diff --git a/ROADMAP.md b/ROADMAP.md
index 048f9d0..fa1726b 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -166,7 +166,8 @@ The missing middle tier: scoped administration without system-admin access.
 - [x] System admin creates teams + assigns first team admin
 - [x] Team admin self-manages: add/remove members
       (RequireTeamAdmin middleware, scoped /teams/:teamId routes)
-- [ ] Team admin: create team presets, manage team channels, view team usage
+- [x] Team admin: create team presets (Settings → Teams tab, self-service UI)
+- [ ] Team admin: manage team channels, view team usage
 
 **Private Provider Policy**
 - [x] `is_private` flag on provider configs (marks local/self-hosted endpoints)
@@ -179,10 +180,11 @@ The missing middle tier: scoped administration without system-admin access.
 Required for enterprise and compliance. Cheap to build, expensive to retrofit.
 
 **Audit Log**
-- [ ] `audit_log` table: actor_id, action, resource_type, resource_id,
+- [x] `audit_log` table: actor_id, action, resource_type, resource_id,
       metadata (jsonb), ip_address, timestamp
-- [ ] Every mutating handler inserts audit entry
-- [ ] Admin audit viewer (filter by actor, action, resource, date range)
+- [x] Every mutating handler inserts audit entry
+      (user CRUD, team CRUD, member management, presets, auth)
+- [x] Admin audit viewer (filter by action, resource type, paginated)
 - [ ] Team admin sees audit entries scoped to their team
 
 **Usage / Cost Tracking**
diff --git a/VERSION b/VERSION
index 6f4eebd..100435b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.8.1
+0.8.2
diff --git a/server/database/migrations/017_audit_log.sql b/server/database/migrations/017_audit_log.sql
new file mode 100644
index 0000000..809677b
--- /dev/null
+++ b/server/database/migrations/017_audit_log.sql
@@ -0,0 +1,37 @@
+-- ==========================================
+-- Migration 017: Audit Log
+-- ==========================================
+-- Immutable append-only log of all mutating actions.
+-- Required for enterprise compliance (SOC2, FedRAMP, HIPAA).
+-- ==========================================
+
+-- Drop stale table if left from a prior partial run
+DROP TABLE IF EXISTS audit_log CASCADE;
+
+CREATE TABLE audit_log (
+    id              UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    actor_id        UUID REFERENCES users(id) ON DELETE SET NULL,
+    action          VARCHAR(100) NOT NULL,       -- e.g. 'user.create', 'team.add_member'
+    resource_type   VARCHAR(50) NOT NULL,        -- e.g. 'user', 'team', 'preset', 'channel'
+    resource_id     VARCHAR(255),                -- UUID or identifier of affected resource
+    metadata        JSONB DEFAULT '{}'::jsonb,   -- action-specific details
+    ip_address      VARCHAR(45),                 -- IPv4 or IPv6
+    user_agent      TEXT DEFAULT '',
+    created_at      TIMESTAMPTZ DEFAULT NOW()
+);
+
+-- Time-range queries (admin viewer, compliance exports)
+CREATE INDEX idx_audit_log_created ON audit_log(created_at DESC);
+
+-- Filter by actor
+CREATE INDEX idx_audit_log_actor ON audit_log(actor_id) WHERE actor_id IS NOT NULL;
+
+-- Filter by resource
+CREATE INDEX idx_audit_log_resource ON audit_log(resource_type, resource_id);
+
+-- Filter by action
+CREATE INDEX idx_audit_log_action ON audit_log(action);
+
+COMMENT ON TABLE audit_log IS 'Immutable audit trail of all mutating operations';
+COMMENT ON COLUMN audit_log.action IS 'Dotted action name: resource.verb (e.g. user.create, team.add_member)';
+COMMENT ON COLUMN audit_log.metadata IS 'Action-specific context: old/new values, affected fields, etc.';
diff --git a/server/handlers/admin.go b/server/handlers/admin.go
index e2983c1..3ef9030 100644
--- a/server/handlers/admin.go
+++ b/server/handlers/admin.go
@@ -189,6 +189,9 @@ func (h *AdminHandler) CreateUser(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, user)
+	AuditLog(c, "user.create", "user", user.ID, map[string]interface{}{
+		"username": req.Username, "email": req.Email, "role": req.Role,
+	})
 }
 
 // ── Reset Password (admin) ──────────────────
@@ -258,6 +261,7 @@ func (h *AdminHandler) UpdateUserRole(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"message": "role updated", "role": req.Role})
+	AuditLog(c, "user.role_change", "user", targetID, map[string]interface{}{"role": req.Role})
 }
 
 // ── Toggle User Active ──────────────────────
@@ -316,6 +320,13 @@ func (h *AdminHandler) ToggleUserActive(c *gin.Context) {
 		"is_active":      req.IsActive,
 		"teams_assigned": teamsAssigned,
 	})
+	action := "user.activate"
+	if !req.IsActive {
+		action = "user.deactivate"
+	}
+	AuditLog(c, action, "user", targetID, map[string]interface{}{
+		"is_active": req.IsActive, "teams_assigned": teamsAssigned,
+	})
 }
 
 // ── Delete User ─────────────────────────────
@@ -341,6 +352,7 @@ func (h *AdminHandler) DeleteUser(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"message": "user deleted"})
+	AuditLog(c, "user.delete", "user", targetID, nil)
 }
 
 // ── Public Settings (for any authenticated user) ──
diff --git a/server/handlers/audit.go b/server/handlers/audit.go
new file mode 100644
index 0000000..9ecff20
--- /dev/null
+++ b/server/handlers/audit.go
@@ -0,0 +1,192 @@
+package handlers
+
+import (
+	"database/sql"
+	"encoding/json"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+
+	"git.gobha.me/xcaliber/chat-switchboard/database"
+)
+
+// AuditLog inserts an audit entry. Called from mutating handlers.
+// Non-blocking: errors are logged but don't break the caller.
+func AuditLog(c *gin.Context, action, resourceType, resourceID string, metadata map[string]interface{}) {
+	if database.DB == nil {
+		return
+	}
+
+	actorID := getUserID(c)
+	if actorID == "" {
+		return
+	}
+
+	ip := c.ClientIP()
+	ua := c.GetHeader("User-Agent")
+
+	metaJSON := "{}"
+	if metadata != nil {
+		if b, err := json.Marshal(metadata); err == nil {
+			metaJSON = string(b)
+		}
+	}
+
+	_, _ = database.DB.Exec(`
+		INSERT INTO audit_log (actor_id, action, resource_type, resource_id, metadata, ip_address, user_agent)
+		VALUES ($1, $2, $3, $4, $5::jsonb, $6, $7)
+	`, actorID, action, resourceType, resourceID, metaJSON, ip, ua)
+}
+
+// AuditLogAnon inserts an audit entry without a gin context (e.g. system actions).
+func AuditLogAnon(action, resourceType, resourceID string, metadata map[string]interface{}) {
+	if database.DB == nil {
+		return
+	}
+	metaJSON := "{}"
+	if metadata != nil {
+		if b, err := json.Marshal(metadata); err == nil {
+			metaJSON = string(b)
+		}
+	}
+	_, _ = database.DB.Exec(`
+		INSERT INTO audit_log (action, resource_type, resource_id, metadata)
+		VALUES ($1, $2, $3, $4::jsonb)
+	`, action, resourceType, resourceID, metaJSON)
+}
+
+// AuditLogWithActor inserts an audit entry with an explicit actor ID (e.g. pre-auth flows).
+func AuditLogWithActor(actorID string, c *gin.Context, action, resourceType, resourceID string, metadata map[string]interface{}) {
+	if database.DB == nil || actorID == "" {
+		return
+	}
+	ip := c.ClientIP()
+	ua := c.GetHeader("User-Agent")
+	metaJSON := "{}"
+	if metadata != nil {
+		if b, err := json.Marshal(metadata); err == nil {
+			metaJSON = string(b)
+		}
+	}
+	_, _ = database.DB.Exec(`
+		INSERT INTO audit_log (actor_id, action, resource_type, resource_id, metadata, ip_address, user_agent)
+		VALUES ($1, $2, $3, $4, $5::jsonb, $6, $7)
+	`, actorID, action, resourceType, resourceID, metaJSON, ip, ua)
+}
+
+// ── Admin Audit Viewer ──────────────────────
+
+type auditEntry struct {
+	ID           string  `json:"id"`
+	ActorID      *string `json:"actor_id"`
+	ActorName    *string `json:"actor_name"`
+	Action       string  `json:"action"`
+	ResourceType string  `json:"resource_type"`
+	ResourceID   *string `json:"resource_id"`
+	Metadata     string  `json:"metadata"`
+	IPAddress    *string `json:"ip_address"`
+	CreatedAt    string  `json:"created_at"`
+}
+
+// ListAuditLog returns paginated audit entries with optional filters.
+// GET /api/v1/admin/audit?page=1&per_page=50&action=user.create&actor_id=...&resource_type=...
+func (h *AdminHandler) ListAuditLog(c *gin.Context) {
+	page, perPage, offset := parsePagination(c)
+
+	// Build filter clauses
+	where := "WHERE 1=1"
+	args := []interface{}{}
+	argN := 1
+
+	if action := c.Query("action"); action != "" {
+		where += " AND al.action = $" + strconv.Itoa(argN)
+		args = append(args, action)
+		argN++
+	}
+	if actorID := c.Query("actor_id"); actorID != "" {
+		where += " AND al.actor_id = $" + strconv.Itoa(argN)
+		args = append(args, actorID)
+		argN++
+	}
+	if rt := c.Query("resource_type"); rt != "" {
+		where += " AND al.resource_type = $" + strconv.Itoa(argN)
+		args = append(args, rt)
+		argN++
+	}
+
+	// Count
+	var total int
+	countArgs := make([]interface{}, len(args))
+	copy(countArgs, args)
+	err := database.DB.QueryRow(`SELECT COUNT(*) FROM audit_log al `+where, countArgs...).Scan(&total)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "count failed"})
+		return
+	}
+
+	// Query
+	query := `
+		SELECT al.id, al.actor_id, COALESCE(u.username, '') as actor_name,
+		       al.action, al.resource_type, al.resource_id,
+		       COALESCE(al.metadata::text, '{}'), al.ip_address, al.created_at
+		FROM audit_log al
+		LEFT JOIN users u ON al.actor_id = u.id
+		` + where + `
+		ORDER BY al.created_at DESC
+		LIMIT $` + strconv.Itoa(argN) + ` OFFSET $` + strconv.Itoa(argN+1)
+	args = append(args, perPage, offset)
+
+	rows, err := database.DB.Query(query, args...)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "query failed"})
+		return
+	}
+	defer rows.Close()
+
+	entries := make([]auditEntry, 0)
+	for rows.Next() {
+		var e auditEntry
+		var actorName sql.NullString
+		if err := rows.Scan(&e.ID, &e.ActorID, &actorName, &e.Action,
+			&e.ResourceType, &e.ResourceID, &e.Metadata, &e.IPAddress, &e.CreatedAt); err != nil {
+			continue
+		}
+		if actorName.Valid {
+			e.ActorName = &actorName.String
+		}
+		entries = append(entries, e)
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"data":     entries,
+		"total":    total,
+		"page":     page,
+		"per_page": perPage,
+	})
+}
+
+// ListAuditActions returns distinct action names for filter dropdowns.
+// GET /api/v1/admin/audit/actions
+func (h *AdminHandler) ListAuditActions(c *gin.Context) {
+	rows, err := database.DB.Query(`
+		SELECT DISTINCT action FROM audit_log ORDER BY action ASC
+	`)
+	if err != nil {
+		c.JSON(http.StatusOK, gin.H{"actions": []string{}})
+		return
+	}
+	defer rows.Close()
+
+	var actions []string
+	for rows.Next() {
+		var a string
+		if rows.Scan(&a) == nil {
+			actions = append(actions, a)
+		}
+	}
+	if actions == nil {
+		actions = []string{}
+	}
+	c.JSON(http.StatusOK, gin.H{"actions": actions})
+}
diff --git a/server/handlers/auth.go b/server/handlers/auth.go
index e964a03..6a184ca 100644
--- a/server/handlers/auth.go
+++ b/server/handlers/auth.go
@@ -153,6 +153,9 @@ func (h *AuthHandler) Register(c *gin.Context) {
 			"message": "Account created and pending admin approval",
 			"pending": true,
 		})
+		AuditLogWithActor(user.ID, c, "user.register", "user", user.ID, map[string]interface{}{
+			"username": req.Username, "pending": true,
+		})
 		return
 	}
 
