Add password-visibility toggle to login page (TypeScript)

- web/ts/login.ts: small vanilla TS module toggling the password input's
  type between 'password'/'text' via a 'Show/Hide' button, so users can
  rule out typos before submitting. Compiled to web/static/login.js
  (ES module) via tsc (web/tsconfig.json, new 'make web-ts'/'web-assets'
  Makefile targets) and loaded via <script type="module">. Compiled JS
  is committed/embedded the same way as the compiled CSS — no Node.js
  needed at runtime.
- Verified end-to-end against the live proxied server
  (https://local.unqr.dev/web/login): POST /web/login correctly returns
  303 + Set-Cookie, and the session then authorizes GET /web/ — the
  server-side login flow is confirmed working correctly.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/copilot-instructions.md

@@ -17,6 +17,8 @@ make tidy            # go mod tidy
 go test ./internal/store/ -run TestStoreRoundTrip -v   # single test
 make templ-generate  # regenerate *_templ.go after editing internal/web/templates/*.templ
 make web-css         # templ-generate + rebuild web/static/app.css (needs `make web-deps` once, Node.js/npm)
+make web-ts          # compile web/ts/*.ts to web/static/*.js
+make web-assets      # web-css + web-ts (everything under web/static/)
 ```
 
 Test files: `internal/store/store_test.go`, `internal/webdav/handler_test.go`,
@@ -154,10 +156,15 @@ Test files: `internal/store/store_test.go`, `internal/webdav/handler_test.go`,
   to `web/static/app.css` via `make web-css` (needs Node/npm — see
   `web/package.json`); htmx itself is vendored as a static file
   (`web/static/htmx.min.js`, not npm-installed) to avoid a CDN dependency.
-  Both static assets are embedded into the Go binary at build time via
+  Client-side-only logic (currently just the login page's password-visibility
+  toggle) is written in TypeScript under `web/ts/*.ts`, compiled to plain
+  JS via `tsc` (`web/tsconfig.json`, `make web-ts`) into `web/static/*.js`
+  as ES modules (`<script type="module">`). All static assets (CSS, JS,
+  vendored htmx) are embedded into the Go binary at build time via
   `web/staticassets.go` (`//go:embed static`), so the compiled server has
   no runtime dependency on Node.js or the `web/` directory being present —
-  Node/npm are only needed when actually changing templates/styles.
+  Node/npm are only needed when actually changing templates/styles/TS
+  (`make web-assets` rebuilds everything under `web/static/`).
 
 ## Conventions
 

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build run test tidy lint docker hash-password nidusctl web-deps web-css templ-generate
+.PHONY: build run test tidy lint docker hash-password nidusctl web-deps web-css web-ts web-assets templ-generate
 
 ## build: compile the binary
 build:
@@ -43,7 +43,7 @@ nidusctl: build
 templ-generate:
 	templ generate
 
-## web-deps: install the Tailwind CLI (needed once, or after web/package.json changes)
+## web-deps: install the Tailwind CLI + TypeScript compiler (needed once, or after web/package.json changes)
 web-deps:
 	cd web && npm install
 
@@ -51,3 +51,11 @@ web-deps:
 ## Run this after editing any .templ file or web/input.css.
 web-css: templ-generate
 	cd web && npx @tailwindcss/cli -i ./input.css -o ./static/app.css --minify
+
+## web-ts: compile web/ts/*.ts to web/static/*.js
+## Run this after editing any .ts file.
+web-ts:
+	cd web && npx tsc -p tsconfig.json
+
+## web-assets: rebuild everything under web/static/ (CSS + JS)
+web-assets: web-css web-ts

README.md

@@ -181,7 +181,8 @@ A small server-rendered dashboard is served at `/web/` (separate from the
 DAV endpoints, which stay on HTTP Basic Auth):
 
 - **Login** (`/web/login`) — cookie-based session, stored server-side in
-  `nidus.db` (`web_sessions` table), independent of DAV Basic Auth.
+  `nidus.db` (`web_sessions` table), independent of DAV Basic Auth. Includes
+  a "Show/Hide" password toggle to rule out typos before submitting.
 - **Dashboard** (`/web/`) — lists your own calendars/address books, who
   they're shared with, and any resources other users have shared with you.
 - **Share management** — add/remove shares directly from the dashboard
@@ -190,16 +191,18 @@ DAV endpoints, which stay on HTTP Basic Auth):
 - **Logout** (`/web/logout`).
 
 Implementation: [templ](https://templ.guide/) for type-safe Go HTML
-templates, [Tailwind CSS v4](https://tailwindcss.com/) for styling, and
+templates, [Tailwind CSS v4](https://tailwindcss.com/) for styling, htmx
-htmx for the sprinkles of dynamic behavior (form submission via
+for the sprinkles of dynamic behavior (form submission via POST/DELETE,
-POST/DELETE, partial page swaps) — no separate JS build/framework needed.
