Update default models and pricing across presets

Bump default model names project-wide: gpt-5.4 -> gpt-5.5,
gemini-3.x -> gemini-3.5-flash, glm-5 -> glm-5.1, and
grok-code-fast-1 -> grok-build-0.1 across all provider presets
(claude, codex, gemini, hermes, openclaw, opencode, universal),
Gemini config, and stream check defaults.

Pricing:
- Seed gemini-3.5-flash, gemini-3.1-flash-lite, step-3.5-flash-2603,
  doubao-seed-2.0-code, mimo-v2.5(/pro), qwen3-coder-480b, grok-build-0.1.
- Correct deepseek-v4-flash/pro, glm-5/5.1, grok pricing.
- Add repair_current_model_pricing: idempotent pass that fixes only
  rows still equal to the outdated built-in values, preserving any
  user-customized prices (seed uses INSERT OR IGNORE and cannot update
  existing rows).

Fixes from review:
- opencode: drop duplicate gemini-3.5-flash variant (unreachable via
  .find), keep the entry with the full minimal/low/medium/high set.
- Align stale display names/costs to gemini-3.5-flash (hermes, openclaw,
  opencode); openclaw cost -> {1.5, 9, 0.15} to match seed.
- i18n (zh/en/ja/zh-TW): refresh OMO category tooltips for new model
  names; fix writing tooltip to Kimi K2.5 to match its recommended.

Update tests accordingly and add a regression test asserting unique
model ids in the Google opencode preset variants.

src-tauri/src/database/tests.rs

@@ -662,6 +662,66 @@ fn schema_model_pricing_is_seeded_on_init() {
     );
 }
 
+#[test]
+fn model_pricing_seed_repairs_known_outdated_builtin_prices() {
+    let db = Database::memory().expect("create memory db");
+
+    {
+        let conn = db.conn.lock().expect("lock conn");
+        conn.execute(
+            "UPDATE model_pricing
+             SET input_cost_per_million = '1.68',
+                 output_cost_per_million = '3.36',
+                 cache_read_cost_per_million = '0.14',
+                 cache_creation_cost_per_million = '0'
+             WHERE model_id = 'deepseek-v4-pro'",
+            [],
+        )
+        .expect("restore old DeepSeek price");
+        conn.execute(
+            "UPDATE model_pricing
+             SET input_cost_per_million = '9',
+                 output_cost_per_million = '9',
+                 cache_read_cost_per_million = '9',
+                 cache_creation_cost_per_million = '0'
+             WHERE model_id = 'glm-5.1'",
+            [],
+        )
+        .expect("set custom GLM price");
+    }
+
+    db.ensure_model_pricing_seeded()
+        .expect("ensure pricing seeded");
+
+    let conn = db.conn.lock().expect("lock conn");
+    let deepseek: (String, String, String) = conn
+        .query_row(
+            "SELECT input_cost_per_million, output_cost_per_million, cache_read_cost_per_million
+             FROM model_pricing WHERE model_id = 'deepseek-v4-pro'",
+            [],
+            |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)),
+        )
+        .expect("query DeepSeek price");
+    assert_eq!(
+        deepseek,
+        (
+            "0.435".to_string(),
+            "0.87".to_string(),
+            "0.003625".to_string()
+        )
+    );
+
+    let glm: (String, String, String) = conn
+        .query_row(
+            "SELECT input_cost_per_million, output_cost_per_million, cache_read_cost_per_million
+             FROM model_pricing WHERE model_id = 'glm-5.1'",
+            [],
+            |row| Ok((row.get(0)?, row.get(1)?, row.get(2)?)),
+        )
+        .expect("query GLM price");
+    assert_eq!(glm, ("9".to_string(), "9".to_string(), "9".to_string()));
+}
+
 #[test]
 fn ensure_incremental_auto_vacuum_rebuilds_existing_file_db() {
     let temp = NamedTempFile::new().expect("create temp db file");