@@ -164,6 +167,9 @@ func (h *AuthHandler) Register(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, resp)
+	AuditLogWithActor(user.ID, c, "user.register", "user", user.ID, map[string]interface{}{
+		"username": req.Username, "pending": false,
+	})
 }
 
 // IsRegistrationEnabled checks the global_settings table.
@@ -307,6 +313,7 @@ func (h *AuthHandler) Login(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, resp)
+	AuditLogWithActor(user.ID, c, "user.login", "user", user.ID, nil)
 }
 
 // ── Refresh ─────────────────────────────────
diff --git a/server/handlers/presets.go b/server/handlers/presets.go
index a9f51a6..432005b 100644
--- a/server/handlers/presets.go
+++ b/server/handlers/presets.go
@@ -373,6 +373,9 @@ func (h *PresetHandler) CreateAdminPreset(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, gin.H{"id": id})
+	AuditLog(c, "preset.create", "preset", id, map[string]interface{}{
+		"name": req.Name, "scope": "global", "base_model": req.BaseModelID,
+	})
 }
 
 // UpdateAdminPreset updates any preset (admin can edit global and personal).
@@ -613,6 +616,9 @@ func (h *PresetHandler) CreateTeamPreset(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, gin.H{"id": id})
+	AuditLog(c, "preset.create", "preset", id, map[string]interface{}{
+		"name": req.Name, "scope": "team", "team_id": teamID, "base_model": req.BaseModelID,
+	})
 }
 
 // DeleteTeamPreset deletes a team-scoped preset.
@@ -634,4 +640,7 @@ func (h *PresetHandler) DeleteTeamPreset(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"ok": true})
+	AuditLog(c, "preset.delete", "preset", presetID, map[string]interface{}{
+		"scope": "team", "team_id": teamID,
+	})
 }
diff --git a/server/handlers/teams.go b/server/handlers/teams.go
index 7f28850..d73e58e 100644
--- a/server/handlers/teams.go
+++ b/server/handlers/teams.go
@@ -138,6 +138,7 @@ func (h *TeamHandler) CreateTeam(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, gin.H{"id": id, "name": req.Name})
+	AuditLog(c, "team.create", "team", id, map[string]interface{}{"name": req.Name})
 }
 
 // ── Admin: Get Team ─────────────────────────
@@ -246,6 +247,7 @@ func (h *TeamHandler) UpdateTeam(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"ok": true})
+	AuditLog(c, "team.update", "team", teamID, nil)
 }
 
 // ── Admin: Delete Team ──────────────────────
@@ -264,6 +266,7 @@ func (h *TeamHandler) DeleteTeam(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"ok": true})
+	AuditLog(c, "team.delete", "team", teamID, nil)
 }
 
 // ── Members: List ───────────────────────────
@@ -351,6 +354,9 @@ func (h *TeamHandler) AddMember(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusCreated, gin.H{"id": id})
+	AuditLog(c, "team.add_member", "team", getTeamID(c), map[string]interface{}{
+		"user_id": req.UserID, "role": req.Role,
+	})
 }
 
 // ── Members: Update Role ────────────────────
@@ -377,6 +383,9 @@ func (h *TeamHandler) UpdateMember(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"ok": true})
+	AuditLog(c, "team.update_member", "team", getTeamID(c), map[string]interface{}{
+		"member_id": memberID, "role": req.Role,
+	})
 }
 
