add component_inventory.md with legal pages, MietanfragePage, extended AdminPage

docs/component_inventory.md

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+# HMS Licht & Ton – Component Inventory
+
+## Overview
+All components are built as Vue 3 single-file components (template + setup). In production (Nuxt 3), these map to `.vue` files in `components/` and `pages/` directories.
+
+## Shared Components
+
+### HmsLogo
+- **Purpose:** SVG logo with white HMS text + orange (#EC6925) rectangular border
+- **Props:** `size` (Number, default: 40)
+- **States:** Default only (static SVG)
+- **Accessibility:** `aria-label`, `role="img"`
+
+### SpeakerIcon
+- **Purpose:** SVG loudspeaker/light icon for equipment grid
+- **Props:** `type` (String: linearray, subwoofer, monitor, pointsource, column, movinghead)
+- **States:** Default (gray), Hover (orange via parent CSS)
+- **Accessibility:** `aria-hidden="true"`
+
+### AppHeader
+- **Purpose:** Sticky navigation header with logo, desktop nav, mobile hamburger menu
+- **States:** Default, Active nav item (`aria-current="page"`), Mobile menu open/closed
+- **Accessibility:** `role="banner"`, `aria-label`, `aria-expanded`, `aria-controls`
+
+### AppFooter
+- **Purpose:** 4-column footer with company info, navigation, contact, legal links
+- **States:** Default only
+- **Accessibility:** `role="contentinfo"`
+
+### ServiceCard
+- **Purpose:** Service offering card with icon, title, description
+- **Props:** `icon`, `title`, `description`
+- **States:** Default, Hover (border highlight)
+
+### EquipmentCard
+- **Purpose:** Equipment listing card with image, badge, name, description, add-to-cart button
+- **Props:** `item` (Object: id, code, name, category, description, brand, image)
+- **Emits:** `click`, `add-to-cart`
+- **States:** Default, Hover (border + shadow + lift), Focus (keyboard), No image (placeholder)
+- **Accessibility:** `role="article"`, `tabindex="0"`, `aria-label` on add button
+
+### LoadingSkeleton
+- **Purpose:** Shimmer animation skeleton cards for loading states
+- **Props:** `count` (Number, default: 6)
+- **States:** Shimmer animation (infinite)
+- **Accessibility:** `aria-live="polite"`, `aria-busy="true"`
+
+### EmptyState
+- **Purpose:** Empty state with icon, title, message, optional CTA button
+- **Props:** `icon`, `title`, `message`, `actionLabel`
+- **Emits:** `action`
+- **States:** Default
+- **Accessibility:** `role="status"`
+
+### ErrorState
+- **Purpose:** Error state with alert icon, title, message, retry button
+- **Props:** `title`, `message`
+- **Emits:** `retry`
+- **States:** Default
+- **Accessibility:** `role="alert"`
+
+### LegalContentPage
+- **Purpose:** Reusable layout for static legal content pages (Impressum, Datenschutz, AGB)
+- **Props:** `title` (String), `content` (String/HTML)
+- **States:** loading (skeleton), content (rendered)
+- **Accessibility:** `role="article"`, semantic heading structure h1 > h2 > h3
+
+## Page Components
+
+### HomePage (`#/`)
+- **Sections:** Hero (bg image + overlay), Speaker Grid (6 types), Über uns (stats + image), 8 Service Cards, Mietkatalog CTA
+- **States:** Default (all content static)
+
+### ReferenzenPage (`#/referenzen`)
+- **States:** Loading (skeleton), Loaded (gallery grid), Error (retry), Empty (no category results)
+- **Features:** Category filter chips (Alle, Open-Air, Indoor, Rigging, Event), 9 real HMS photos
+
+### KontaktPage (`#/kontakt`)
+- **Sections:** Büro/Lager/Öffnungszeiten cards, 2 Ansprechpartner cards, Contact form
+- **Form States:** Default, Validation errors (inline), Submitting (spinner), Submitted (success message)
+- **Validation:** Name*, Email* (regex), Message*, Privacy checkbox*
+
+### MietkatalogPage (`#/mietkatalog`)
+- **States:** Loading (skeleton), Loaded (equipment grid), Error (retry), Empty (no search results)
+- **Features:** Search input, Category filter chips (7 categories), Sort dropdown (name/brand/code), Result count
+
+### EquipmentDetailPage (`#/mietkatalog/:id`)
+- **States:** Loading (skeleton), Loaded (detail view), Error (not found)
+- **Sections:** Image/placeholder, Specs table, Rental form (date range + quantity), Related items grid
+- **Form:** Mietbeginn, Mietende, Anzahl (stepper), Add to cart button
+
+### WarenkorbPage (`#/warenkorb`)
+- **States:** Empty (no items), Cart with items
+- **Features:** Item list with quantity steppers, remove buttons, rental dates display, CTA button → /mietanfrage
+- **Note:** Warenkorb verwaltet nur Items (anzeigen, Mengen steuern, entfernen). Kein Formular für Kontaktdaten hier.
