fix: add altimate_change markers to remaining 2 upstream-shared edits

Addresses two additional Marker Guard violations exposed after the
initial pre-release fix commit — both were pre-existing changes whose
diff hunks did not include the nearest surrounding markers.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: anandgupta42

packages/opencode/src/cli/cmd/tui/component/dialog-provider.tsx

@@ -254,6 +254,7 @@ function ApiMethod(props: ApiMethodProps) {
           // altimate_change start — altimate-backend credential format description
           "altimate-backend": (
             <box gap={1}>
+              {/* altimate_change start — default-URL credential format (2-part preferred) */}
               <text fg={theme.textMuted}>
                 Enter your Altimate credentials in this format:
               </text>
@@ -266,6 +267,7 @@ function ApiMethod(props: ApiMethodProps) {
               <text fg={theme.textMuted}>
                 For a custom API URL, use: api-url::instance-name::api-key
               </text>
+              {/* altimate_change end */}
               <Show when={validationError()}>
                 <text fg={theme.error}>{validationError()!}</text>
               </Show>

packages/opencode/src/config/config.ts

@@ -1143,7 +1143,9 @@ export namespace Config {
         })
         .catchall(Agent)
         .optional()
+        // altimate_change start — altimate docs URL
         .describe("Agent configuration, see https://docs.altimate.sh/configure/agents/"),
+        // altimate_change end
       provider: z
         .record(z.string(), Provider)
         .optional()