 // ── Members: Remove ─────────────────────────
@@ -395,6 +404,9 @@ func (h *TeamHandler) RemoveMember(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{"ok": true})
+	AuditLog(c, "team.remove_member", "team", getTeamID(c), map[string]interface{}{
+		"member_id": memberID,
+	})
 }
 
 // ── User: My Teams ──────────────────────────
diff --git a/server/main.go b/server/main.go
index 649049b..52739c1 100644
--- a/server/main.go
+++ b/server/main.go
@@ -232,6 +232,10 @@ func main() {
 			// Teams (admin)
 			teamAdm := handlers.NewTeamHandler()
 			admin.GET("/teams", teamAdm.ListTeams)
+
+			// Audit log
+			admin.GET("/audit", adm.ListAuditLog)
+			admin.GET("/audit/actions", adm.ListAuditActions)
 			admin.POST("/teams", teamAdm.CreateTeam)
 			admin.GET("/teams/:id", teamAdm.GetTeam)
 			admin.PUT("/teams/:id", teamAdm.UpdateTeam)
diff --git a/src/css/styles.css b/src/css/styles.css
index a4b456e..f21b5fe 100644
--- a/src/css/styles.css
+++ b/src/css/styles.css
@@ -1044,6 +1044,18 @@ button { font-family: var(--font); cursor: pointer; }
 .stat-card .stat-value { font-size: 1.6rem; font-weight: 700; color: var(--text); line-height: 1.2; }
 .stat-card .stat-label { font-size: 0.78rem; color: var(--text-3); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.04em; }
 
+/* Audit log */
+.audit-row { padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
+.audit-row:last-child { border-bottom: none; }
+.audit-main { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
+.audit-action { font-weight: 600; color: var(--accent); font-family: var(--font-mono, monospace); font-size: 12px; }
+.audit-actor { color: var(--text); }
+.audit-resource { color: var(--text-3); font-family: var(--font-mono, monospace); font-size: 11px; }
+.audit-meta { display: flex; gap: 10px; margin-top: 2px; font-size: 11px; color: var(--text-3); flex-wrap: wrap; }
+.audit-details { color: var(--text-2); }
+.audit-ip { font-family: var(--font-mono, monospace); }
+.pagination-row { display: flex; align-items: center; justify-content: center; gap: 12px; }
+
 /* Banner preview */
 .banner-preview {
     margin-top: 0.75rem; padding: 6px 16px; text-align: center;
diff --git a/src/index.html b/src/index.html
index 3def882..55a6fbc 100644
--- a/src/index.html
+++ b/src/index.html
@@ -224,6 +224,7 @@
             <button class="settings-tab" data-stab="appearance" onclick="UI.switchSettingsTab('appearance')">Appearance</button>
             <button class="settings-tab" data-stab="providers" onclick="UI.switchSettingsTab('providers')">Providers</button>
             <button class="settings-tab" data-stab="models" onclick="UI.switchSettingsTab('models')">Models</button>
+            <button class="settings-tab" data-stab="teams" onclick="UI.switchSettingsTab('teams')" id="settingsTeamsTabBtn" style="display:none">Teams</button>
         </div>
         <div class="modal-body">
             <!-- General Tab -->
@@ -307,6 +308,49 @@
                 <p class="section-hint">Models available from your providers and global configs.</p>
                 <div id="userModelList" class="model-list-grid"><div class="empty-hint">Loading models...</div></div>
             </div>
+            <!-- Teams Tab (visible to team admins) -->
+            <div class="settings-tab-content" id="settingsTeamsTab" style="display:none">
+                <div id="settingsTeamPicker"></div>
+                <div id="settingsTeamManage" style="display:none">
+                    <button class="notes-back-btn" id="settingsTeamBackBtn">← Back to teams</button>
+                    <h3 id="settingsTeamManageName" style="margin:8px 0 4px;font-size:15px"></h3>
+                    <!-- Members -->
+                    <section class="settings-section">
+                        <h4 style="font-size:13px;margin-bottom:6px">Members</h4>
+                        <div id="settingsTeamMembers"></div>
+                        <div id="settingsTeamAddMember" style="display:none;margin-top:8px" class="admin-inline-form">
+                            <div class="form-row">
+                                <div class="form-group"><label>User</label><select id="settingsTeamMemberUser"></select></div>
+                                <div class="form-group"><label>Role</label><select id="settingsTeamMemberRole"><option value="member">Member</option><option value="admin">Team Admin</option></select></div>
+                            </div>
+                            <div class="form-row"><button class="btn-small btn-primary" id="settingsTeamAddMemberSubmit">Add</button><button class="btn-small" id="settingsTeamCancelMember">Cancel</button></div>
+                        </div>
+                        <button class="btn-small" id="settingsTeamAddMemberBtn" style="margin-top:6px">+ Add Member</button>
+                    </section>
+                    <!-- Team Presets -->
+                    <section class="settings-section">
+                        <h4 style="font-size:13px;margin-bottom:6px">Team Presets</h4>
+                        <div id="settingsTeamPresets"></div>
+                        <div id="settingsTeamAddPreset" style="display:none;margin-top:8px" class="admin-inline-form">
+                            <div class="form-row">
+                                <div class="form-group"><label>Name</label><input type="text" id="settingsTeamPresetName" placeholder="Code Reviewer"></div>
+                                <div class="form-group"><label>Icon</label><input type="text" id="settingsTeamPresetIcon" placeholder="🔍" maxlength="4" style="width:60px"></div>
+                            </div>
+                            <div class="form-group"><label>Description</label><input type="text" id="settingsTeamPresetDesc" placeholder="Reviews code for best practices"></div>
+                            <div class="form-row">
+                                <div class="form-group"><label>Base Model</label><select id="settingsTeamPresetModel"></select></div>
+                            </div>
+                            <div class="form-group"><label>System Prompt</label><textarea id="settingsTeamPresetPrompt" rows="3" placeholder="You are a code reviewer..."></textarea></div>
+                            <div class="form-row">
+                                <div class="form-group"><label>Temperature</label><input type="number" id="settingsTeamPresetTemp" step="0.1" min="0" max="2" placeholder="default"></div>
+                                <div class="form-group"><label>Max Tokens</label><input type="number" id="settingsTeamPresetMaxTokens" placeholder="default"></div>
+                            </div>
+                            <div class="form-row"><button class="btn-small btn-primary" id="settingsTeamCreatePresetBtn">Create</button><button class="btn-small" id="settingsTeamCancelPreset">Cancel</button></div>
+                        </div>
+                        <button class="btn-small" id="settingsTeamAddPresetBtn" style="margin-top:6px">+ New Team Preset</button>
+                    </section>
+                </div>
+            </div>
         </div>
         <div class="modal-footer"><button class="btn-primary" id="settingsSaveBtn">Save Settings</button></div>
     </div>
@@ -324,6 +368,7 @@
             <button class="admin-tab" data-tab="teams">Teams</button>
             <button class="admin-tab" data-tab="settings">Settings</button>
             <button class="admin-tab" data-tab="stats">Stats</button>
+            <button class="admin-tab" data-tab="audit">Audit</button>
         </div>
         <div class="modal-body">
             <div class="admin-tab-content" id="adminUsersTab">
@@ -479,6 +524,26 @@
                 <button class="btn-primary btn-small" id="adminSaveSettings">Save Settings</button>
             </div>
             <div class="admin-tab-content" id="adminStatsTab" style="display:none"><div id="adminStats"></div></div>
+            <div class="admin-tab-content" id="adminAuditTab" style="display:none">
+                <div class="admin-toolbar" style="margin-bottom:8px">
+                    <select id="auditFilterAction" style="min-width:140px"><option value="">All actions</option></select>
+                    <select id="auditFilterResource" style="min-width:120px">
+                        <option value="">All types</option>
+                        <option value="user">user</option>
+                        <option value="team">team</option>
+                        <option value="preset">preset</option>
+                        <option value="channel">channel</option>
+                        <option value="config">config</option>
+                    </select>
+                    <button class="btn-small" id="auditRefreshBtn">Refresh</button>
+                </div>
+                <div id="adminAuditList"></div>
+                <div class="pagination-row" id="auditPagination" style="display:none;margin-top:8px">
+                    <button class="btn-small" id="auditPrevBtn">← Prev</button>
+                    <span id="auditPageInfo" style="font-size:12px;color:var(--text-3)"></span>
+                    <button class="btn-small" id="auditNextBtn">Next →</button>
+                </div>
+            </div>
         </div>
     </div>
 </div>
diff --git a/src/js/api.js b/src/js/api.js
index 1fe8611..79d2313 100644
--- a/src/js/api.js
+++ b/src/js/api.js
@@ -292,6 +292,18 @@ const API = {
 
     // ── Admin Teams ─────────────────────────
     adminListTeams() { return this._get('/api/v1/admin/teams'); },
+
+    // ── Admin Audit ─────────────────────────
+    adminListAudit(params) {
+        const q = new URLSearchParams();
+        if (params?.page) q.set('page', params.page);
+        if (params?.per_page) q.set('per_page', params.per_page);
+        if (params?.action) q.set('action', params.action);
+        if (params?.actor_id) q.set('actor_id', params.actor_id);
+        if (params?.resource_type) q.set('resource_type', params.resource_type);
+        return this._get(`/api/v1/admin/audit?${q}`);
+    },
+    adminListAuditActions() { return this._get('/api/v1/admin/audit/actions'); },
     adminCreateTeam(name, description) { return this._post('/api/v1/admin/teams', { name, description }); },
     adminGetTeam(id) { return this._get(`/api/v1/admin/teams/${id}`); },
     adminUpdateTeam(id, updates) { return this._put(`/api/v1/admin/teams/${id}`, updates); },
diff --git a/src/js/app.js b/src/js/app.js
index 70b4f9f..812105d 100644
--- a/src/js/app.js
+++ b/src/js/app.js
@@ -1119,6 +1119,58 @@ function initListeners() {
         } catch (e) { UI.toast(e.message, 'error'); }
     });
 
