docs: address Login Flow v2 review feedback

Fix issues raised by reviewer on PR #743:

- troubleshooting.md: renumber "Getting Help" steps (4→3, 5→4) after
  earlier consolidation left a gap
- installation.md: drop stale "OIDC app" prerequisite; admin access is
  now optional under Login Flow v2 (works on stock Nextcloud 16+)
- semantic-search-architecture.md: rename VECTOR_SYNC_ENABLED to
  ENABLE_SEMANTIC_SEARCH in the Status callout (renamed in v0.58.0)
- configuration.md: remove Quick Start references to deprecated
  oauth-multi-user / oauth-advanced templates and point to
  login-flow-v2.md; update "OAuth, Multi-User BasicAuth" label to
  "Login Flow v2, Multi-User BasicAuth"
- auth-flows.md: fix background-sync diagram so Encrypt+persist step
  no longer crosses into the Nextcloud column

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/auth-flows.md

@@ -94,7 +94,7 @@ Astrolabe                     MCP Server                   Nextcloud
     │                             │                            │
     │── Store app password ──────▶│                            │
     │   (via management API)      │                            │
-    │                             │── Encrypt + persist ──────▶│
+    │                             │ [Encrypt + persist locally]│
     │                             │  (SQLite, Fernet)          │
     │◀── Confirmation ────────────│                            │
     │                             │                            │

docs/configuration.md

@@ -11,15 +11,16 @@ We provide mode-specific configuration templates for quick setup:
 ```bash
 # Choose a template based on your deployment mode:
 cp env.sample.single-user .env         # Simplest - one user, local dev
-cp env.sample.oauth-multi-user .env    # Recommended - multi-user OAuth
-cp env.sample.oauth-advanced .env      # Advanced - token exchange mode
+cp env.sample .env                     # Full reference with all options
 
-# Or start from the full example:
-cp env.sample .env
+# For multi-user Login Flow v2 (recommended), see the dedicated guide:
+# docs/login-flow-v2.md#setup
 
 # Edit .env with your Nextcloud details
 ```
 
+> **Note:** The legacy templates `env.sample.oauth-multi-user` and `env.sample.oauth-advanced` configure the deprecated direct-OAuth-to-Nextcloud modes. New deployments should use [Login Flow v2](login-flow-v2.md) for multi-user setups.
+
 Then choose your deployment mode:
 
 - [Single-User BasicAuth](#single-user-basicauth-mode) - Simplest for personal instances
@@ -210,7 +211,7 @@ QDRANT_URL=http://qdrant:6333
 OLLAMA_BASE_URL=http://ollama:11434
 ```
 
-> **Note:** In multi-user modes (OAuth, Multi-User BasicAuth), enabling `ENABLE_SEMANTIC_SEARCH` automatically enables background operations and refresh token storage. You don't need to set `ENABLE_BACKGROUND_OPERATIONS` separately!
+> **Note:** In multi-user modes (Login Flow v2, Multi-User BasicAuth), enabling `ENABLE_SEMANTIC_SEARCH` automatically enables background operations and refresh token storage. You don't need to set `ENABLE_BACKGROUND_OPERATIONS` separately!
 
 ### Qdrant Vector Database Modes
 

docs/installation.md

@@ -6,7 +6,7 @@ This guide covers installing the Nextcloud MCP server on your system.
 
 - **Python 3.11+** - Check with `python3 --version`
 - **Access to a Nextcloud instance** - Self-hosted or cloud-hosted
-- **Administrator access** (for OAuth setup) - Required to install OIDC app
+- **Administrator access** *(optional)* - Only needed to customise app-password policies in Nextcloud settings; not required for any deployment mode (single-user, multi-user BasicAuth, or Login Flow v2)
 
 ## Installation Methods
 

docs/semantic-search-architecture.md

@@ -4,7 +4,7 @@ This document explains the architecture of the semantic search feature in the Ne
 
 > [!IMPORTANT]
 > **Status: Experimental**
-> - Disabled by default (`VECTOR_SYNC_ENABLED=false`)
+> - Disabled by default (`ENABLE_SEMANTIC_SEARCH=false`)
 > - Currently supports **Notes, Files (PDFs), News items, and Deck cards**
 > - Requires additional infrastructure (Qdrant vector database + Ollama embedding service)
 > - RAG answer generation requires MCP client sampling support

docs/troubleshooting.md

@@ -423,7 +423,7 @@ curl -u "$NEXTCLOUD_USERNAME:$NEXTCLOUD_PASSWORD" \
 
 For Login Flow v2 mode, see [Login Flow v2 troubleshooting](login-flow-v2.md#troubleshooting).
 
-### 4. Check Versions
+### 3. Check Versions
 
 ```bash
 # MCP Server version
@@ -435,7 +435,7 @@ python3 --version
 # Nextcloud version (check in admin panel)
 ```
 
-### 5. Open an Issue
+### 4. Open an Issue
 
 If problems persist, open an issue on the [GitHub repository](https://github.com/cbcoutinho/nextcloud-mcp-server/issues) with: