Implement Phase 8: Web UI with htmx templates

- HTML templates: layout, login, notebook list, notebook view, page viewer
- Web server with chi router, embedded templates via //go:embed
- Login/logout flow with session cookies
- Notebook list, page grid with SVG thumbnails, page viewer
- Share link views (same templates, no auth chrome)
- Server command wired to start gRPC + REST + web servers concurrently
- Graceful shutdown on SIGINT/SIGTERM

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-03-24 19:59:07 -07:00
parent fedb5e3301
commit 5c4575a67f
9 changed files with 447 additions and 0 deletions

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>{{block "title" .}}Engineering Pad{{end}}</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: system-ui, sans-serif; background: #fff; color: #111; }
.container { max-width: 1200px; margin: 0 auto; padding: 1rem; }
nav { background: #111; color: #fff; padding: 0.75rem 1rem; display: flex; justify-content: space-between; align-items: center; }
nav a { color: #fff; text-decoration: none; }
nav a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin-bottom: 1rem; }
.card { border: 1px solid #ccc; border-radius: 4px; padding: 1rem; margin-bottom: 0.5rem; }
.card:hover { background: #f5f5f5; }
a.card-link { text-decoration: none; color: inherit; display: block; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 1rem; }
.page-thumb { border: 1px solid #ccc; background: #fff; aspect-ratio: 0.773; display: flex; align-items: center; justify-content: center; }
.page-thumb img { width: 100%; height: 100%; object-fit: contain; }
.btn { display: inline-block; padding: 0.5rem 1rem; border: 1px solid #111; border-radius: 4px; text-decoration: none; color: #111; background: #fff; cursor: pointer; }
.btn:hover { background: #f0f0f0; }
.actions { display: flex; gap: 0.5rem; margin: 1rem 0; }
input[type="text"], input[type="password"] { padding: 0.5rem; border: 1px solid #ccc; border-radius: 4px; width: 100%; max-width: 300px; }
label { display: block; margin-bottom: 0.25rem; font-weight: bold; }
.form-group { margin-bottom: 1rem; }
</style>
<script src="/static/htmx.min.js" defer></script>
</head>
<body>
<nav>
<a href="/notebooks">Engineering Pad</a>
{{block "nav-right" .}}{{end}}
</nav>
<div class="container">
{{block "content" .}}{{end}}
</div>
</body>
</html>

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{{define "title"}}Login — Engineering Pad{{end}}
{{define "content"}}
<h1>Login</h1>
<form method="POST" action="/login">
<div class="form-group">
<label for="username">Username</label>
<input type="text" id="username" name="username" required autofocus>
</div>
<div class="form-group">
<label for="password">Password</label>
<input type="password" id="password" name="password" required>
</div>
<button type="submit" class="btn">Login</button>
</form>
{{end}}

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{{define "title"}}{{.Title}} — Engineering Pad{{end}}
{{define "content"}}
<h1>{{.Title}}</h1>
<div class="actions">
<a href="{{.PDFLink}}" class="btn">Download PDF</a>
</div>
<div class="grid">
{{range .Pages}}
<div>
<a href="{{.ViewLink}}">
<div class="page-thumb">
<img src="{{.SVGLink}}" alt="Page {{.Number}}">
</div>
</a>
<div style="text-align:center; margin-top:0.25rem;">Page {{.Number}}</div>
</div>
{{end}}
</div>
{{end}}

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{{define "title"}}Notebooks — Engineering Pad{{end}}
{{define "nav-right"}}<a href="/logout">Logout</a>{{end}}
{{define "content"}}
<h1>Notebooks</h1>
{{range .Notebooks}}
<a class="card-link" href="/notebooks/{{.ID}}">
<div class="card">
<strong>{{.Title}}</strong>
<br><small>{{.PageSize}} — {{.PageCount}} pages — synced {{.SyncedAt}}</small>
</div>
</a>
{{else}}
<p>No notebooks synced yet.</p>
{{end}}
{{end}}

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{{define "title"}}Page {{.PageNumber}} — {{.NotebookTitle}} — Engineering Pad{{end}}
{{define "content"}}
<h1>{{.NotebookTitle}} — Page {{.PageNumber}}</h1>
<div class="actions">
<a href="{{.BackLink}}" class="btn">Back to notebook</a>
<a href="{{.JPGLink}}" class="btn">Download JPG</a>
<a href="{{.PDFLink}}" class="btn">Download PDF</a>
</div>
<div style="border: 1px solid #ccc; background: #fff;">
<img src="{{.SVGLink}}" alt="Page {{.PageNumber}}" style="width: 100%; height: auto;">
</div>
{{end}}