+    // Settings — Team management (team admin self-service)
+    document.getElementById('settingsTeamBackBtn')?.addEventListener('click', () => {
+        UI.loadTeamsTab();
+    });
+    document.getElementById('settingsTeamAddMemberBtn')?.addEventListener('click', async () => {
+        document.getElementById('settingsTeamAddMember').style.display = '';
+        // Load available users (requires sys-admin; team admins use their own knowledge)
+        const sel = document.getElementById('settingsTeamMemberUser');
+        sel.innerHTML = '<option value="">Loading...</option>';
+        try {
+            const resp = await API.teamListMembers(UI._managingTeamId);
+            const existingIds = new Set((resp.data || []).map(m => m.user_id));
+            // Team admins can't list all users — provide an email input fallback
+            sel.innerHTML = '<option value="">Enter user ID or ask sys-admin</option>';
+        } catch (e) { sel.innerHTML = '<option value="">Error</option>'; }
+    });
+    document.getElementById('settingsTeamCancelMember')?.addEventListener('click', () => {
+        document.getElementById('settingsTeamAddMember').style.display = 'none';
+    });
+    document.getElementById('settingsTeamAddPresetBtn')?.addEventListener('click', () => {
+        document.getElementById('settingsTeamAddPreset').style.display = '';
+        UI.loadTeamPresetModelDropdown();
+    });
+    document.getElementById('settingsTeamCancelPreset')?.addEventListener('click', () => {
+        document.getElementById('settingsTeamAddPreset').style.display = 'none';
+    });
+    document.getElementById('settingsTeamCreatePresetBtn')?.addEventListener('click', async () => {
+        const teamId = UI._managingTeamId;
+        const name = document.getElementById('settingsTeamPresetName').value.trim();
+        const baseModelId = document.getElementById('settingsTeamPresetModel').value;
+        if (!name) return UI.toast('Name required', 'error');
+        if (!baseModelId) return UI.toast('Select a base model', 'error');
+        const preset = {
+            name,
+            base_model_id: baseModelId,
+            description: document.getElementById('settingsTeamPresetDesc').value.trim(),
+            icon: document.getElementById('settingsTeamPresetIcon').value.trim(),
+            system_prompt: document.getElementById('settingsTeamPresetPrompt').value,
+            temperature: parseFloat(document.getElementById('settingsTeamPresetTemp').value) || undefined,
+            max_tokens: parseInt(document.getElementById('settingsTeamPresetMaxTokens').value) || undefined,
+        };
+        try {
+            await API.teamCreatePreset(teamId, preset);
+            document.getElementById('settingsTeamAddPreset').style.display = 'none';
+            ['settingsTeamPresetName','settingsTeamPresetDesc','settingsTeamPresetIcon','settingsTeamPresetPrompt','settingsTeamPresetTemp','settingsTeamPresetMaxTokens']
+                .forEach(id => { const el = document.getElementById(id); if (el) el.value = ''; });
+            UI.toast('Team preset created');
+            await UI.loadTeamManagePresets(teamId);
+            await fetchModels(); // refresh model selector
+        } catch (e) { UI.toast(e.message, 'error'); }
+    });
+
     // Admin — banner controls
     document.getElementById('adminBannerEnabled')?.addEventListener('change', (e) => {
         document.getElementById('bannerConfigFields').style.display = e.target.checked ? '' : 'none';
@@ -1143,6 +1195,13 @@ function initListeners() {
     document.getElementById('adminBannerBgHex')?.addEventListener('input', (e) => { if (/^#[0-9a-f]{6}$/i.test(e.target.value)) { document.getElementById('adminBannerBg').value = e.target.value; UI.updateBannerPreview(); }});
     document.getElementById('adminBannerFgHex')?.addEventListener('input', (e) => { if (/^#[0-9a-f]{6}$/i.test(e.target.value)) { document.getElementById('adminBannerFg').value = e.target.value; UI.updateBannerPreview(); }});
 
+    // Admin — audit log
+    document.getElementById('auditRefreshBtn')?.addEventListener('click', () => UI.loadAuditLog(1));
+    document.getElementById('auditFilterAction')?.addEventListener('change', () => UI.loadAuditLog(1));
+    document.getElementById('auditFilterResource')?.addEventListener('change', () => UI.loadAuditLog(1));
+    document.getElementById('auditPrevBtn')?.addEventListener('click', () => { if (UI._auditPage > 1) UI.loadAuditLog(UI._auditPage - 1); });
+    document.getElementById('auditNextBtn')?.addEventListener('click', () => UI.loadAuditLog(UI._auditPage + 1));
+
     // Input
     const input = document.getElementById('messageInput');
     input.addEventListener('keydown', (e) => {
@@ -1722,6 +1781,36 @@ async function removeTeamMember(teamId, memberId, email) {
     } catch (e) { UI.toast(e.message, 'error'); }
 }
 
+// Settings-side team management (uses team admin API, not sys-admin)
+async function settingsUpdateTeamMember(teamId, memberId, role) {
+    try {
+        await API.teamUpdateMember(teamId, memberId, role);
+        UI.toast('Role updated');
+    } catch (e) {
+        UI.toast(e.message, 'error');
+        await UI.loadTeamManageMembers(teamId);
+    }
+}
+
+async function settingsRemoveTeamMember(teamId, memberId, email) {
+    if (!confirm(`Remove ${email} from team?`)) return;
+    try {
+        await API.teamRemoveMember(teamId, memberId);
+        UI.toast('Member removed');
+        await UI.loadTeamManageMembers(teamId);
+    } catch (e) { UI.toast(e.message, 'error'); }
+}
+
+async function settingsDeleteTeamPreset(teamId, presetId, name) {
+    if (!confirm(`Delete team preset "${name}"?`)) return;
+    try {
+        await API.teamDeletePreset(teamId, presetId);
+        UI.toast('Preset deleted');
+        await UI.loadTeamManagePresets(teamId);
+        await fetchModels();
+    } catch (e) { UI.toast(e.message, 'error'); }
+}
+
 // ── Notes Panel ─────────────────────────────
 
 var _editingNoteId = null;
diff --git a/src/js/ui.js b/src/js/ui.js
index 479fa0f..b233042 100644
--- a/src/js/ui.js
+++ b/src/js/ui.js
@@ -640,6 +640,7 @@ const UI = {
         }
         if (tab === 'models') UI.loadUserModels();
         if (tab === 'appearance') UI.loadAppearanceSettings();
+        if (tab === 'teams') UI.loadTeamsTab();
     },
 
