Add frontend JS and improve post styling

Frontend is built with Bun. It uses Stimulus to progressively enhance
the server-built HTML. Currently, it only replaces UTC timestamps from
the server with the time in the browser's timezone.

frontend/.gitignore

@@ -0,0 +1,169 @@
+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+\*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+\*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+\*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+\*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.cache
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+.cache/
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+.cache
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.\*

frontend/README.md

@@ -0,0 +1,15 @@
+# crawlnicle-frontend
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run hello_controller.ts
+```
+
+This project was created using `bun init` in bun v0.6.9. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

frontend/globals.d.ts

@@ -0,0 +1,5 @@
+import { Application } from "@hotwired/stimulus";
+
+declare global {
+  var Stimulus: Application;
+}

frontend/index.ts

@@ -0,0 +1,6 @@
+import { Application } from "@hotwired/stimulus";
+
+import LocalTimeController from "./local_time_controller";
+
+window.Stimulus = Application.start();
+window.Stimulus.register("local-time", LocalTimeController);

frontend/local_time_controller.ts

@@ -0,0 +1,24 @@
+import { Controller } from "@hotwired/stimulus";
+
+// Replaces all UTC timestamps with time formated for the local timezone
+export default class extends Controller {
+  connect() {
+    this.renderLocalTime();
+  }
+
+  renderLocalTime() {
+    this.element.textContent = this.localTimeString;
+  }
+
+  get localTimeString(): string {
+    if (this.utcTime) {
+      return this.utcTime.toLocaleDateString();
+    }
+    return "Unknown datetime"
+  }
+
+  get utcTime(): Date | null {
+    const utcString = this.element.getAttribute("datetime");
+    return utcString ? new Date(utcString) : null;
+  }
+}

frontend/package.json

@@ -0,0 +1,14 @@
+{
+  "dependencies": {
+    "@hotwired/stimulus": "^3.2.1"
+  },
+  "name": "crawlnicle-frontend",
+  "module": "hello_controller.ts",
+  "type": "module",
+  "devDependencies": {
+    "bun-types": "^0.6.0"
+  },
+  "peerDependencies": {
+    "typescript": "^5.0.0"
+  }
+}

frontend/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "lib": ["ESNext", "dom"],
+    "module": "esnext",
+    "target": "esnext",
+    "moduleResolution": "node",
+    "moduleDetection": "force",
+    "allowImportingTsExtensions": true,
+    "strict": true,
+    "downlevelIteration": true,
+    "skipLibCheck": true,
+    "jsx": "preserve",
+    "allowSyntheticDefaultImports": true,
+    "forceConsistentCasingInFileNames": true,
+    "allowJs": true,
+    "noEmit": true,
+    "types": [
+       // disabled because of https://github.com/oven-sh/bun/issues/3030
+       // "bun-types" // add Bun global
+    ]
+  }
+}