+- **Accessibility:** Cart summary with live-updating totals, `aria-live="polite"`
+
+### MietanfragePage (`#/mietanfrage`)
+- **Purpose:** Mietanfrage-Formular mit Veranstaltungsdaten + Kontaktdaten + Nachricht. Submit sendet an Rentman via POST /projectrequests + POST /projectrequests/{id}/projectrequestequipment.
+- **Sections:**
+  1. **Warenkorb-Übersicht:** Zeigt ausgewählte Artikel mit Mengen (read-only), Link zurück zum Warenkorb
+  2. **Veranstaltungsdaten:** Name*, Datum von*, Datum bis*, Ort*, Anzahl Personen
+  3. **Kontaktdaten:** Name*, Firma, E-Mail*, Telefon, Adresse (Straße, PLZ, Ort)
+  4. **Nachricht:** Freitext-Nachrichtfeld
+  5. **Submit:** "Mietanfrage absenden" Button
+- **States:**
+  - `form` – Default, Formular leer oder mit Validierungs-Hinweisen
+  - `validation-error` – Inline-Validierungsfehler (Pflichtfelder markiert, Fehlermeldungen unter den Feldern)
+  - `submitting` – Spinner im Submit-Button, Felder disabled
+  - `success` – Erfolgsmeldung mit Referenz-Nummer, Weiter-Button ("Zurück zur Startseite")
+  - `error` – Fehlermeldung mit Retry-Button ("Erneut versuchen")
+- **Empty Cart Handling:** Wenn Warenkorb leer → Hinweis "Keine Artikel ausgewählt" + Link zum Mietkatalog
+- **Validation:**
+  - Veranstaltungsname: Pflicht, min 3 Zeichen
+  - Datum von/bis: Pflicht, von ≤ bis
+  - Ort: Pflicht
+  - Name: Pflicht, min 2 Zeichen
+  - E-Mail: Pflicht, Regex-Validierung
+  - Telefon: Optional, Format-Validierung
+  - Adresse: Optional (aber wenn PLZ angegeben, auch Ort erforderlich)
+- **Accessibility:** `role="form"`, `aria-invalid` on error fields, `aria-describedby` for error messages, fieldset/legend for grouped sections
+
+### AdminPage (`#/admin`)
+- **Purpose:** Admin-Login und post-login Dashboard mit Equipment-Sync-Trigger
+- **States:**
+  - `login` – Login-Form (Username + Password), Fehler bei falschen Daten
+  - `idle` – Post-Login Dashboard, Sync-Status sichtbar, Sync-Button bereit
+  - `syncing` – Sync läuft, Progress-Indicator, Sync-Log live aktualisiert
+  - `sync-complete` – Sync abgeschlossen, Status aktualisiert (last sync date, article count), Erfolgsmeldung
+  - `sync-error` – Sync fehlgeschlagen, Fehlermeldung + Retry-Button, Sync-Log zeigt Fehlerdetails
+- **Elements:**
+  - **Sync-Trigger Button:** "Equipment-Sync starten" (Primary, disabled während syncing)
+  - **Sync-Status:** Last sync date, article count, Sync-Status-Badge (idle/syncing/complete/error)
+  - **Sync-Log Viewer:** Scrollbarer Log-Bereich mit Zeitstempeln, kollabierbar
+- **Login-Form States:** Default, Validation error (invalid credentials), Loading (spinner)
+- **Accessibility:** `role="main"`, `aria-live="polite"` für Sync-Status, `aria-busy` während syncing
+
+### ImpressumPage (`#/impressum`)
+- **Purpose:** Statische Impressum-Seite mit rechtlichen Angaben gemäß §5 TMG
+- **Route:** `/impressum`
+- **Content:** Firmenname, Vertretungsberechtigte, Anschrift, Kontakt, USt-IdNr., Verantwortlich für Inhalte
+- **States:** loading (skeleton), content (rendered)
+- **Component:** Verwendet `LegalContentPage` Layout
+- **Accessibility:** Semantic heading structure h1 > h2
+
+### DatenschutzPage (`#/datenschutz`)
+- **Purpose:** Statische Datenschutz-Seite mit DSGVO-konformer Datenschutzerklärung
