collapsible marketplace management section
- Add/remove marketplaces from GitHub repos
- List all configured marketplaces with sources
- Enhanced plugin installation with marketplace syntax support

Backend Commands:
- add_mcp_server: Add MCP servers with transport/env/headers
- get_mcp_server_details: Fetch full server details from CLI
- list_marketplaces: Parse and list plugin marketplaces
- add_marketplace: Add marketplace from GitHub source
- remove_marketplace: Remove marketplace by name

All operations use Claude CLI directly, avoiding cross-platform path
issues by letting the CLI handle file system operations internally.

✨ This enhancement was built by Hikari~ 🌸

src/lib/components/McpManagementPanel.svelte

@@ -24,6 +24,14 @@
   let selectedServer = $state<McpServerInfo | null>(null);
   let isLoadingDetails = $state(false);
   let actionInProgress = $state<string | null>(null);
+  let showAddForm = $state(false);
+  let serverDetails = $state<string>("");
+
+  // Add server form fields
+  let newServerName = $state("");
+  let newServerUrl = $state("");
+  let newServerTransport = $state("stdio");
+  let isAdding = $state(false);
 
   async function loadServers(): Promise<void> {
     try {
@@ -43,6 +51,7 @@
       isLoadingDetails = true;
       error = null;
       selectedServer = await invoke<McpServerInfo>("get_mcp_server", { name });
+      serverDetails = await invoke<string>("get_mcp_server_details", { name });
     } catch (e) {
       error = `Failed to load server details: ${e}`;
       console.error(error);
@@ -58,6 +67,7 @@
       await invoke("remove_mcp_server", { name });
       if (selectedServer?.name === name) {
         selectedServer = null;
+        serverDetails = "";
       }
       await loadServers();
     } catch (e) {
@@ -68,6 +78,32 @@
     }
   }
 
+  async function addServer(): Promise<void> {
+    if (!newServerName.trim() || !newServerUrl.trim()) return;
+
+    try {
+      isAdding = true;
+      error = null;
+      await invoke("add_mcp_server", {
+        name: newServerName.trim(),
+        commandOrUrl: newServerUrl.trim(),
+        transport: newServerTransport,
+        envVars: null,
+        headers: null,
+      });
+      newServerName = "";
+      newServerUrl = "";
+      newServerTransport = "stdio";
+      showAddForm = false;
+      await loadServers();
+    } catch (e) {
+      error = `Failed to add server: ${e}`;
+      console.error(error);
+    } finally {
+      isAdding = false;
+    }
+  }
+
   function getTransportIcon(transport: string) {
     switch (transport) {
       case "http":
@@ -135,13 +171,75 @@
     </button>
   </div>
 
-  <!-- Info Box -->
-  <div class="mx-4 mt-4 p-3 bg-[var(--accent-primary)]/10 border border-[var(--accent-primary)]/30 rounded-lg">
-    <p class="text-sm text-[var(--text-primary)]">
-      💡 To add new MCP servers, use the Settings panel or edit your configuration directly.
-    </p>
+  <!-- Add Server Button -->
+  <div class="p-4 border-b border-[var(--border-color)]">
+    <button
+      onclick={() => (showAddForm = !showAddForm)}
+      class="w-full px-4 py-2 bg-[var(--accent-primary)] text-white rounded-lg text-sm font-medium hover:opacity-80 transition-opacity flex items-center justify-center gap-2"
+    >
+      <Server class="w-4 h-4" />
+      {showAddForm ? "Cancel" : "Add New Server"}
+    </button>
   </div>
 
