Add a no-redesign semantic layer that makes native Gitea collaboration Hop-first

Hop-State: A_06FN45YJ09WC2QFGJM27VE8
Hop-Proposal: R_06FN45WVVTHC245S2BK503G
Hop-Task: T_06FN3MVGY3MT82ESQ89BND0
Hop-Attempt: AT_06FN3MVGY092BFA5MR9C7EG

docs/gitea-hop-native.md

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+# Hop-native Gitea semantics
+
+HopWeb keeps Gitea's existing interface design and changes the meaning of its
+collaboration elements. No custom stylesheet, theme, component library, or
+layout override is installed.
+
+## Install
+
+From the project root:
+
+```sh
+./deploy/gitea/install-hop-native.sh
+```
+
+Set `ENV_FILE` when the Compose environment is stored elsewhere:
+
+```sh
+ENV_FILE=/path/to/environment ./deploy/gitea/install-hop-native.sh
+```
+
+The installer copies the adapter into Gitea's persistent custom directory,
+sets the application name to `Hop`, restarts Gitea, and waits for a healthy
+response. Re-run it after editing the adapter or replacing the Gitea volume.
+
+## Semantic mapping
+
+| Native route and behavior | Hop label |
+| --- | --- |
+| Repository code | Files |
+| Issues | Tasks |
+| Branches | Attempts |
+| Commits | Checkpoints |
+| Pull requests | Proposals |
+| Actions | Evidence |
+| Merge pull request | Accept proposal |
+
+The adapter updates visible text, document titles, form placeholders,
+tooltips, and ARIA labels. It scopes replacements to Gitea navigation,
+headings, menus, breadcrumbs, labels, and buttons, so repository content and
+user-authored prose remain unchanged.
+
+Repository home pages also receive a `Hop workflow` group in the existing
+Gitea sidebar. It uses Gitea's own classes, links, icons, and live counts.
+
+## Upgrade check
+
+After changing the pinned Gitea version:
+
+1. run the installer;
+2. confirm Tasks, Proposals, and Evidence in repository navigation;
+3. confirm Attempts and Checkpoints in the Files view;
+4. confirm proposal creation and acceptance labels;
+5. inspect browser console errors; and
+6. test a narrow viewport and keyboard navigation.
+