+- **Route:** `/datenschutz`
+- **Content:** Server-Logfiles, Cookies, Kontaktformular-Datenverarbeitung, Rentman-Datenverarbeitung, Nutzerrechte
+- **States:** loading (skeleton), content (rendered)
+- **Component:** Verwendet `LegalContentPage` Layout
+- **Accessibility:** Semantic heading structure h1 > h2 > h3
+
+### AGBVermietungPage (`#/agb-vermietung`)
+- **Purpose:** Statische AGB-Seite für Vermietung
+- **Route:** `/agb-vermietung`
+- **Content:** Allgemeine Geschäftsbedingungen für Vermietung (vom User bereitgestellter Text)
+- **States:** loading (skeleton), content (rendered)
+- **Component:** Verwendet `LegalContentPage` Layout
+- **Accessibility:** Semantic heading structure h1 > h2
+
+### NotFoundPage (`#/404`)
+- **States:** Default (404 message + home link)
+
+## UX State Coverage Summary
+
+| Page | Loading | Empty | Error | Partial | Success | Additional States |
+|------|---------|-------|-------|---------|---------|------------------|
+| Home | – | – | – | – | – | – |
+| Referenzen | Skeleton | No category | Retry | Filtered | – | – |
+| Kontakt | – | – | – | – | Form sent | validation-error |
+| Mietkatalog | Skeleton | No results | Retry | Filtered | – | – |
+| Detail | Skeleton | – | Not found | – | – | – |
+| Warenkorb | – | Empty cart | – | – | – | – |
+| Mietanfrage | – | Empty cart | Retry | – | Request sent | form, submitting, validation-error |
+| Admin | Spinner | – | Login error | – | Logged in | idle, syncing, sync-complete, sync-error |
+| Impressum | Skeleton | – | – | – | – | content |
+| Datenschutz | Skeleton | – | – | – | – | content |
+| AGB Vermietung | Skeleton | – | – | – | – | content |
+| 404 | – | – | – | – | – | – |
+
+## Component States Documentation
+
+### Button States
+- **Default:** `background: var(--color-accent); color: white`
+- **Hover:** `background: var(--color-accent-hover)`
+- **Active:** `transform: translateY(0)`
+- **Disabled:** `background: var(--secondary); cursor: not-allowed`
+- **Focus-visible:** `outline: 2px solid var(--color-accent); outline-offset: 2px`
+
+### Input States
+- **Default:** `border: 1px solid var(--border-strong); background: var(--surface)`
+- **Focus:** `border-color: var(--color-accent); box-shadow: 0 0 0 2px rgba(236,105,37,0.1)`
+- **Error:** `border-color: var(--color-error)`
+- **Disabled:** `background: var(--row); color: var(--secondary); cursor: not-allowed`
+
+### Card States
+- **Default:** `border: 1px solid var(--border); box-shadow: var(--shadow-sm)`
+- **Hover:** `border-color: var(--secondary); box-shadow: var(--shadow-lg)`
+
+### Chip States
+- **Default:** `border: 1px solid var(--border-strong); background: var(--surface)`
+- **Hover:** `border-color: var(--secondary)`
+- **Active:** `background: var(--color-accent); color: white; border-color: var(--color-accent)`
+
+### Sync-Status Badge States (AdminPage)
+- **Idle:** `background: var(--surface); color: var(--text-muted)`
+- **Syncing:** `background: rgba(96, 165, 250, 0.08); color: var(--color-info); animation: pulse`
+- **Complete:** `background: var(--color-success-bg); color: var(--color-success)`
+- **Error:** `background: var(--color-error-bg); color: var(--color-error)`