     // ── Appearance Settings ─────────────────
@@ -710,10 +711,17 @@ const UI = {
     async loadMyTeams() {
         const section = document.getElementById('settingsTeamsSection');
         const el = document.getElementById('settingsTeamsList');
+        const tabBtn = document.getElementById('settingsTeamsTabBtn');
         if (!section || !el) return;
         try {
             const resp = await API.listMyTeams();
             const teams = resp.data || [];
+            UI._myTeams = teams;
+
+            // Show/hide the Teams tab for team admins
+            const isTeamAdmin = teams.some(t => t.my_role === 'admin');
+            if (tabBtn) tabBtn.style.display = isTeamAdmin ? '' : 'none';
+
             if (teams.length === 0) {
                 section.style.display = 'none';
                 return;
@@ -729,7 +737,102 @@ const UI = {
                     <div class="text-muted" style="font-size:11px">${t.member_count} member${t.member_count !== 1 ? 's' : ''}</div>
                 </div>
             `).join('');
-        } catch (e) { section.style.display = 'none'; }
+        } catch (e) { section.style.display = 'none'; if (tabBtn) tabBtn.style.display = 'none'; }
+    },
+
+    _myTeams: [],
+    _managingTeamId: null,
+
+    loadTeamsTab() {
+        const picker = document.getElementById('settingsTeamPicker');
+        const manage = document.getElementById('settingsTeamManage');
+        if (!picker) return;
+        manage.style.display = 'none';
+        picker.style.display = '';
+
+        const adminTeams = UI._myTeams.filter(t => t.my_role === 'admin');
+        if (adminTeams.length === 0) {
+            picker.innerHTML = '<div class="empty-hint">You are not an admin of any teams.</div>';
+            return;
+        }
+        picker.innerHTML = adminTeams.map(t => `
+            <div class="team-card" style="cursor:pointer" onclick="UI.openTeamManage('${t.id}', '${esc(t.name)}')">
+                <div class="team-card-info">
+                    <strong>${esc(t.name)}</strong>
+                    <span class="badge-admin">admin</span>
+                    <span style="margin-left:auto;color:var(--text-3);font-size:12px">Manage →</span>
+                </div>
+                ${t.description ? `<div class="text-muted" style="font-size:12px">${esc(t.description)}</div>` : ''}
+                <div class="text-muted" style="font-size:11px">${t.member_count} member${t.member_count !== 1 ? 's' : ''}</div>
+            </div>
+        `).join('');
+    },
+
+    async openTeamManage(teamId, teamName) {
+        UI._managingTeamId = teamId;
+        document.getElementById('settingsTeamPicker').style.display = 'none';
+        const manage = document.getElementById('settingsTeamManage');
+        manage.style.display = '';
+        document.getElementById('settingsTeamManageName').textContent = teamName;
+        document.getElementById('settingsTeamAddMember').style.display = 'none';
+        document.getElementById('settingsTeamAddPreset').style.display = 'none';
+        await Promise.all([UI.loadTeamManageMembers(teamId), UI.loadTeamManagePresets(teamId)]);
+    },
+
+    async loadTeamManageMembers(teamId) {
+        const el = document.getElementById('settingsTeamMembers');
+        el.innerHTML = '<div class="loading">Loading...</div>';
+        try {
+            const resp = await API.teamListMembers(teamId);
+            const members = resp.data || [];
+            el.innerHTML = members.map(m => `
+                <div class="admin-user-row" style="padding:6px 0">
+                    <div class="admin-user-info">
+                        <strong style="font-size:13px">${esc(m.display_name || m.email)}</strong>
+                        <span class="badge-${m.role === 'admin' ? 'admin' : 'user'}" style="font-size:10px">${m.role}</span>
+                    </div>
+                    <div class="admin-user-actions">
+                        <select onchange="settingsUpdateTeamMember('${teamId}','${m.id}',this.value)" class="inline-select">
+                            <option value="member" ${m.role === 'member' ? 'selected' : ''}>Member</option>
+                            <option value="admin" ${m.role === 'admin' ? 'selected' : ''}>Admin</option>
+                        </select>
+                        <button class="btn-delete" onclick="settingsRemoveTeamMember('${teamId}','${m.id}','${esc(m.email)}')" title="Remove">✕</button>
+                    </div>
+                </div>
+            `).join('') || '<div class="empty-hint">No members</div>';
+        } catch (e) { el.innerHTML = `<div class="error-hint">${esc(e.message)}</div>`; }
+    },
+
+    async loadTeamManagePresets(teamId) {
+        const el = document.getElementById('settingsTeamPresets');
+        el.innerHTML = '<div class="loading">Loading...</div>';
+        try {
+            const resp = await API.teamListPresets(teamId);
+            const presets = resp.presets || [];
+            el.innerHTML = presets.map(p => {
+                const icon = p.icon || '';
+                return `<div class="admin-preset-row" style="padding:6px 0">
+                    <div class="preset-info">
+                        <strong>${icon ? icon + ' ' : ''}${esc(p.name)}</strong>
+                        <div class="preset-meta" style="font-size:11px">${esc(p.base_model_id)}</div>
+                    </div>
+                    <button class="btn-delete" onclick="settingsDeleteTeamPreset('${teamId}','${p.id}','${esc(p.name)}')" title="Delete">✕</button>
+                </div>`;
+            }).join('') || '<div class="empty-hint">No team presets — create one to give your team preconfigured models</div>';
+        } catch (e) { el.innerHTML = `<div class="error-hint">${esc(e.message)}</div>`; }
+    },
+
+    async loadTeamPresetModelDropdown() {
+        const sel = document.getElementById('settingsTeamPresetModel');
+        if (!sel) return;
+        sel.innerHTML = '<option value="">Select base model...</option>';
+        const models = App.models.filter(m => !m.isPreset);
+        models.forEach(m => {
+            const opt = document.createElement('option');
+            opt.value = m.baseModelId || m.id;
+            opt.textContent = (m.name || m.id) + (m.provider ? ` (${m.provider})` : '');
+            sel.appendChild(opt);
+        });
     },
 