+  <!-- Add Server Form -->
+  {#if showAddForm}
+    <div class="mx-4 mt-4 p-4 bg-[var(--bg-secondary)]/50 border border-[var(--border-color)] rounded-lg">
+      <h3 class="text-sm font-medium text-[var(--text-primary)] mb-3">Add MCP Server</h3>
+      <div class="space-y-3">
+        <div>
+          <label class="text-xs text-[var(--text-secondary)] uppercase tracking-wider block mb-1"
+            >Server Name</label
+          >
+          <input
+            type="text"
+            bind:value={newServerName}
+            placeholder="my-server"
+            class="w-full px-3 py-2 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] text-sm focus:outline-none focus:border-[var(--accent-primary)]"
+          />
+        </div>
+        <div>
+          <label class="text-xs text-[var(--text-secondary)] uppercase tracking-wider block mb-1"
+            >Transport</label
+          >
+          <select
+            bind:value={newServerTransport}
+            class="w-full px-3 py-2 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] text-sm focus:outline-none focus:border-[var(--accent-primary)]"
+          >
+            <option value="stdio">STDIO</option>
+            <option value="http">HTTP</option>
+            <option value="sse">SSE</option>
+          </select>
+        </div>
+        <div>
+          <label class="text-xs text-[var(--text-secondary)] uppercase tracking-wider block mb-1">
+            {newServerTransport === "stdio" ? "Command" : "URL"}
+          </label>
+          <input
+            type="text"
+            bind:value={newServerUrl}
+            placeholder={newServerTransport === "stdio"
+              ? "npx my-mcp-server"
+              : "https://mcp.example.com"}
+            class="w-full px-3 py-2 bg-[var(--bg-primary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] text-sm focus:outline-none focus:border-[var(--accent-primary)]"
+          />
+        </div>
+        <button
+          onclick={addServer}
+          disabled={isAdding || !newServerName.trim() || !newServerUrl.trim()}
+          class="w-full px-4 py-2 bg-[var(--accent-primary)] text-white rounded-lg text-sm font-medium hover:opacity-80 disabled:opacity-40 disabled:cursor-not-allowed flex items-center justify-center gap-2"
+        >
+          {#if isAdding}
+            <RefreshCw class="w-4 h-4 animate-spin" />
+          {:else}
+            <Server class="w-4 h-4" />
+          {/if}
+          Add Server
+        </button>
+      </div>
+    </div>
+  {/if}
+
   <!-- Error Display -->
   {#if error}
     <div class="mx-4 mt-4 p-3 bg-red-500/20 border border-red-500/30 rounded-lg">
@@ -282,6 +380,17 @@
               </div>
             {/if}
 
+            <!-- Full Server Details -->
+            {#if serverDetails}
+              <div>
+                <label class="text-xs text-[var(--text-secondary)] uppercase tracking-wider"
+                  >Full Details</label
+                >
+                <pre
+                  class="text-xs text-[var(--text-primary)] mt-1 font-mono bg-[var(--bg-primary)] p-2 rounded border border-[var(--border-color)] overflow-x-auto whitespace-pre-wrap">{serverDetails}</pre>
+              </div>
+            {/if}
+
             <!-- Actions -->
             <div class="pt-4 border-t border-[var(--border-color)]">
               <button

src/lib/components/PluginManagementPanel.svelte

@@ -14,14 +14,24 @@
     enabled: boolean;
   }
 
+  interface MarketplaceInfo {
+    name: string;
+    source: string;
+  }
+
   const { onClose }: Props = $props();
 
   let plugins = $state<PluginInfo[]>([]);
+  let marketplaces = $state<MarketplaceInfo[]>([]);
   let isLoading = $state(true);
+  let isLoadingMarketplaces = $state(false);
   let error = $state<string | null>(null);
   let newPluginName = $state("");
   let isInstalling = $state(false);
   let actionInProgress = $state<string | null>(null);
+  let showMarketplaces = $state(false);
+  let newMarketplaceSource = $state("");
+  let isAddingMarketplace = $state(false);
 
   async function loadPlugins(): Promise<void> {
     try {
@@ -36,6 +46,19 @@
     }
   }
 
+  async function loadMarketplaces(): Promise<void> {
+    try {
+      isLoadingMarketplaces = true;
+      error = null;
+      marketplaces = await invoke<MarketplaceInfo[]>("list_marketplaces");
+    } catch (e) {
+      error = `Failed to load marketplaces: ${e}`;
+      console.error(error);
+    } finally {
+      isLoadingMarketplaces = false;
+    }
+  }
+
   async function installPlugin(): Promise<void> {
     if (!newPluginName.trim()) return;
 
@@ -99,6 +122,37 @@
     }
   }
 
+  async function addMarketplace(): Promise<void> {
+    if (!newMarketplaceSource.trim()) return;
+
+    try {
+      isAddingMarketplace = true;
+      error = null;
+      await invoke("add_marketplace", { source: newMarketplaceSource.trim() });
+      newMarketplaceSource = "";
+      await loadMarketplaces();
+    } catch (e) {
+      error = `Failed to add marketplace: ${e}`;
+      console.error(error);
+    } finally {
+      isAddingMarketplace = false;
+    }
+  }
+
+  async function removeMarketplace(name: string): Promise<void> {
+    try {
+      actionInProgress = name;
+      error = null;
+      await invoke("remove_marketplace", { name });
+      await loadMarketplaces();
+    } catch (e) {
+      error = `Failed to remove marketplace: ${e}`;
+      console.error(error);
+    } finally {
+      actionInProgress = null;
+    }
+  }
+
   onMount(() => {
     loadPlugins();
   });
@@ -156,11 +210,14 @@
   <!-- Install Plugin Section -->
   <div class="p-4 border-b border-[var(--border-color)]">
     <h3 class="text-sm font-medium text-[var(--text-primary)] mb-2">Install New Plugin</h3>
+    <p class="text-xs text-[var(--text-secondary)] mb-3">
+      Enter plugin name (e.g., "macrodata" or "macrodata@macrodata" for specific marketplace)
+    </p>
     <div class="flex gap-2">
       <input
         type="text"
         bind:value={newPluginName}
-        placeholder="Plugin name..."
+        placeholder="plugin-name or plugin@marketplace"
         class="flex-1 px-3 py-2 bg-[var(--bg-secondary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] text-sm focus:outline-none focus:border-[var(--accent-primary)]"
         onkeydown={(e) => e.key === "Enter" && installPlugin()}
         disabled={isInstalling}
@@ -180,6 +237,97 @@
     </div>
   </div>
 
