feat: add database migration v9→v10 for Hermes support (Phase 2)

- Bump SCHEMA_VERSION from 9 to 10
- Add enabled_hermes column to mcp_servers and skills tables
- Add migrate_v9_to_v10 with table_exists guard for skills (may not
  exist in databases migrated from very old versions)
- Update dao/mcp.rs to fully read/write enabled_hermes in all queries
- Update dao/skills.rs: don't SELECT enabled_hermes (Hermes doesn't
  support Skills yet), keep column indices clean

src-tauri/src/database/dao/mcp.rs

@@ -13,7 +13,7 @@ impl Database {
     pub fn get_all_mcp_servers(&self) -> Result<IndexMap<String, McpServer>, AppError> {
         let conn = lock_conn!(self.conn);
         let mut stmt = conn.prepare(
-            "SELECT id, name, server_config, description, homepage, docs, tags, enabled_claude, enabled_codex, enabled_gemini, enabled_opencode
+            "SELECT id, name, server_config, description, homepage, docs, tags, enabled_claude, enabled_codex, enabled_gemini, enabled_opencode, enabled_hermes
              FROM mcp_servers
              ORDER BY name ASC, id ASC"
         ).map_err(|e| AppError::Database(e.to_string()))?;
@@ -31,6 +31,7 @@ impl Database {
                 let enabled_codex: bool = row.get(8)?;
                 let enabled_gemini: bool = row.get(9)?;
                 let enabled_opencode: bool = row.get(10)?;
+                let enabled_hermes: bool = row.get(11)?;
 
                 let server = serde_json::from_str(&server_config_str).unwrap_or_default();
                 let tags = serde_json::from_str(&tags_str).unwrap_or_default();
@@ -46,7 +47,7 @@ impl Database {
                             codex: enabled_codex,
                             gemini: enabled_gemini,
                             opencode: enabled_opencode,
-                            hermes: false,
+                            hermes: enabled_hermes,
                         },
                         description,
                         homepage,
@@ -71,8 +72,8 @@ impl Database {
         conn.execute(
             "INSERT OR REPLACE INTO mcp_servers (
                 id, name, server_config, description, homepage, docs, tags,
-                enabled_claude, enabled_codex, enabled_gemini, enabled_opencode
-            ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11)",
+                enabled_claude, enabled_codex, enabled_gemini, enabled_opencode, enabled_hermes
+            ) VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12)",
             params![
                 server.id,
                 server.name,
@@ -88,6 +89,7 @@ impl Database {
                 server.apps.codex,
                 server.apps.gemini,
                 server.apps.opencode,
+                server.apps.hermes,
             ],
         )
         .map_err(|e| AppError::Database(e.to_string()))?;

src-tauri/src/database/dao/skills.rs

@@ -107,9 +107,9 @@ impl Database {
         conn.execute(
             "INSERT OR REPLACE INTO skills
              (id, name, description, directory, repo_owner, repo_name, repo_branch,
-              readme_url, enabled_claude, enabled_codex, enabled_gemini, enabled_opencode,
+              readme_url, enabled_claude, enabled_codex, enabled_gemini, enabled_opencode, enabled_hermes,
               installed_at, content_hash, updated_at)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, ?13, ?14, ?15)",
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9, ?10, ?11, ?12, 0, ?13, ?14, ?15)",
             params![
                 skill.id,
                 skill.name,