feat(agent): migrate Oracle to JDBC agent, add install progress bar and toast

- Migrate Oracle from rust-oracle to JDBC agent (ojdbc11)
- Delete oracle_driver.rs (567 lines) and rust-oracle dependency
- Add streaming download progress bar for driver/JRE installation
- Add toast notifications for install/uninstall success/failure
- Add "update available" badge in driver manager

src/components/config/DriverManager.vue

@@ -1,8 +1,13 @@
 <script setup lang="ts">
-import { ref, onMounted } from "vue";
+import { ref, onMounted, onUnmounted, computed } from "vue";
 import { invoke } from "@tauri-apps/api/core";
+import { listen } from "@tauri-apps/api/event";
+import type { UnlistenFn } from "@tauri-apps/api/event";
 import { Button } from "@/components/ui/button";
 import { Label } from "@/components/ui/label";
+import { useToast } from "@/composables/useToast";
+
+const { toast } = useToast();
 
 interface AgentDriverInfo {
   db_type: string;
@@ -14,13 +19,51 @@ interface AgentDriverInfo {
   update_available: boolean;
 }
 
+interface InstallProgress {
+  step: string;
+  downloaded?: number;
+  total?: number;
+}
+
 const drivers = ref<AgentDriverInfo[]>([]);
 const jreInstalled = ref(false);
 const installing = ref<string | null>(null);
 const reinstallingJre = ref(false);
+const progress = ref<InstallProgress | null>(null);
+
+let unlisten: UnlistenFn | null = null;
 
 onMounted(async () => {
   await refresh();
+  unlisten = await listen<InstallProgress>("agent-install-progress", (event) => {
+    if (event.payload.step === "done") {
+      progress.value = null;
+    } else {
+      progress.value = event.payload;
+    }
+  });
+});
+
+onUnmounted(() => {
+  unlisten?.();
+});
+
+const progressText = computed(() => {
+  const p = progress.value;
+  if (!p) return "";
+  if (p.step === "jre-extract") return "解压 JRE...";
+  const label = p.step === "jre" ? "下载 JRE" : "下载驱动";
+  if (!p.total) return `${label}...`;
+  const pct = Math.round(((p.downloaded ?? 0) / p.total) * 100);
+  const dl = formatSize(p.downloaded ?? 0);
+  const total = formatSize(p.total);
+  return `${label}  ${dl} / ${total}  (${pct}%)`;
+});
+
+const progressPercent = computed(() => {
+  const p = progress.value;
+  if (!p || !p.total) return 0;
+  return Math.round(((p.downloaded ?? 0) / p.total) * 100);
 });
 
 async function refresh() {
@@ -29,40 +72,50 @@ async function refresh() {
 }
 
 async function installDriver(dbType: string) {
+  const label = drivers.value.find((d) => d.db_type === dbType)?.label ?? dbType;
   installing.value = dbType;
+  progress.value = null;
   try {
     await invoke("install_agent", { dbType });
     await refresh();
+    toast(`${label} 驱动安装成功`);
   } catch (e: any) {
-    alert(e);
+    toast(`${label} 驱动安装失败: ${e}`);
   } finally {
     installing.value = null;
+    progress.value = null;
   }
 }
 
 async function uninstallDriver(dbType: string) {
+  const label = drivers.value.find((d) => d.db_type === dbType)?.label ?? dbType;
   try {
     await invoke("uninstall_agent", { dbType });
     await refresh();
+    toast(`${label} 驱动已卸载`);
   } catch (e: any) {
-    alert(e);
+    toast(`${label} 驱动卸载失败: ${e}`);
   }
 }
 
 async function reinstallJre() {
   reinstallingJre.value = true;
+  progress.value = null;
   try {
     await invoke("reinstall_jre");
     await refresh();
+    toast("JRE 重新安装成功");
   } catch (e: any) {
-    alert(e);
+    toast(`JRE 重新安装失败: ${e}`);
   } finally {
     reinstallingJre.value = false;
+    progress.value = null;
   }
 }
 
 function formatSize(bytes: number): string {
   if (!bytes) return "";
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} KB`;
   return `${(bytes / 1024 / 1024).toFixed(1)} MB`;
 }
 </script>
@@ -96,6 +149,17 @@ function formatSize(bytes: number): string {
       </div>
     </div>
 
+    <!-- Progress bar -->
+    <div v-if="progress" class="space-y-1.5">
+      <div class="text-xs text-muted-foreground">{{ progressText }}</div>
+      <div class="h-1.5 w-full overflow-hidden rounded-full bg-muted">
+        <div
+          class="h-full rounded-full bg-primary transition-all duration-200"
+          :style="{ width: `${progressPercent}%` }"
+        />
+      </div>
+    </div>
+
     <div class="rounded-md border">
       <div v-if="drivers.length === 0" class="p-4 text-sm text-muted-foreground">加载中...</div>
       <div v-else class="divide-y">
@@ -106,6 +170,7 @@ function formatSize(bytes: number): string {
               <span v-if="driver.installed">v{{ driver.installed_version }}</span>
               <span v-if="driver.installed && formatSize(driver.size)"> · </span>
               <span v-if="formatSize(driver.size)">{{ formatSize(driver.size) }}</span>
+              <span v-if="driver.update_available" class="ml-1.5 text-amber-500">有更新</span>
             </div>
           </div>
           <div class="flex shrink-0 items-center gap-2">
@@ -113,7 +178,21 @@ function formatSize(bytes: number): string {
             <Button v-if="driver.installed" variant="ghost" size="sm" @click="uninstallDriver(driver.db_type)">
               卸载
             </Button>
-            <Button v-else size="sm" :disabled="installing !== null" @click="installDriver(driver.db_type)">
+            <Button
+              v-if="driver.installed && driver.update_available"
+              size="sm"
+              variant="outline"
+              :disabled="installing !== null"
+              @click="installDriver(driver.db_type)"
+            >
+              {{ installing === driver.db_type ? "更新中..." : "更新" }}
+            </Button>
+            <Button
+              v-if="!driver.installed"
+              size="sm"
+              :disabled="installing !== null"
+              @click="installDriver(driver.db_type)"
+            >
               {{ installing === driver.db_type ? "安装中..." : "安装" }}
             </Button>
           </div>

src/lib/databaseCapabilities.ts

@@ -96,7 +96,7 @@ export const TREE_SCHEMA_TYPES = new Set<DatabaseType>(["postgres", "redshift",
 
 export const PG_LIKE_STRUCTURE_TYPES = new Set<DatabaseType>(["postgres", "redshift", "gaussdb"]);
 
-export const AGENT_DRIVER_TYPES = new Set<DatabaseType>(["dameng", "kingbase", "vastbase", "goldendb"]);
+export const AGENT_DRIVER_TYPES = new Set<DatabaseType>(["dameng", "kingbase", "vastbase", "goldendb", "oracle"]);
 
 export const TRANSFER_SQL_TYPES = new Set<DatabaseType>([
   "mysql",