+  <!-- Marketplace Management Section -->
+  <div class="p-4 border-b border-[var(--border-color)]">
+    <button
+      onclick={() => {
+        showMarketplaces = !showMarketplaces;
+        if (showMarketplaces && marketplaces.length === 0) {
+          loadMarketplaces();
+        }
+      }}
+      class="w-full text-left flex items-center justify-between text-sm font-medium text-[var(--text-primary)] hover:text-[var(--accent-primary)] transition-colors"
+    >
+      <span>Manage Marketplaces</span>
+      <svg
+        xmlns="http://www.w3.org/2000/svg"
+        class="h-4 w-4 transition-transform"
+        class:rotate-180={showMarketplaces}
+        fill="none"
+        viewBox="0 0 24 24"
+        stroke="currentColor"
+      >
+        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7" />
+      </svg>
+    </button>
+
+    {#if showMarketplaces}
+      <div class="mt-3 space-y-3">
+        <!-- Add Marketplace Form -->
+        <div>
+          <p class="text-xs text-[var(--text-secondary)] mb-2">
+            Add a marketplace from GitHub (e.g., "ascorbic/macrodata")
+          </p>
+          <div class="flex gap-2">
+            <input
+              type="text"
+              bind:value={newMarketplaceSource}
+              placeholder="owner/repo"
+              class="flex-1 px-3 py-2 bg-[var(--bg-secondary)] border border-[var(--border-color)] rounded-lg text-[var(--text-primary)] text-sm focus:outline-none focus:border-[var(--accent-primary)]"
+              onkeydown={(e) => e.key === "Enter" && addMarketplace()}
+              disabled={isAddingMarketplace}
+            />
+            <button
+              onclick={addMarketplace}
+              disabled={isAddingMarketplace || !newMarketplaceSource.trim()}
+              class="px-4 py-2 bg-[var(--accent-primary)] text-white rounded-lg text-sm font-medium hover:opacity-80 disabled:opacity-40 disabled:cursor-not-allowed flex items-center gap-2"
+            >
+              {#if isAddingMarketplace}
+                <RefreshCw class="w-4 h-4 animate-spin" />
+              {:else}
+                <Download class="w-4 h-4" />
+              {/if}
+              Add
+            </button>
+          </div>
+        </div>
+
+        <!-- Marketplaces List -->
+        {#if isLoadingMarketplaces}
+          <div class="flex items-center justify-center py-4">
+            <RefreshCw class="w-5 h-5 animate-spin text-[var(--text-secondary)]" />
+          </div>
+        {:else if marketplaces.length > 0}
+          <div class="space-y-2">
+            {#each marketplaces as marketplace (marketplace.name)}
+              <div
+                class="bg-[var(--bg-secondary)]/50 rounded-lg p-3 border border-[var(--border-color)]"
+              >
+                <div class="flex items-start justify-between">
+                  <div class="flex-1">
+                    <h4 class="font-medium text-[var(--text-primary)]">{marketplace.name}</h4>
+                    <p class="text-xs text-[var(--text-secondary)] mt-1">{marketplace.source}</p>
+                  </div>
+                  <button
+                    onclick={() => removeMarketplace(marketplace.name)}
+                    disabled={actionInProgress === marketplace.name}
+                    class="px-2 py-1 text-red-400 hover:bg-red-500/20 rounded transition-colors disabled:opacity-40"
+                  >
+                    <Trash2 class="w-4 h-4" />
+                  </button>
+                </div>
+              </div>
+            {/each}
+          </div>
+        {:else}
+          <p class="text-sm text-[var(--text-secondary)] text-center py-4">
+            No marketplaces configured
+          </p>
+        {/if}
+      </div>
+    {/if}
+  </div>
+
   <!-- Error Display -->
   {#if error}
     <div class="mx-4 mt-4 p-3 bg-red-500/20 border border-red-500/30 rounded-lg">