+partial page swaps), and TypeScript (compiled to plain JS, `web/ts/`) for
-The compiled CSS and the htmx bundle are embedded into the Go binary
+the few bits of client-side-only logic (e.g. the password-visibility
+toggle) — no separate JS framework needed. The compiled CSS, compiled JS,
+and the htmx bundle are all embedded into the Go binary
 (`web/staticassets.go`), so no Node.js is required at runtime, only when
-you change styles or templates during development:
+you change styles, templates, or TypeScript during development:
 
 ```bash
-make web-deps   # once, installs the Tailwind CLI (needs Node.js/npm)
+make web-deps    # once, installs the Tailwind CLI + TypeScript compiler (needs Node.js/npm)
-make web-css    # regenerate templ code + rebuild web/static/app.css
+make web-assets  # regenerate templ code + rebuild web/static/app.css and web/static/*.js
 ```
 
 ---

internal/web/templates/login.templ

@@ -23,8 +23,14 @@ templ Login(errorMsg string) {
 					</div>
 					<div>
 						<label for="password" class="block text-sm font-medium text-gray-700">Password</label>
-						<input id="password" name="password" type="password" required
+						<div class="mt-1 flex gap-2">
-							class="mt-1 block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"/>
+							<input id="password" name="password" type="password" required
+								class="block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500"/>
+							<button type="button" id="toggle-password" aria-pressed="false"
+								class="shrink-0 rounded-md border border-gray-300 px-3 py-2 text-sm text-gray-600 hover:bg-gray-50">
+								Show
+							</button>
+						</div>
 					</div>
 					<button type="submit"
 						class="w-full bg-indigo-600 text-white rounded-md py-2 font-medium hover:bg-indigo-700">
@@ -32,6 +38,7 @@ templ Login(errorMsg string) {
 					</button>
 				</form>
 			</div>
+			<script type="module" src="/web/static/login.js"></script>
 		</body>
 	</html>
 }

internal/web/templates/login_templ.go

@@ -52,7 +52,7 @@ func Login(errorMsg string) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, "<form method=\"POST\" action=\"/web/login\" class=\"space-y-4\"><div><label for=\"username\" class=\"block text-sm font-medium text-gray-700\">Username</label> <input id=\"username\" name=\"username\" type=\"text\" required autofocus class=\"mt-1 block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500\"></div><div><label for=\"password\" class=\"block text-sm font-medium text-gray-700\">Password</label> <input id=\"password\" name=\"password\" type=\"password\" required class=\"mt-1 block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500\"></div><button type=\"submit\" class=\"w-full bg-indigo-600 text-white rounded-md py-2 font-medium hover:bg-indigo-700\">Sign in</button></form></div></body></html>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 4, "<form method=\"POST\" action=\"/web/login\" class=\"space-y-4\"><div><label for=\"username\" class=\"block text-sm font-medium text-gray-700\">Username</label> <input id=\"username\" name=\"username\" type=\"text\" required autofocus class=\"mt-1 block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500\"></div><div><label for=\"password\" class=\"block text-sm font-medium text-gray-700\">Password</label><div class=\"mt-1 flex gap-2\"><input id=\"password\" name=\"password\" type=\"password\" required class=\"block w-full rounded-md border-gray-300 border px-3 py-2 shadow-sm focus:border-indigo-500 focus:ring-indigo-500\"> <button type=\"button\" id=\"toggle-password\" aria-pressed=\"false\" class=\"shrink-0 rounded-md border border-gray-300 px-3 py-2 text-sm text-gray-600 hover:bg-gray-50\">Show</button></div></div><button type=\"submit\" class=\"w-full bg-indigo-600 text-white rounded-md py-2 font-medium hover:bg-indigo-700\">Sign in</button></form></div><script type=\"module\" src=\"/web/static/login.js\"></script></body></html>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}

web/package-lock.json

@@ -7,7 +7,8 @@
       "name": "nidus-web",
       "devDependencies": {
         "@tailwindcss/cli": "^4.3.3",
-        "tailwindcss": "^4.3.3"
+        "tailwindcss": "^4.3.3",
+        "typescript": "^7.0.2"
       }
     },
     "node_modules/@jridgewell/gen-mapping": {
@@ -645,6 +646,346 @@
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       }
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+      "cpu": [
+        "ppc64"
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+      "dev": true,
+      "license": "Apache-2.0",
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+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/@typescript/typescript-win32-arm64/-/typescript-win32-arm64-7.0.2.tgz",
