feat: add project file system with CRUD, upload, inline editing, and video attachment support

- Add new `/projects/{slug}/files` endpoint group for per-project filesystem operations including directory and file CRUD, upload, and inline editing with public read and owner write access
- Extend attachment system to support video formats (webm, ogv, mov, m4v) with proper file icons and MIME types
- Implement configurable allowed file types via `allowed_file_types` site setting, replacing hardcoded `ALLOWED_UPLOAD_TYPES` with dynamic `allowed_extensions()` and `is_extension_allowed()` functions
- Add `delete_all_project_files()` call in `delete_content_item()` to clean up project files when a project is deleted
- Create database indexes on `project_files` table for `(project_uid, path)` and `(project_uid, parent_path)` to optimize file lookups
- Introduce `docs_prose.py` module with `render_prose()` function that renders Markdown content inside `data-render` divs using mistune, enabling dynamic prose rendering in documentation pages
- Enhance docs search with Markdown-aware text stripping (`_demarkdown()`) and improved HTML/script/style sanitization for better search indexing
- Update documentation API samples to reflect new attachment response fields (`is_image`, `is_video`, `mime_type`) and note video format support
- Update README to document the new project files endpoint and clarify AI gateway attribution for guest Devii sessions

devplacepy/static/js/Application.js

@@ -1,3 +1,4 @@
+import "./components/index.js";
 import { ModalManager } from "./ModalManager.js";
 import { FormManager } from "./FormManager.js";
 import { VoteManager } from "./VoteManager.js";
@@ -15,11 +16,16 @@ import { ReactionBar } from "./ReactionBar.js";
 import { BookmarkManager } from "./BookmarkManager.js";
 import { PollManager } from "./PollManager.js";
 import { ApiKeyManager } from "./ApiKeyManager.js";
+import { UserAiUsage } from "./UserAiUsage.js";
 import { Tabs } from "./Tabs.js";
 import { DeviiTerminal } from "./DeviiTerminal.js";
 
 class Application {
     constructor() {
+        this.dialog = document.createElement("dp-dialog");
+        this.contextMenu = document.createElement("dp-context-menu");
+        this.toast = document.createElement("dp-toast");
+        document.body.append(this.dialog, this.contextMenu, this.toast);
         this.modals = new ModalManager();
         this.forms = new FormManager();
         this.votes = new VoteManager();
@@ -37,6 +43,7 @@ class Application {
         this.bookmarks = new BookmarkManager();
         this.polls = new PollManager();
         this.apiKey = new ApiKeyManager();
+        this.userAiUsage = new UserAiUsage();
         this.tabs = new Tabs();
         this.devii = new DeviiTerminal();
     }