feat(presets): upgrade default models to Opus 5, GPT-5.6 Sol and Gemini 3.6 Flash

Bump the default model IDs across every preset file and the downstream
defaults that mirror them:

- claude-opus-4-8 / anthropic/claude-opus-4.8 / global.anthropic.claude-opus-4-8
  -> claude-opus-5, covering all three naming forms
- gpt-5.5 and the bare gpt-5.6 -> gpt-5.6-sol
- gemini-3.5-flash -> gemini-3.6-flash

Add gemini-3.6-flash to the built-in pricing seed (1.50 in / 7.50 out /
0.15 cache read per million). The seed runs INSERT OR IGNORE on every
startup, so existing databases pick the row up without overriding prices
the user edited by hand.

Advance the Claude Desktop opus route ID in step with the frontend SSOT:
CURRENT_OPUS_ROUTE_ID becomes claude-opus-5 and claude-opus-4-8 takes over
the LEGACY slot, so route IDs stored in existing user configs still resolve
through is_compatible_opus_route_alias.

Also sync omo.ts recommendations, form placeholders, the SudoCode partner
blurb and all four locales, plus the preset assertions that pin these IDs.

src-tauri/src/claude_desktop_config.rs

@@ -32,8 +32,8 @@ pub const ANTHROPIC_CLAUDE_ROUTE_PREFIX: &str = "anthropic/claude-";
 /// Claude Desktop schema 不接受此后缀，import 边界翻译为 `supports1m` 字段。
 pub const ONE_M_CONTEXT_MARKER: &str = "[1m]";
 
-const CURRENT_OPUS_ROUTE_ID: &str = "claude-opus-4-8";
-const LEGACY_OPUS_ROUTE_ID: &str = "claude-opus-4-7";
+const CURRENT_OPUS_ROUTE_ID: &str = "claude-opus-5";
+const LEGACY_OPUS_ROUTE_ID: &str = "claude-opus-4-8";
 
 #[derive(Debug, Clone, Copy, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -1989,7 +1989,7 @@ mod tests {
             .iter()
             .find(|route| route.upstream_model == "deepseek-v4-pro")
             .expect("repaired route");
-        assert_eq!(repaired.route_id, "claude-opus-4-8");
+        assert_eq!(repaired.route_id, "claude-opus-5");
         assert_eq!(repaired.label_override.as_deref(), Some("deepseek-v4-pro"));
         assert!(repaired.supports_1m);
         let repaired_old = routes

src-tauri/src/commands/provider.rs

@@ -1098,7 +1098,7 @@ mod import_claude_desktop_tests {
         let routes = suggested_claude_desktop_routes(&p).expect("routes built");
         assert_eq!(routes.len(), 3);
         assert_eq!(routes.get("claude-sonnet-5").unwrap().model, "GLM-4.6");
-        assert_eq!(routes.get("claude-opus-4-8").unwrap().model, "GLM-4-Air");
+        assert_eq!(routes.get("claude-opus-5").unwrap().model, "GLM-4-Air");
         assert_eq!(routes.get("claude-haiku-4-5").unwrap().model, "GLM-4-Flash");
         assert_eq!(
             routes

src-tauri/src/database/schema.rs

@@ -1855,6 +1855,15 @@ impl Database {
             ("gpt-4.1", "GPT-4.1", "2", "8", "0.50", "0"),
             ("gpt-4.1-mini", "GPT-4.1 Mini", "0.40", "1.60", "0.10", "0"),
             ("gpt-4.1-nano", "GPT-4.1 Nano", "0.10", "0.40", "0.025", "0"),
+            // Gemini 3.6 系列
+            (
+                "gemini-3.6-flash",
+                "Gemini 3.6 Flash",
+                "1.50",
+                "7.50",
+                "0.15",
+                "0",
+            ),
             // Gemini 3.5 系列
             (
                 "gemini-3.5-flash",