+      "integrity": "sha512-Gyl1Vy6OsWesLzmq+EP0Fb7b4Nid5232AvcA2SFcdYreldpNtYFFofPjnt62y9hQy7VTaZp65ICJjuAQRaVcIQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "Apache-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=16.20.0"
+      }
+    },
+    "node_modules/@typescript/typescript-win32-x64": {
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/@typescript/typescript-win32-x64/-/typescript-win32-x64-7.0.2.tgz",
+      "integrity": "sha512-0BQ3HkAHHlKLSp1qRvf3SUhGpGsDuhB/jgFw75guyqbxJqEaS0Cw/VFO8i2nHglJUzQCRtMMR/IBAKE3ETMC4g==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "Apache-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=16.20.0"
+      }
+    },
     "node_modules/braces": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
@@ -1123,6 +1464,41 @@
       "engines": {
         "node": ">=8.0"
       }
+    },
+    "node_modules/typescript": {
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-7.0.2.tgz",
+      "integrity": "sha512-8FYau96o3NKOhbjKi/qNvG/W5jhzxkbdm5sj9AbZ/5T5sWqn3hJgLfGx27sRKZWTvyzCP8dLRBTf5tBTSRVUNA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc"
+      },
+      "engines": {
+        "node": ">=16.20.0"
+      },
+      "optionalDependencies": {
+        "@typescript/typescript-aix-ppc64": "7.0.2",
+        "@typescript/typescript-darwin-arm64": "7.0.2",
+        "@typescript/typescript-darwin-x64": "7.0.2",
+        "@typescript/typescript-freebsd-arm64": "7.0.2",
+        "@typescript/typescript-freebsd-x64": "7.0.2",
+        "@typescript/typescript-linux-arm": "7.0.2",
+        "@typescript/typescript-linux-arm64": "7.0.2",
+        "@typescript/typescript-linux-loong64": "7.0.2",
+        "@typescript/typescript-linux-mips64el": "7.0.2",
+        "@typescript/typescript-linux-ppc64": "7.0.2",
+        "@typescript/typescript-linux-riscv64": "7.0.2",
+        "@typescript/typescript-linux-s390x": "7.0.2",
+        "@typescript/typescript-linux-x64": "7.0.2",
+        "@typescript/typescript-netbsd-arm64": "7.0.2",
+        "@typescript/typescript-netbsd-x64": "7.0.2",
+        "@typescript/typescript-openbsd-arm64": "7.0.2",
+        "@typescript/typescript-openbsd-x64": "7.0.2",
+        "@typescript/typescript-sunos-x64": "7.0.2",
+        "@typescript/typescript-win32-arm64": "7.0.2",
+        "@typescript/typescript-win32-x64": "7.0.2"
+      }
     }
   }
 }

web/package.json

@@ -3,10 +3,13 @@
   "private": true,
   "scripts": {
     "build:css": "tailwindcss -i ./input.css -o ./static/app.css --minify",
-    "watch:css": "tailwindcss -i ./input.css -o ./static/app.css --watch"
+    "watch:css": "tailwindcss -i ./input.css -o ./static/app.css --watch",
+    "build:ts": "tsc -p tsconfig.json",
+    "watch:ts": "tsc -p tsconfig.json --watch"
   },
   "devDependencies": {
+    "@tailwindcss/cli": "^4.3.3",
     "tailwindcss": "^4.3.3",
-    "@tailwindcss/cli": "^4.3.3"
+    "typescript": "^7.0.2"
   }
 }

web/static/login.js

@@ -0,0 +1,17 @@
+"use strict";
+// Login page behavior: adds a "show password" toggle so users can rule
+// out typos before submitting. Compiled to web/static/login.js via
+// `make web-js` (see web/tsconfig.json).
+(function initPasswordToggle() {
+    const passwordInput = document.getElementById("password");
+    const toggleButton = document.getElementById("toggle-password");
+    if (!passwordInput || !toggleButton) {
+        return;
+    }
+    toggleButton.addEventListener("click", () => {
+        const showing = passwordInput.type === "text";
+        passwordInput.type = showing ? "password" : "text";
+        toggleButton.textContent = showing ? "Show" : "Hide";
+        toggleButton.setAttribute("aria-pressed", showing ? "false" : "true");
+    });
+})();

web/ts/login.ts

@@ -0,0 +1,17 @@
+// Login page behavior: adds a "show password" toggle so users can rule
+// out typos before submitting. Compiled to web/static/login.js via
+// `make web-js` (see web/tsconfig.json).
+(function initPasswordToggle(): void {
+	const passwordInput = document.getElementById("password") as HTMLInputElement | null;
+	const toggleButton = document.getElementById("toggle-password") as HTMLButtonElement | null;
+	if (!passwordInput || !toggleButton) {
+		return;
+	}
+
+	toggleButton.addEventListener("click", () => {
+		const showing = passwordInput.type === "text";
+		passwordInput.type = showing ? "password" : "text";
+		toggleButton.textContent = showing ? "Show" : "Hide";
+		toggleButton.setAttribute("aria-pressed", showing ? "false" : "true");
+	});
+})();

web/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "es2020",
+    "lib": ["ES2020", "DOM"],
+    "strict": true,
+    "noEmitOnError": true,
+    "rootDir": "./ts",
+    "outDir": "./static"
+  },
+  "include": ["ts/**/*.ts"]
+}