     // ── Providers ────────────────────────────
@@ -778,6 +881,7 @@ const UI = {
 
         if (tab === 'users') await this.loadAdminUsers();
         if (tab === 'stats') await this.loadAdminStats();
+        if (tab === 'audit') await this.loadAuditLog();
         if (tab === 'providers') await this.loadAdminProviders();
         if (tab === 'models') await this.loadAdminModels();
         if (tab === 'presets') await this.loadAdminPresets();
@@ -840,6 +944,85 @@ const UI = {
         } catch (e) { el.innerHTML = `<div class="error-hint">${esc(e.message)}</div>`; }
     },
 
+    _auditPage: 1,
+    _auditPerPage: 30,
+
+    async loadAuditLog(page) {
+        if (page) UI._auditPage = page;
+        const el = document.getElementById('adminAuditList');
+        el.innerHTML = '<div class="loading">Loading...</div>';
+
+        // Populate action filter on first load
+        const actionSel = document.getElementById('auditFilterAction');
+        if (actionSel && actionSel.options.length <= 1) {
+            try {
+                const resp = await API.adminListAuditActions();
+                (resp.actions || []).forEach(a => {
+                    const opt = document.createElement('option');
+                    opt.value = a;
+                    opt.textContent = a;
+                    actionSel.appendChild(opt);
+                });
+            } catch (e) { /* optional */ }
+        }
+
+        const params = {
+            page: UI._auditPage,
+            per_page: UI._auditPerPage,
+            action: document.getElementById('auditFilterAction')?.value || '',
+            resource_type: document.getElementById('auditFilterResource')?.value || '',
+        };
+
+        try {
+            const resp = await API.adminListAudit(params);
+            const entries = resp.data || [];
+            const total = resp.total || 0;
+            const totalPages = Math.ceil(total / UI._auditPerPage);
+
+            if (entries.length === 0) {
+                el.innerHTML = '<div class="empty-hint">No audit entries found</div>';
+            } else {
+                el.innerHTML = entries.map(e => {
+                    const ts = new Date(e.created_at);
+                    const timeStr = ts.toLocaleDateString() + ' ' + ts.toLocaleTimeString([], {hour:'2-digit', minute:'2-digit'});
+                    const actor = e.actor_name || 'system';
+                    const meta = UI._formatAuditMeta(e.metadata);
+                    return `<div class="audit-row">
+                        <div class="audit-main">
+                            <span class="audit-action">${esc(e.action)}</span>
+                            <span class="audit-actor">${esc(actor)}</span>
+                            <span class="audit-resource">${esc(e.resource_type)}${e.resource_id ? ':' + esc(e.resource_id).slice(0,8) : ''}</span>
+                        </div>
+                        <div class="audit-meta">
+                            ${meta ? `<span class="audit-details">${meta}</span>` : ''}
+                            <span class="audit-time">${timeStr}</span>
+                            ${e.ip_address ? `<span class="audit-ip">${esc(e.ip_address)}</span>` : ''}
+                        </div>
+                    </div>`;
+                }).join('');
+            }
+
+            // Pagination
+            const pgEl = document.getElementById('auditPagination');
+            if (totalPages > 1) {
+                pgEl.style.display = 'flex';
+                document.getElementById('auditPageInfo').textContent = `Page ${UI._auditPage} of ${totalPages} (${total} entries)`;
+                document.getElementById('auditPrevBtn').disabled = UI._auditPage <= 1;
+                document.getElementById('auditNextBtn').disabled = UI._auditPage >= totalPages;
+            } else {
+                pgEl.style.display = 'none';
+            }
+        } catch (e) { el.innerHTML = `<div class="error-hint">${esc(e.message)}</div>`; }
+    },
+
+    _formatAuditMeta(metaStr) {
+        try {
+            const m = typeof metaStr === 'string' ? JSON.parse(metaStr) : metaStr;
+            if (!m || Object.keys(m).length === 0) return '';
+            return Object.entries(m).map(([k,v]) => `${esc(k)}=${esc(String(v))}`).join(' · ');
+        } catch { return ''; }
+    },
+
     async loadAdminProviders(quiet) {
         const el = document.getElementById('adminProviderList');
         if (!quiet) el.innerHTML = '<div class="loading">Loading...</div>';